Rising dampness will occur where there is either no damp proof course, where the existing damp proof course is ineffective due to break down of the material used or to bridging by external earth or path level. In the case of the latter often the reduction in the earth/path level to below the damp course may go a long way to curing the moisture ingress.

Internally, rising dampness often results in breakdown of plaster and decorations. However this can be the result of severe and continual moisture ingress from other sources such as rainwater penetration, flue damp, etc. It is therefore of primary importance to ensure that rising dampness is not confused with other sources of moisture ingress. Where there is any doubt as to the presence of rising dampness our surveyor may take samples of plaster or wallpaper for analysis, to determine the presence of salts which result from rising damp.

SPECIALIST REPLASTERING

The installation of the damp-proof course will prevent further rising dampness. However, water attractive hygroscopic salts, transmitted by the rising dampness from the soil to the brickwork will continue to attract moisture, particularly during periods of high humidity. Where this occurs to an unacceptable degree, re-plastering to the PTL specification is required. PTL employs specialist plasterers and would be pleased to provide quotations for this work.

FORMS OF TANKING

Where tanking is required, i.e. to underground rooms or where lateral penetration of ground water is occurring, PTL will prepare a scheme for tanking together with a quotation for these works. PTL tanking normally carries a ten year guarantee. Systems used include Sika Systems and Newton 2000 Cavity Membrane System.