What is Rising Damp? By Danny Neill

What is Rising Damp?

What is Rising Damp?

Rising Damp

Are you finding Dark Patches on your internal walls? Peeling Wallpaper, Blistering Paint or Salt Efflorescence? These are the most common signs of Rising Dampness.

Here we focus on the problems associated with Rising Damp, and more importantly, how to treat it.

Rising Damp is a common problem in older properties either because no damp proof course (DPC) was provided at the time of building, or because a physical membrane has failed or been 'bridged'. In the majority of cases the provision of a remedial DPC is a cost effective and minimum disturbance option.

Dampness in buildings if left untreated can lead to structural deterioration; it will result in decay of timber, spoil decorations and can have problematic health effects through the development of moulds and mites.

The source of rising damp is the soil or subsoils which are always wet. Soils consist of biodegraded plant matter hence water in soils is nor pure and usually contains nitrate and chloride salts. These rise through the masonry and are left behind as water evaporates. Rising damp over a number of years can cause high levels of salts in masonry. These residual salts are hygroscopic, hence they contribute to the problems found.

Rising damp results from the capillary action of water from the ground. In the absence of an adequate DPC a zone rising to around 50cm (or more) above the skirting level along the whole length of the wall will result.

Where the DPC is damaged or breached, patches of dampness may occur.

Initially the Damp Proofing Course needs to be renewed.

Damp Proofing Cream

At Platinum Building Chemicals we supply a wide range of market leading Damp Proofing Creams.

The injection of a Damp Proofing Cream is a very easy solution to treat Rising Damp in Masonry Substrates, having the benefits of a fast injection with little mess and the product itself being low in hazard.

Damp Proofing Cream can be used in all types of masonry without the use of high pressure equipment.

Our product range includes many well known brands such as DampSolve™DampSolve™-40, SikaMur® Injectocream and Ultracure™.

We also supply a range of Damp Proofing Cream Kits, which include the DPC Injection Cream in a range of cartridge sizes, the required Applicator(s) and Drill Bits.

Damp Proofing Fluids

Damp Proofing Fluids are intended for injection into walls affected by rising dampness.

Damp Proofing Fluids are injected through pre-drilled holes formed either in bricks or the mortar joints to form a continuous barrier against water rising from the ground.

Our range of BBA Approved Damp Proofing Fluids include Aqueous Based Triject 3 and Siliconate K, both of which dilute with water to give you a 25 Litre ready-to-use solution.

We also have DPC No. 1, an organic Solvent-Based Stearate Resin (POAS) solution, supplied in a 25 Litre Container, ready to use.

Salt Efflorescence

Due to rising dampness, salts contained in ground water are absorbed into the masonry and subsequently into the plaster coat.

If the rising damp had been severe the plasterwork can lose key and visual evidence of this problem can often be noted by the presence of salt deposits.

Salt Neutraliser is used to overcome the problem of salts in a wide range of substrates from new plasterwork to old stone

Render Additive

After a Chemical DPC, efflorescent salts are often left behind in the wall which are harmful to the plaster finish, leaving the appearance of damp patches.

A suitable re-plastering specification must therefore be used, including a salt inhibiting and waterproofing product such as RenderProof.

This product prevents passage of residual ground salts which are harmful to plaster finishes.

Technical Advice

If you think you may have Rising Damp, but unsure what to do next? Please do not hesitate to us call on 01355 222777 for free impartial advice. We would be more than happy to assist with any questions you may have.

Alternatively you can email us at info@platinumchemicals.co.uk

Not every form of 'dampness' relates to Rising Damp. It may be problems associated with Penetrating Dampness or even Condensation Dampness, so it is important to identify exactly what the problem is, and we are here to help.

Main Image Credit: kebabknight

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