Wykamol Renovation Plaster

Wykamol Renovation Plaster is a BBA-approved, fibre-reinforced, lightweight cement/lime plaster specifically formulated for a wide range of applications, including re-plastering after the installation of a chemical damp proof course (DPC).

Designed to exhibit similar properties to a traditional 1:1:6 cement, lime, and sand mortar, this high-performance plaster incorporates lightweight perlite aggregates, enhancing thermal efficiency and reducing the risk of condensation. Its advanced formulation includes waterproofing additives and a porous structure, effectively controlling dampness and salt migration while allowing walls to dry naturally.

Additionally, the inclusion of reinforcement fibres improves flexural strength and minimises shrinkage, ensuring long-term durability. Supplied in a 20kg bag for ease of handling, Wykamol Renovation Plaster is an essential component of the Wykamol Re-Plastering Specification, fully supported by BBA Certification (Certificate No: 02/3961).

Size

Size
Sale price £23.50 Regular price
ex. VAT
Regular price £28.20 £28.20 Sale price Regular price £0.00
inc. VAT

Wykamol Renovation Plaster is a BBA-approved, fibre-reinforced, lightweight cement/lime plaster specifically formulated for a wide range of applications, including re-plastering after the installation of a chemical damp proof course (DPC).

Designed to exhibit similar properties to a traditional 1:1:6 cement, lime, and sand mortar, this high-performance plaster incorporates lightweight perlite aggregates, enhancing thermal efficiency and reducing the risk of condensation. Its advanced formulation includes waterproofing additives and a porous structure, effectively controlling dampness and salt migration while allowing walls to dry naturally.

Additionally, the inclusion of reinforcement fibres improves flexural strength and minimises shrinkage, ensuring long-term durability. Supplied in a 20kg bag for ease of handling, Wykamol Renovation Plaster is an essential component of the Wykamol Re-Plastering Specification, fully supported by BBA Certification (Certificate No: 02/3961).

Free Delivery

on orders over £100
(ex. VAT, mainland UK only)

Free Help & Advice

Call 01355 222 777
Mon.-Fri 8:30am - 4:15pm, or email us

Next Day Delivery

Order before 14:00 Mon - Fri for same day despatch

Great Service

A proudly independent family business with 40 years experience

Wykamol Renovation Plaster

✔️ BBA-certified plaster designed for re-plastering after damp-proofing, preventing the recurrence of damp-related issues.

✔️ Contains perlite aggregates to improve thermal efficiency, reducing condensation and helping to prevent black mould.

✔️ Special additives allow moisture evaporation while blocking salts, preventing efflorescence and salt contamination.

✔️ Reinforced with fibres to enhance strength, minimise shrinkage, and reduce the risk of cracking.

✔️ Compatible with Wykamol damp-proofing systems, offering a reliable solution for both refurbishment and new-build projects.

 

 

Advanced Plastering Solution for Damp-Proofing and Renovation

Wykamol Renovation Plaster is a high-performance, BBA-certified plaster specifically engineered for use in damp-proofing and refurbishment projects. Designed to be applied following the installation of a chemical damp-proof course, this advanced plaster provides a long-lasting barrier against moisture while preventing the recurrence of damp-related issues. Its innovative formulation ensures a superior finish compared to traditional sand and cement mixes, offering enhanced durability, thermal efficiency, and resistance to salt contamination.

 

Enhanced Thermal Efficiency and Mould Prevention

Unlike conventional plasters, Wykamol Renovation Plaster contains perlite aggregates that significantly improve its thermal performance. By reducing the risk of condensation, it helps prevent the formation of black mould and enhances overall indoor air quality. This makes it particularly suitable for use in high-moisture environments such as kitchens, bathrooms, and basements, where controlling humidity and dampness is essential for long-term structural integrity.

 

Moisture Management and Salt Protection

A key feature of Wykamol Renovation Plaster is its ability to regulate moisture effectively. The inclusion of waterproofing additives creates a controlled environment that allows trapped moisture within masonry to evaporate naturally while preventing the migration of salts. This crucial function eliminates the risk of salt contamination, efflorescence, and damage to decorative finishes, ensuring that walls remain structurally sound and aesthetically pleasing over time.

 

Superior Strength and Crack Resistance

Engineered for durability, Wykamol Renovation Plaster is reinforced with high-quality fibres that enhance its flexural strength and reduce shrinkage. This advanced composition minimises the risk of cracking, providing a robust and long-lasting plaster layer. Its superior adhesion ensures a strong bond to substrates, making it a reliable solution for both new-build and renovation projects.

 

Versatile Compatibility with Damp-Proofing Systems

Designed to work seamlessly with Wykamol’s full range of damp-proofing and waterproofing solutions, including the HydraDry Tanking System, this plaster offers exceptional versatility. Whether applied to basement walls, historic buildings, or modern constructions, it delivers a consistent and high-quality finish. Its pre-mixed composition ensures ease of application while maintaining excellent quality control, making it a preferred choice for professionals seeking an effective, long-term damp-proofing solution.

 

 

Product Certifications

 Wykamol Renovation Plaster is part of the Wykamol Re-Plastering Specification which is supported by BBA Certification Certificate No: 02/3961.


 

Product Benefits

  • BBA Approved for Proven Performance: Fully certified under BBA Certificate No: 02/3961, this plaster meets rigorous industry standards for quality and effectiveness in damp-proofing applications.

  • Enhanced Thermal Performance with Perlite Aggregates: The inclusion of perlite significantly reduces heat loss, improving energy efficiency and minimising the risk of condensation-related issues.

  • Prevents Formation of Black Mould and Condensation: By creating a breathable yet moisture-resistant surface, this plaster helps prevent the growth of black mould and associated damp-related issues in high-humidity environments.

  • Waterproofing Additives for Superior Damp Control: Special additives ensure effective damp resistance, allowing walls to dry naturally while preventing salt migration that could compromise decorative finishes.

  • Fibre Reinforced for Crack Prevention: High-quality reinforcement fibres minimise shrinkage and enhance the plaster’s flexural strength, reducing the likelihood of cracking or failure over time.

  • Protects Against Salt Migration and Rust Formation: By preventing the movement of salts within masonry, this plaster safeguards against unsightly efflorescence and protects embedded metal components such as angle beads and electrical conduits from corrosion.

  • Lightweight and Easy to Apply: Its specially formulated composition ensures ease of use, reducing labour time and effort while providing a high-quality, durable finish.

  • Supplied in a Convenient 20kg Bag: Packaged for safe manual handling, making it ideal for both professional contractors and DIY users seeking a reliable and efficient plastering solution.

 


Typical Applications

  • Re-Plastering After Chemical Damp Proof Course (DPC) Installation: Specifically designed for use following the application of chemical damp proofing treatments such as Wykamol Ultracure, DampSolve, DampSolve-40, and Microtech PIF Injection Fluid.

  • Damp Proofing and Salt Contamination Control: Provides an effective barrier against rising damp and salt migration, protecting walls from long-term moisture damage and ensuring a stable surface for decorative finishes.

  • Use in Kitchens and Bathrooms: Ideal for areas prone to condensation, such as kitchens, bathrooms, and utility rooms, where moisture control is essential to prevent mould growth and surface degradation.

  • Application in Basement Waterproofing Systems: Suitable for integration with Wykamol’s HydraDry Tanking System, offering enhanced protection against damp in underground structures.

  • Refurbishment of Old or Historic Buildings: Can be applied in heritage and conservation projects where a breathable plaster is required to allow moisture to escape while maintaining structural integrity.

  • General Internal Wall Plastering: Can be used on a variety of internal walls requiring a strong, lightweight, and moisture-resistant finish.

Health & Safety Recommendations

When handling and applying Wykamol Renovation Plaster, standard labour hygiene practices must be observed. Personal Protective Equipment (PPE), including gloves, goggles, and a dust mask, should be worn at all times to prevent inhalation of dust and contact with skin or eyes.

Always work in well-ventilated areas and avoid prolonged exposure to airborne particles. Consult the product label and Material Safety Data Sheet (MSDS) for detailed safety precautions. Keep out of reach of children and ensure the product is stored in a cool, dry place away from direct sunlight or sources of moisture.

 

 

Substrate Suitability

Wykamol Renovation Plaster is designed for use on a variety of substrates, particularly in damp-proofing applications. It is ideally suited for re-plastering following the installation of a chemical damp proof course (DPC) and can be applied to masonry, brick, and concrete surfaces.

The product is also compatible with tanking systems, making it suitable for basement waterproofing applications. It is essential to ensure that all substrates are structurally sound, free from contamination, and properly prepared before application to achieve optimal adhesion and long-term performance.

 

 

Surface Preparation

For re-plastering as part of a damp proof course installation, all existing plaster affected by hygroscopic salts must be removed. Plaster should be stripped at least 300mm above the last detectable sign of rising damp or salt contamination, in accordance with BS 6576. In cases of extreme salt contamination, additional preparation may be required, or the use of Wykamol CM3 Mesh Waterproof Membrane may be recommended.

For applications requiring a universal mortar backing coat, a 5-10mm layer of Wykamol Universal Mortar should be applied. All remaining plaster, wood, dust, grease, oil, organic growth, or any other foreign materials that may impair adhesion must be completely removed before proceeding.

Prior to applying Wykamol Renovation Plaster, the surface should be primed with SBR Bonding Agent, mixed in a 1:1 ratio with water. The bonding agent should be applied using a brush, roller, or spray and left until tacky to the touch, which typically takes between 30 minutes and two hours. If Wykamol Universal Mortar is being used, it should be well keyed and stable but not fully set before application of the renovation plaster. This is usually achieved within 3-12 hours.

For general use and tanking system applications, all active water leaks must be stopped using Wykamol Waterstop, a rapid-setting plugging compound. Once all leaks are plugged, the substrate should be primed and a Universal Mortar backing coat applied. If using Wykamol HydraDry Tanking Slurry, ensure the tanking layer is fully set before proceeding with the plaster application. This process typically requires 48 hours.

 

 

Mixing Instructions

Wykamol Renovation Plaster must be mixed using only clean water, a clean mixing vessel, and a mechanical paddle mixer. The recommended water addition is between 9.0 to 11.0 litres per 20kg bag. The water should be placed into the mixing container first, and then the plaster powder should be gradually added while mixing under low shear to minimise dust generation.

Once all the powder has been introduced, the mixing speed can be increased to ensure a uniform, lump-free consistency. Mixing should continue for approximately 1-3 minutes. Excessive mixing or mixing times exceeding five minutes must be avoided, as this can negatively impact the thermal properties of the plaster. Over-dilution with water can also lead to efflorescence in the final top coat.

 

 

Application Method

Wykamol Renovation Plaster should be applied using standard rendering techniques to a minimum thickness of 10mm. The maximum application thickness in a single coat is 15mm. If a greater thickness is required, the first coat should be applied at no more than 10mm, ensuring a rough texture for the next layer to adhere to. Subsequent layers should be applied once the first layer is stable but not fully set, typically within 4-12 hours.

When using this plaster as part of a damp proof course system, care must be taken to avoid bridging the damp proof course, as this can compromise the effectiveness of the damp treatment.

 

 

Conditions & Limitations

Wykamol Renovation Plaster should not be applied in temperatures below 5°C or when temperatures are expected to fall below this level within the next 24 hours. The substrate temperature must also be above 5°C before application. High humidity and poor ventilation may prolong drying times.

Multi-finish plaster is NOT recommended as a top coat, as it may not interact correctly with Wykamol’s Re-Plastering System. The only tested and approved finishing plaster for use with this system is Wykamol High Impact Plaster Finish. If alternative finishes are used, the performance and effectiveness of the system cannot be guaranteed.

 

 

Finishing & Redecoration

Once the plaster has been applied, it should be left to set for a minimum of 48 hours before applying Wykamol High Impact Plaster Finish. If the plaster thickness exceeds 15mm, or if conditions are cold and damp, the curing time should be extended to approximately 72 hours before finishing.

If a scratch coat is left as a final finish, it may be smoothed using a high-quality wood float. When redecorating, any replacement skirting boards or timber fittings should be pre-treated with a suitable preservative, such as Wykamol Microtech Dual Concentrate, to prevent moisture-related damage.

Breathable paints must be used if Wykamol High Impact Plaster Finish has been applied as part of the Re-Plastering System following a DPC installation. If redecoration occurs more than 12 months after the DPC installation, non-breathable finishes, such as standard emulsion paints and wallpapers, may be used.

Before applying permanent and impermeable finishes such as non-breathable paints or wallpapers, the moisture content of both the plaster and the substrate should be checked to ensure compatibility with the supplier’s recommendations.

 

 

Curing & Ventilation

During curing, Wykamol Renovation Plaster must be protected from strong, drying winds, as rapid evaporation can cause surface defects. Proper ventilation is essential to facilitate the drying process, especially in high-humidity environments. The plaster should be left to cure for at least 48 hours before any finishing coats are applied.

If applied over tanking slurry or in particularly damp conditions, the drying period should be extended to approximately 72 hours to allow for full curing and maximum adhesion.

 

 

Cleaning

All tools and equipment should be cleaned immediately after use with clean water to prevent the plaster from hardening on tools. Once cured, any remaining plaster can only be removed mechanically. Care should be taken to clean mixing vessels and application tools thoroughly to maintain optimal performance in future applications.

 

 

Other Information

Once a damp proof course has been installed, residual moisture within the walls must evaporate before normal dry conditions are achieved. This process may take several months, depending on the level of moisture saturation and the ventilation conditions within the property.

Wykamol Renovation Plaster should be stored in a dry, frost-free environment and used before the expiration date indicated on the packaging. Any partially used bags should be tightly sealed to prevent contamination.

This product has been formulated for professional use in both renovation and damp-proofing projects and should always be applied following the best practice guidelines outlined in BS EN 13914-2 Code of Practice for Interior Plastering. By following the correct preparation, mixing, and application procedures, Wykamol Renovation Plaster provides a highly effective, long-lasting solution for damp control and interior plastering.

Q) What is Wykamol Renovation Plaster used for?

A) Wykamol Renovation Plaster is a high-performance, BBA-approved fibre-reinforced plaster designed for damp-proofing and refurbishment projects. It is specifically formulated for re-plastering after the installation of a chemical damp-proof course (DPC), preventing the recurrence of damp-related issues. It also protects against salt migration, enhances thermal efficiency, and reduces condensation risks. The lightweight cement/lime-based formula makes it highly durable, easy to apply, and suitable for kitchens, bathrooms, basements, and general internal walls.

 

Q) Why is Wykamol Renovation Plaster better than traditional sand and cement mixes?

A) Unlike traditional sand and cement plaster, Wykamol Renovation Plaster contains lightweight perlite aggregates that significantly improve thermal insulation, reducing heat loss and minimising condensation formation. It also incorporates waterproofing additives to control moisture movement and salt migration, preventing issues like efflorescence and surface damage. Additionally, reinforcement fibres enhance the plaster’s flexural strength, reducing the risk of cracking and shrinkage.

 

Q) Is Wykamol Renovation Plaster suitable for damp-proofing applications?

A) Yes, it is specifically designed for use after damp-proofing treatments, such as the installation of a chemical DPC. The formula ensures moisture can evaporate while blocking salts and damp contamination from affecting the plaster finish. It is also compatible with tanking systems, such as Wykamol HydraDry, making it ideal for basements, cellars, and underground structures.

 

Q) Does Wykamol Renovation Plaster help prevent mould growth?

A) Yes, it actively helps to prevent the growth of black mould and damp-related fungal issues by controlling moisture levels and improving thermal efficiency. The addition of perlite aggregates reduces condensation risks, making it an excellent choice for bathrooms, kitchens, and poorly ventilated areas where damp problems are common.

 

Q) How does Wykamol Renovation Plaster prevent salt contamination?

A) The plaster contains waterproofing additives and has a porous structure, allowing moisture trapped within the masonry to evaporate naturally while blocking salts from migrating to the surface. This prevents efflorescence, decorative finish damage, and potential corrosion of embedded metals, such as angle beads and electrical conduits.

 

Q) Is Wykamol Renovation Plaster reinforced to prevent cracking?

A) Yes, high-quality reinforcement fibres are included in the formula to increase flexural strength and minimise shrinkage, reducing the risk of cracking. This makes it significantly more durable than standard plaster and ensures long-term stability.

 

Q) Can Wykamol Renovation Plaster be used in conjunction with tanking systems?

A) Yes, it is fully compatible with tanking systems, including Wykamol HydraDry Tanking Slurry. It provides an additional protective barrier, making it particularly effective for basement waterproofing and high-moisture environments.

 

Q) How is the surface prepared before applying Wykamol Renovation Plaster?

A) The substrate must be clean, structurally sound, and free from old plaster, dust, grease, oil, or contaminants. Any existing plaster affected by salts should be removed up to at least 300mm above the last detectable sign of rising damp. If severe salt contamination is present, a Wykamol CM3 Mesh Waterproof Membrane may be required. A primer coat of SBR Bonding Agent (1:1 with water) should be applied before plastering to aid adhesion.

 

Q) How is Wykamol Renovation Plaster mixed?

A) The plaster must be mixed using clean water and a mechanical paddle mixer. The recommended water addition is 9.0 – 11.0 litres per 20kg bag. Water should be placed into the mixing container first, followed by the plaster, mixing at low speed to prevent excessive air incorporation. Over-mixing or exceeding five minutes can negatively affect thermal performance.

 

Q) What is the recommended application thickness of Wykamol Renovation Plaster?

A) The plaster should be applied to a minimum thickness of 10mm and a maximum of 15mm per coat. If a greater thickness is required, apply the first coat at 10mm, ensuring a rough texture for the next layer to bond to. Additional coats should be applied once the first coat is stable but not fully set (typically 4-12 hours later).

 

Q) Can Wykamol Renovation Plaster be used as a topcoat?

A) No, it is not designed to be used as a finish coat. The only approved topcoat is Wykamol High Impact Plaster Finish, which is breathable and compatible with the damp-proofing system. Standard multi-finish plasters should NOT be used, as they may not bond correctly or interact effectively with the system.

 

Q) How long does Wykamol Renovation Plaster take to dry?

A) The drying time depends on thickness, humidity, and ventilation. In normal conditions, the plaster should be left for at least 48 hours before applying a topcoat. If the plaster thickness exceeds 15mm, or the conditions are cold and damp, it may take up to 72 hours before finishing coats can be applied.

 

Q) What types of paint can be used over Wykamol Renovation Plaster?

A) Only breathable paints should be used if the plaster is applied as part of a damp-proofing system. If redecoration occurs more than 12 months after DPC installation, non-breathable paints and wallpapers can be used. However, before applying permanent coatings, the moisture content of the plaster should be checked to ensure compatibility.

 

Q) Can Wykamol Renovation Plaster be applied in cold weather?

A) No, the plaster should not be applied in temperatures below 5°C or when temperatures are expected to drop below this level within 24 hours. Cold conditions slow down curing times, and high humidity can prolong drying. Adequate ventilation should be maintained to ensure proper drying.

 

Q) How should Wykamol Renovation Plaster be stored?

A) The plaster should be stored in a dry, frost-free environment, away from moisture or direct sunlight. Unused bags should be tightly sealed to prevent contamination. The shelf life is indicated on the packaging, and expired product should not be used.

 

Q) Can Wykamol Renovation Plaster be used in heritage and conservation projects?

A) Yes, it is suitable for use in historic and conservation buildings, as it allows walls to breathe while preventing damp-related deterioration. It provides an effective solution for re-plastering old masonry without trapping moisture, which is crucial for preserving listed or heritage properties.

 

Q) How is Wykamol Renovation Plaster cleaned from tools?

A) All tools and equipment should be cleaned immediately after use with clean water to prevent the plaster from hardening on surfaces. Once cured, removal is only possible mechanically (e.g., sanding or grinding). Proper cleaning extends the lifespan of mixing and application tools.

Wykamol Renovation Plaster

✔️ BBA-certified plaster designed for re-plastering after damp-proofing, preventing the recurrence of damp-related issues.

✔️ Contains perlite aggregates to improve thermal efficiency, reducing condensation and helping to prevent black mould.

✔️ Special additives allow moisture evaporation while blocking salts, preventing efflorescence and salt contamination.

✔️ Reinforced with fibres to enhance strength, minimise shrinkage, and reduce the risk of cracking.

✔️ Compatible with Wykamol damp-proofing systems, offering a reliable solution for both refurbishment and new-build projects.

 

 

Advanced Plastering Solution for Damp-Proofing and Renovation

Wykamol Renovation Plaster is a high-performance, BBA-certified plaster specifically engineered for use in damp-proofing and refurbishment projects. Designed to be applied following the installation of a chemical damp-proof course, this advanced plaster provides a long-lasting barrier against moisture while preventing the recurrence of damp-related issues. Its innovative formulation ensures a superior finish compared to traditional sand and cement mixes, offering enhanced durability, thermal efficiency, and resistance to salt contamination.

 

Enhanced Thermal Efficiency and Mould Prevention

Unlike conventional plasters, Wykamol Renovation Plaster contains perlite aggregates that significantly improve its thermal performance. By reducing the risk of condensation, it helps prevent the formation of black mould and enhances overall indoor air quality. This makes it particularly suitable for use in high-moisture environments such as kitchens, bathrooms, and basements, where controlling humidity and dampness is essential for long-term structural integrity.

 

Moisture Management and Salt Protection

A key feature of Wykamol Renovation Plaster is its ability to regulate moisture effectively. The inclusion of waterproofing additives creates a controlled environment that allows trapped moisture within masonry to evaporate naturally while preventing the migration of salts. This crucial function eliminates the risk of salt contamination, efflorescence, and damage to decorative finishes, ensuring that walls remain structurally sound and aesthetically pleasing over time.

 

Superior Strength and Crack Resistance

Engineered for durability, Wykamol Renovation Plaster is reinforced with high-quality fibres that enhance its flexural strength and reduce shrinkage. This advanced composition minimises the risk of cracking, providing a robust and long-lasting plaster layer. Its superior adhesion ensures a strong bond to substrates, making it a reliable solution for both new-build and renovation projects.

 

Versatile Compatibility with Damp-Proofing Systems

Designed to work seamlessly with Wykamol’s full range of damp-proofing and waterproofing solutions, including the HydraDry Tanking System, this plaster offers exceptional versatility. Whether applied to basement walls, historic buildings, or modern constructions, it delivers a consistent and high-quality finish. Its pre-mixed composition ensures ease of application while maintaining excellent quality control, making it a preferred choice for professionals seeking an effective, long-term damp-proofing solution.

 

 

Product Certifications

 Wykamol Renovation Plaster is part of the Wykamol Re-Plastering Specification which is supported by BBA Certification Certificate No: 02/3961.


 

Product Benefits

  • BBA Approved for Proven Performance: Fully certified under BBA Certificate No: 02/3961, this plaster meets rigorous industry standards for quality and effectiveness in damp-proofing applications.

  • Enhanced Thermal Performance with Perlite Aggregates: The inclusion of perlite significantly reduces heat loss, improving energy efficiency and minimising the risk of condensation-related issues.

  • Prevents Formation of Black Mould and Condensation: By creating a breathable yet moisture-resistant surface, this plaster helps prevent the growth of black mould and associated damp-related issues in high-humidity environments.

  • Waterproofing Additives for Superior Damp Control: Special additives ensure effective damp resistance, allowing walls to dry naturally while preventing salt migration that could compromise decorative finishes.

  • Fibre Reinforced for Crack Prevention: High-quality reinforcement fibres minimise shrinkage and enhance the plaster’s flexural strength, reducing the likelihood of cracking or failure over time.

  • Protects Against Salt Migration and Rust Formation: By preventing the movement of salts within masonry, this plaster safeguards against unsightly efflorescence and protects embedded metal components such as angle beads and electrical conduits from corrosion.

  • Lightweight and Easy to Apply: Its specially formulated composition ensures ease of use, reducing labour time and effort while providing a high-quality, durable finish.

  • Supplied in a Convenient 20kg Bag: Packaged for safe manual handling, making it ideal for both professional contractors and DIY users seeking a reliable and efficient plastering solution.

 


Typical Applications

  • Re-Plastering After Chemical Damp Proof Course (DPC) Installation: Specifically designed for use following the application of chemical damp proofing treatments such as Wykamol Ultracure, DampSolve, DampSolve-40, and Microtech PIF Injection Fluid.

  • Damp Proofing and Salt Contamination Control: Provides an effective barrier against rising damp and salt migration, protecting walls from long-term moisture damage and ensuring a stable surface for decorative finishes.

  • Use in Kitchens and Bathrooms: Ideal for areas prone to condensation, such as kitchens, bathrooms, and utility rooms, where moisture control is essential to prevent mould growth and surface degradation.

  • Application in Basement Waterproofing Systems: Suitable for integration with Wykamol’s HydraDry Tanking System, offering enhanced protection against damp in underground structures.

  • Refurbishment of Old or Historic Buildings: Can be applied in heritage and conservation projects where a breathable plaster is required to allow moisture to escape while maintaining structural integrity.

  • General Internal Wall Plastering: Can be used on a variety of internal walls requiring a strong, lightweight, and moisture-resistant finish.

Health & Safety Recommendations

When handling and applying Wykamol Renovation Plaster, standard labour hygiene practices must be observed. Personal Protective Equipment (PPE), including gloves, goggles, and a dust mask, should be worn at all times to prevent inhalation of dust and contact with skin or eyes.

Always work in well-ventilated areas and avoid prolonged exposure to airborne particles. Consult the product label and Material Safety Data Sheet (MSDS) for detailed safety precautions. Keep out of reach of children and ensure the product is stored in a cool, dry place away from direct sunlight or sources of moisture.

 

 

Substrate Suitability

Wykamol Renovation Plaster is designed for use on a variety of substrates, particularly in damp-proofing applications. It is ideally suited for re-plastering following the installation of a chemical damp proof course (DPC) and can be applied to masonry, brick, and concrete surfaces.

The product is also compatible with tanking systems, making it suitable for basement waterproofing applications. It is essential to ensure that all substrates are structurally sound, free from contamination, and properly prepared before application to achieve optimal adhesion and long-term performance.

 

 

Surface Preparation

For re-plastering as part of a damp proof course installation, all existing plaster affected by hygroscopic salts must be removed. Plaster should be stripped at least 300mm above the last detectable sign of rising damp or salt contamination, in accordance with BS 6576. In cases of extreme salt contamination, additional preparation may be required, or the use of Wykamol CM3 Mesh Waterproof Membrane may be recommended.

For applications requiring a universal mortar backing coat, a 5-10mm layer of Wykamol Universal Mortar should be applied. All remaining plaster, wood, dust, grease, oil, organic growth, or any other foreign materials that may impair adhesion must be completely removed before proceeding.

Prior to applying Wykamol Renovation Plaster, the surface should be primed with SBR Bonding Agent, mixed in a 1:1 ratio with water. The bonding agent should be applied using a brush, roller, or spray and left until tacky to the touch, which typically takes between 30 minutes and two hours. If Wykamol Universal Mortar is being used, it should be well keyed and stable but not fully set before application of the renovation plaster. This is usually achieved within 3-12 hours.

For general use and tanking system applications, all active water leaks must be stopped using Wykamol Waterstop, a rapid-setting plugging compound. Once all leaks are plugged, the substrate should be primed and a Universal Mortar backing coat applied. If using Wykamol HydraDry Tanking Slurry, ensure the tanking layer is fully set before proceeding with the plaster application. This process typically requires 48 hours.

 

 

Mixing Instructions

Wykamol Renovation Plaster must be mixed using only clean water, a clean mixing vessel, and a mechanical paddle mixer. The recommended water addition is between 9.0 to 11.0 litres per 20kg bag. The water should be placed into the mixing container first, and then the plaster powder should be gradually added while mixing under low shear to minimise dust generation.

Once all the powder has been introduced, the mixing speed can be increased to ensure a uniform, lump-free consistency. Mixing should continue for approximately 1-3 minutes. Excessive mixing or mixing times exceeding five minutes must be avoided, as this can negatively impact the thermal properties of the plaster. Over-dilution with water can also lead to efflorescence in the final top coat.

 

 

Application Method

Wykamol Renovation Plaster should be applied using standard rendering techniques to a minimum thickness of 10mm. The maximum application thickness in a single coat is 15mm. If a greater thickness is required, the first coat should be applied at no more than 10mm, ensuring a rough texture for the next layer to adhere to. Subsequent layers should be applied once the first layer is stable but not fully set, typically within 4-12 hours.

When using this plaster as part of a damp proof course system, care must be taken to avoid bridging the damp proof course, as this can compromise the effectiveness of the damp treatment.

 

 

Conditions & Limitations

Wykamol Renovation Plaster should not be applied in temperatures below 5°C or when temperatures are expected to fall below this level within the next 24 hours. The substrate temperature must also be above 5°C before application. High humidity and poor ventilation may prolong drying times.

Multi-finish plaster is NOT recommended as a top coat, as it may not interact correctly with Wykamol’s Re-Plastering System. The only tested and approved finishing plaster for use with this system is Wykamol High Impact Plaster Finish. If alternative finishes are used, the performance and effectiveness of the system cannot be guaranteed.

 

 

Finishing & Redecoration

Once the plaster has been applied, it should be left to set for a minimum of 48 hours before applying Wykamol High Impact Plaster Finish. If the plaster thickness exceeds 15mm, or if conditions are cold and damp, the curing time should be extended to approximately 72 hours before finishing.

If a scratch coat is left as a final finish, it may be smoothed using a high-quality wood float. When redecorating, any replacement skirting boards or timber fittings should be pre-treated with a suitable preservative, such as Wykamol Microtech Dual Concentrate, to prevent moisture-related damage.

Breathable paints must be used if Wykamol High Impact Plaster Finish has been applied as part of the Re-Plastering System following a DPC installation. If redecoration occurs more than 12 months after the DPC installation, non-breathable finishes, such as standard emulsion paints and wallpapers, may be used.

Before applying permanent and impermeable finishes such as non-breathable paints or wallpapers, the moisture content of both the plaster and the substrate should be checked to ensure compatibility with the supplier’s recommendations.

 

 

Curing & Ventilation

During curing, Wykamol Renovation Plaster must be protected from strong, drying winds, as rapid evaporation can cause surface defects. Proper ventilation is essential to facilitate the drying process, especially in high-humidity environments. The plaster should be left to cure for at least 48 hours before any finishing coats are applied.

If applied over tanking slurry or in particularly damp conditions, the drying period should be extended to approximately 72 hours to allow for full curing and maximum adhesion.

 

 

Cleaning

All tools and equipment should be cleaned immediately after use with clean water to prevent the plaster from hardening on tools. Once cured, any remaining plaster can only be removed mechanically. Care should be taken to clean mixing vessels and application tools thoroughly to maintain optimal performance in future applications.

 

 

Other Information

Once a damp proof course has been installed, residual moisture within the walls must evaporate before normal dry conditions are achieved. This process may take several months, depending on the level of moisture saturation and the ventilation conditions within the property.

Wykamol Renovation Plaster should be stored in a dry, frost-free environment and used before the expiration date indicated on the packaging. Any partially used bags should be tightly sealed to prevent contamination.

This product has been formulated for professional use in both renovation and damp-proofing projects and should always be applied following the best practice guidelines outlined in BS EN 13914-2 Code of Practice for Interior Plastering. By following the correct preparation, mixing, and application procedures, Wykamol Renovation Plaster provides a highly effective, long-lasting solution for damp control and interior plastering.

Q) What is Wykamol Renovation Plaster used for?

A) Wykamol Renovation Plaster is a high-performance, BBA-approved fibre-reinforced plaster designed for damp-proofing and refurbishment projects. It is specifically formulated for re-plastering after the installation of a chemical damp-proof course (DPC), preventing the recurrence of damp-related issues. It also protects against salt migration, enhances thermal efficiency, and reduces condensation risks. The lightweight cement/lime-based formula makes it highly durable, easy to apply, and suitable for kitchens, bathrooms, basements, and general internal walls.

 

Q) Why is Wykamol Renovation Plaster better than traditional sand and cement mixes?

A) Unlike traditional sand and cement plaster, Wykamol Renovation Plaster contains lightweight perlite aggregates that significantly improve thermal insulation, reducing heat loss and minimising condensation formation. It also incorporates waterproofing additives to control moisture movement and salt migration, preventing issues like efflorescence and surface damage. Additionally, reinforcement fibres enhance the plaster’s flexural strength, reducing the risk of cracking and shrinkage.

 

Q) Is Wykamol Renovation Plaster suitable for damp-proofing applications?

A) Yes, it is specifically designed for use after damp-proofing treatments, such as the installation of a chemical DPC. The formula ensures moisture can evaporate while blocking salts and damp contamination from affecting the plaster finish. It is also compatible with tanking systems, such as Wykamol HydraDry, making it ideal for basements, cellars, and underground structures.

 

Q) Does Wykamol Renovation Plaster help prevent mould growth?

A) Yes, it actively helps to prevent the growth of black mould and damp-related fungal issues by controlling moisture levels and improving thermal efficiency. The addition of perlite aggregates reduces condensation risks, making it an excellent choice for bathrooms, kitchens, and poorly ventilated areas where damp problems are common.

 

Q) How does Wykamol Renovation Plaster prevent salt contamination?

A) The plaster contains waterproofing additives and has a porous structure, allowing moisture trapped within the masonry to evaporate naturally while blocking salts from migrating to the surface. This prevents efflorescence, decorative finish damage, and potential corrosion of embedded metals, such as angle beads and electrical conduits.

 

Q) Is Wykamol Renovation Plaster reinforced to prevent cracking?

A) Yes, high-quality reinforcement fibres are included in the formula to increase flexural strength and minimise shrinkage, reducing the risk of cracking. This makes it significantly more durable than standard plaster and ensures long-term stability.

 

Q) Can Wykamol Renovation Plaster be used in conjunction with tanking systems?

A) Yes, it is fully compatible with tanking systems, including Wykamol HydraDry Tanking Slurry. It provides an additional protective barrier, making it particularly effective for basement waterproofing and high-moisture environments.

 

Q) How is the surface prepared before applying Wykamol Renovation Plaster?

A) The substrate must be clean, structurally sound, and free from old plaster, dust, grease, oil, or contaminants. Any existing plaster affected by salts should be removed up to at least 300mm above the last detectable sign of rising damp. If severe salt contamination is present, a Wykamol CM3 Mesh Waterproof Membrane may be required. A primer coat of SBR Bonding Agent (1:1 with water) should be applied before plastering to aid adhesion.

 

Q) How is Wykamol Renovation Plaster mixed?

A) The plaster must be mixed using clean water and a mechanical paddle mixer. The recommended water addition is 9.0 – 11.0 litres per 20kg bag. Water should be placed into the mixing container first, followed by the plaster, mixing at low speed to prevent excessive air incorporation. Over-mixing or exceeding five minutes can negatively affect thermal performance.

 

Q) What is the recommended application thickness of Wykamol Renovation Plaster?

A) The plaster should be applied to a minimum thickness of 10mm and a maximum of 15mm per coat. If a greater thickness is required, apply the first coat at 10mm, ensuring a rough texture for the next layer to bond to. Additional coats should be applied once the first coat is stable but not fully set (typically 4-12 hours later).

 

Q) Can Wykamol Renovation Plaster be used as a topcoat?

A) No, it is not designed to be used as a finish coat. The only approved topcoat is Wykamol High Impact Plaster Finish, which is breathable and compatible with the damp-proofing system. Standard multi-finish plasters should NOT be used, as they may not bond correctly or interact effectively with the system.

 

Q) How long does Wykamol Renovation Plaster take to dry?

A) The drying time depends on thickness, humidity, and ventilation. In normal conditions, the plaster should be left for at least 48 hours before applying a topcoat. If the plaster thickness exceeds 15mm, or the conditions are cold and damp, it may take up to 72 hours before finishing coats can be applied.

 

Q) What types of paint can be used over Wykamol Renovation Plaster?

A) Only breathable paints should be used if the plaster is applied as part of a damp-proofing system. If redecoration occurs more than 12 months after DPC installation, non-breathable paints and wallpapers can be used. However, before applying permanent coatings, the moisture content of the plaster should be checked to ensure compatibility.

 

Q) Can Wykamol Renovation Plaster be applied in cold weather?

A) No, the plaster should not be applied in temperatures below 5°C or when temperatures are expected to drop below this level within 24 hours. Cold conditions slow down curing times, and high humidity can prolong drying. Adequate ventilation should be maintained to ensure proper drying.

 

Q) How should Wykamol Renovation Plaster be stored?

A) The plaster should be stored in a dry, frost-free environment, away from moisture or direct sunlight. Unused bags should be tightly sealed to prevent contamination. The shelf life is indicated on the packaging, and expired product should not be used.

 

Q) Can Wykamol Renovation Plaster be used in heritage and conservation projects?

A) Yes, it is suitable for use in historic and conservation buildings, as it allows walls to breathe while preventing damp-related deterioration. It provides an effective solution for re-plastering old masonry without trapping moisture, which is crucial for preserving listed or heritage properties.

 

Q) How is Wykamol Renovation Plaster cleaned from tools?

A) All tools and equipment should be cleaned immediately after use with clean water to prevent the plaster from hardening on surfaces. Once cured, removal is only possible mechanically (e.g., sanding or grinding). Proper cleaning extends the lifespan of mixing and application tools.

You Might Also Like

Additional Carriage Charges Apply
On Sale
On Sale