The health of walls in contact with the soil — like foundations and below-grade walls — is the primary concern of the home’s occupants, especially where underground garages or basements are involved: any sign of damp or mould is evidence of damage that can have serious financial consequences in these areas of the building. And restoring the interior to good health is not always feasible.
The risks lie both in the foundations — namely in the horizontal structures that receive and absorb the loads of the whole building — and in the below-grade walls, namely the vertical structures that have to withstand considerable loads. If we take the worsening weather patterns of recent years and add in pesky capillary rising damp, and groundwater pressure, there’s clearly a need to ensure the products used provide improved performance.
How do we best protect foundations and below-grade walls?
The way to keep underground rooms healthy is to use specific, tried-and-tested products, applied correctly as per the technical literature. TeMa Building Solutions has various solutions on offer.
Bentonite geocomposites
Bentonite geocomposites can be used to ensure the concrete is properly waterproofed. Comprising natural sodium bentonite, they self-bond to concrete (if used as waterproofing prior to insitu casting) and are suitable for both vertical applications (below-grade walls) and horizontal applications (slab foundations).
Studded membranes
Studded membranes are one of the most widely used products given their dual function:
- they mechanically protect waterproofing: they prevent damage to the waterproofing layer during the backfilling and compaction process at the construction phase, and protect from the subsequent micro-movements as the soil settles, and the considerable loads that the walls have to withstand
- they serve as damp-proofing: they stop moisture, which — even in the absence of hydrostatic pressure — can undermine the structure and cause patches of mould to appear on internal walls.
Drainage geocomposites
They reduce hydrostatic pressure exerted on vertical walls, conveying water away from the walls to the outer perimeter. They are laminated with one or two nonwovens serving as a filter layer, stopping the system becoming clogged. The TeMa Building Solutions range includes geonets, studded membranes and monofilament structure.
Need help choosing the right product? Contact us! Our experts are here to help you any way they can.
