The horizontal part of the lowest part of a building must:
If an underfloor void (constructed to separate a floor slab from the ground and insulate it) is filled with special hydrophobic Laterlite Plus 8-20 Expanded Clay it will meet all of the above requirements and will provide continuous insulation that is easy and quick to lay and will not become physically detached. It will reduce the required depth of the void and excavation, and the number of construction layers required.
In most cases, Laterlite Plus 8-20 Expanded Clay is laid loose or in sealed bags. The underfloor void is then covered with a mesh-reinforced concrete slab 10 cm thick.
Underfloor voids filled with Laterlite Plus Expanded Clay are suitable for most building types from small-scale residential to retail or office buildings, and below the heavily loaded industrial floors of factories and shopping centres (including heated floors).
To meet particular design specifications or site requirements, the top surface of the Laterlite Plus Expanded Clay can be fixed with cement or lime slurry, or where there are specific mechanical requirements the whole thickness can be mixed with cement (premixed bagged Latermix Cem Classic).
REFURBISHMENTS AND HISTORIC BUILDINGS
For works to historic buildings of architectural importance and for sustainable construction, a very appropriate technique is to recover the traditional “gravel” construction method and improve it by adding to it the new properties that Laterlite Plus Expanded Clay makes possible.
Laterlite Plus Expanded Clay is quick and simple to use even in irregularly shaped buildings, to which it easily adapts because as a loose granular material it does not produce waste and (unlike insulating panels) leaves no excess whilst providing effective insulation and acting as a barrier to rising damp.
In particular situations, this type of construction can be completed with a slab of lime concrete as a replacement for ordinary cement concrete (making reference to the dosages developed in collaboration with CESA – Chaux Et Enduits De Saint Astier).
INSULATION BELOW FOUNDATIONS
Expanded clay can be used as a continuous layer of insulation below slab foundations or any other type of slab that is in contact with the ground. e.g.:
– foundations for timber-framed houses
– ground slabs for retail or industrial buildings (industrial floors including heated floors)
– below swimming pools
– ground beams (appropriate geotechnical calculations should first be carried out).
The same method can be used for load compensation on ground with poor load-bearing capacity. For further information please refer to the specific section.
The same method can also be used to insulate and drain underground walls. For further information please refer to the specific section.