Underground wall systems filled with special hydrophobic Laterlite Plus Expanded Clay simplify the processes of:
INSULATING AND DRAINING BACKFILL
Underground perimeter walls (as in cellars) can be insulated by filling all of the V shaped part of the excavation with Laterlite Plus Expanded Clay (granule size 8-20). As well as providing thermal insulation and drainage, this also reduces the horizontal ground thrust on the wall by up to 85% (for further information please refer to the geotechnics section).
This construction method is particularly appropriate for underground spaces where there are problems of damp; the damp ground in contact with the wall is replaced by the expanded clay, which is a dry and non-capillary material that reduces the risk of infiltration.
The same method is equally straightforward to apply in the case of walls that are irregular or non-planar (e.g. in historic buildings) since unlike insulating rigid panel systems, expanded clay easily adapts to these situations and does not produce waste or leftover material.
The same method is also frequently used for swimming pools to reduce thermal dispersion and ground pressure on the walls (for further information please refer to the geotechnics section).
THE TERMOBAG MODULAR SYSTEM
In new buildings with straight, regular walls, a layer of Laterlite Plus Expanded Clay of constant thickness can be created by using Termobag modules that function as an underground “insulating jacket” that is free of thermal bridges and is continuous with the horizontal ground insulation (for further information please refer to the specific section).
This method will protect any impermeable or other vulnerable layers (such as insulation) from damage due to impact or sharp stones during construction or over the life of the building.