Damp proof treatments
Damp Solutions in North London
Rising Damp-Damp Solutions North London
Rising damp comes from contact between a wall and the ground where
soil, which normally has a high water content will cause the wall to become wet. As the wall becomes wet hygroscopic salts are carried upwards from the ground and evaporate on the wall surface causing damage to the wall finish and any decorations. This damage may appear as tide marks or bubbles
The height to which dampness rises depends on wall thickness and construction, but it rarely rises above one and a half meters.
Treatment is carried out by repairing the existing damp proof course or installing a new one. This is done by drilling holes in a band around the affected area and injecting the walls with a fluid which stops capillary movement of water up the walls. Where salts are present in the plaster some plasterwork will often need to be removed and replaced.
Contact Johnson Ellis Ltd today for a free estimate.
Penetrating damp - Dry Rot in St Albans
Penetrating damp is typically caused by rainwater entering the building through a break in the construction such as broken tiles, cracked rendering or badly fitting doors and windows.
A damp patch on an inside wall or ceiling is often a sign and it may disappear in dry weather but if it persists mould will develop and in severe cases wood rotting fungus may occur.
Treatment involves making the necessary building repairs to stop water ingress.
Where appropriate a water repellent finish meeting BS 6477 may be applied.
Learn more about penetrating damp contact Johnson Ellis Ltd today.
Condensation - Dry and wet rot in St Albans
Condensation is caused by warm inside air meeting a cold surface and water being deposited from the air as it cools. It may be especially obvious on windows and the inside surface of outside walls. Evidence of a condensation problem is often seen as black spots of mould on decorations or furnishings.
Treatment varies from improving ventilation, altering domestic heating arrangements to avoid temperature extremes and in some cases installing insulation in walls.
To learn more about treating condensation please contact Johnson Ellis Ltd.
Cellar and basement tanking - Damp Solutions in North London
Wherever there is permanent lateral water penetration through an earth retaining wall, such as in a cellar or a basement, specialist treatments are required if the area is be dry and habitable.
Treatments include drained cavity, tanking by a variety of methods, or ventilated dry lining ., and they are specified by BS8102-1990 "The application of a barrier to protect a structure against water from the ground".
The method selected will depend on local conditions and your requirements. Our surveyors will be happy to discuss these with you during their visit.
Contact us today
Contact Johnson Ellis Ltd today to learn more about damp solutions in North London.