In order to waterproof underground structures and convert them into habitable and functional basement accommodation it is necessary to provide a fully sealed basement waterproofing or tanking system to ensure the moisture in the walls and floors is not permitted to migrate to the internal wall surfaces.
Hydro static pressure forces water in through openings in foundation walls through cracks, weak pointing or penetrations caused by expansion and contraction of the footing-foundation wall joint and up through floor cracks. Hydro static pressure can cause structural damage to foundation walls and is likely to contribute to mould, dampness, decay and other moisture or water ingress related problems.
No matter how much water is getting through the existing structure, the problem can be stopped following thorough preparation of the substrate and the subsequent application of multiple coats of waterproof renders & screeds. tanking can be carried out both internally and by excavating around the structure but in most cases, it is easier to tackle from within.
Other systems of waterproofing in below ground structures could also involve crack injection, flexible joint bandage, waterproof membranes, paints & slurry coats. We also offer a water managements solution in certain circumstances, usually compromising of sheet membrane and sump pump extraction. Other advantages of using AC Contracts, is that we offer a complete basement conversion/renovation service, leaving you with a pristine finish thus creating a clean usable space.