Although resulting in a similar outcome, the origin of penetrating damp can vary greatly compared with Rising damp.
Examples include leaking gutters and down pipes, defective flashings, masonry defects and poor ventilation. Basements and vaults are particularly prone to penetrating damp due to increased water pressures at sub-ground levels.
TREATMENT FOR PENTRATING DAMP AT GROUND LEVEL
As penetrating damp often occurs at levels higher than several feet from the ground a dpc would be ineffective as a remedial treatment. The procedure is to remove the existing damp plaster and re-plaster using a waterproof chemical. We use Sika 1 Waterproofer, as it has been an industry leader for over fifty years.
THREE WAYS TO TREAT PENETRATING DAMP SUB-GROUND LEVEL (TANKING)
1) Cementious Tanking system; which involves applying three coatings of sand and cement with an added waterproof chemical.
2) Cavity wall membrane system; involves a tough plastic membrane being applied to the walls and floor of the basement. Batons are then fixed to the areas and plasterboard placed over them. This leaves a dry, perfectly smooth finish, ready for decorating.
3) Epoxy system; this involves applying several coats of special waterproof epoxy product to the affected areas. The product dries and forms an impenetrable shield preventing any further damp penetration