Lateral dampness occurs when the internal floor level is lower than the external ground level. Lateral damp penetration from the surrounding ground into the internal wall can cause plaster and brick damage through the migration of hygroscopic salts. Before drainage works are undertaken, the plumbing junctions should be inspected to eliminate them as a source of moisture.
In order to effectively drain and damp proof the walls from the positive side, the surrounding earth needs to be trenched 600mm wide down to the footings to allow sufficient working space.
After exposure of the sub-ground walls, our professional and reliable team of experts at FG James Pty Ltd will tank and seal the sub-ground section of the walls by brush application of cementitious membrane in slurry form to the brick faces of the walls. This has the combined effect of sealing any gaps in the brickwork and waterproofing in its own right.
After suitable priming, we will apply an elastomeric membrane prior to the installation of a geo-textile covered cut off drain plumbed to SW. The tanking will be protected with protector board and the trench will be backfilled to 200mm from the surface with 20mm aggregate and the original ground made good.