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 deteriation; 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 capilliary 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. Platinum Chemicals provide an industry leading range of BBA Approved remedial Damp Proofing Course products such as DampSolve, Ultracure and Siliconate K Aqueous DPC Fluid.
Penetrating Damp is also known as “rain penetration” and can occur through walls, roofs, window or door surrounds. Defects in roof tiles, cracked pointing, blocked weep holes or defective seals allow water to penetrate and enter the property. It is usually caused by water moving through walls from the outside of the building.
There are a number of signs to help determine if your property has penetrating damp, which include: Damaged internal decoration; Damaged plaster; Rotting skirting boards and floor timbers; Localised dampness (Random damp patches that do not dry out).
Platinum Chemicals offer many solutions to treat Penetrating Damp. Our range of treatments include Masonry Water Repellents, Waterproof Roof Coatings, Damp Proof Paints and Cementitious Tanking Products which include a range of Tanking Slurries and Admixtures. We also offer a wide range of Cavity Drain Membranes and Damp Proofing Membranes, a system which has become the most form of Structural Waterproofing in the UK.