Rising Damp After the insertion of a chemical damp-proof course the walls may still contain a considerable quantity of water which must be allowed to dry out naturally. Complete drying out depends on the degree of moisture, the wall thickness, the porosity of the wall surface and the ventilation over the surface of the walls.
Non-vinyl moisture permeable emulsion paint can be used after approximately 3 - 4 weeks. Impervious type wall coverings such as vinyl and washable papers or paints must not be used until the walls have fully dried. Full drying out may take up to one month for each 25mm thickness of wall.
Why must the walls be Replastered?
Replastering of the walls using a salt retardant rendering system is an essential part of the damp proofing treatment. The installed damp proof course controls the rising dampness, however due to hygroscopic salt contaminates in the existing plaster / masonry, the walls will not dry out unless the recommended replastering works are undertaken. The extent of the recommended replastering is shown on the sketch plan which accompanies this report / quotation.
Floor Coverings and Obstructions etc.
The tanking system forms a barrier on the wall surfaces and therefore it is essential that all obstructions are removed prior to our arrival, including any electrical socket boxes, light switches etc., which must be removed to facilitate the installation. Pipe work and cables etc., should be removed and no penetrations should remain in the tanked areas. If any obstructions or pipework etc., are not removed, treatment will be limited to the accessible areas and ingress may occur around the obstructions, which is not covered by guarantee. Should you wish to refix items such as skirting boards, we recommend that these are attached using suitable glue adhesive. If floorcoverings remain in situ, we are unable to install our recommended wall / floor joint.
Skirting Boards etc.
Whilst all possible care will be taken in the removal of skirting boards, we cannot be held responsible for any damage however caused. Our technicians will refix the existing skirting boards where possible. However in some cases the skirting boards may be affected by wet rot (due to damp walls) or broken during removal, in which case our technicians will NOT refix the affected boards. As no charge has been made for the refixing, no allowance will be made if damaged or rotten boards are not refixed. Skirting boards deemed unsuitable for re-use will be removed from the property along with accumulated plaster debris and responsibly disposed of via licenced disposal and recycling facilities. We do not recommend the use of mdf replacement skirting boards on treated walls.