The Problem: rising damp and replastering damp and salt-contaminated walls
A Victorian terraced house in Whitstable was suffering from rising damp and salt damage in the living room. The period property is built of single skin brickwork, and in some areas – such as below the front facing window – the walls had become particularly saturated with damp. The plasterwork had also been damaged throughout by dampness and salts, so was in need of full replacement – some 40m2.
The Solution: quick and clean treatment with the Dryzone System
As carrying out remedial works would prevent use of the room and disrupt family life, a quicker solution was sought. The Dryzone System was chosen for its speed and efficacy. The commonly used method of sand/cement replastering can take up to 4 – 6 weeks before final redecoration can be completed. Replastering to full height was also decided upon as this would be quickest and provide a clean finish throughout – ensuring the room was protected for years to come.
Damp and salt protection
The plaster was fully removed and Dryzone damp-proofing cream injected near the base of the wall all around the room. This powerful treatment permeates through even fully saturated mortar and brick, and cures to form a highly effective barrier to rising damp.
For carrying out the replastering, Dryshield cream was first applied to the walls by brush. This stops the growth of strong salt crystals on the surface of the walls as they dry out. The cream is usually left to soak in for 30 minutes, however where the walls were very damp it was left for an hour.
Fit plasterboard around uneven walls, chimney breasts and windows
While Dryshield was left to prime the walls, the plasterboard was trimmed to size. Holes must be cut for any sockets or fixtures, and trimmed for details such as windowsills. Where one section of wall was narrower at the top, upper and lower sections of board were cut and joined for easier installation. Plasterboard was also cut to fit around the chimney breast detail.
Once the plasterboard was readied, Drygrip adhesive was dabbed on to the reverse of the boards. This is built up so that an air gap is formed between the damp walls and the plasterboard. The glue is damp and salt resistant, and when applied to even highly saturated masonry primed with Dryshield it will form a secure bond.
Positioning plugs were used to ensure the boards formed a smooth surface. Once in place the walls were ready for a skim coat of plaster. The treatment had taken just a half day to complete, with only decorating to follow. The contractor was pleased with the system as it had been straightforward to carry out and easy to fix up.
No more damp with the Dryzone System
After the Dryzone System was installed use the room was quickly regained and there have been no further issues with rising dampness. The homeowners were pleased with the swift turnaround, and that the Dryzone System provided a wholly effective treatment for their home.
- Contractor Anglian Tectonics