Dry screeds and fills can be used for:
Because Laterlite Plus is thermally insulating, sound absorbent, strong, stable, durable, incombustible (Euroclass A1), cannot be attacked by parasites, and extremely lightweight (330 kg/m3), it minimises the structural load, even on slabs with poor load-bearing capacity. It is also used as a dry granular layer for levelling or as fill and for support.
As a dry material that does not absorb water, it is safe to use in contact with wood or other perishable materials and significantly reduces any risks deriving from incorrect storage on site.
The most common applications are:
Laterlite Plus Expanded Clay of granule size 2-3 is used in dry screeds as a continuous (unless interrupted by battens) levelling, compensating, and insulating granulate layer. It does not require compaction, is extremely stable, and can be used even at very reduced thicknesses (from 1cm) on all the most common types of support, both for refurbishment works and new construction.
The granulate can be poured directly over any underfloor service pipes: the depth cover to pipes must be 10 mm minimum.
The dry screed is completed by laying on top of Laterlite Plus 2-3 granular levelling layer special types of dry screed boards (OSB, plasterboard, gypsum fibreboard, wood chipboard) ready to take the floor finish.
INSULATING FILL WITHIN THE DEPTH OF SUSPENDED TIMBER FLOORS
In new or refurbished timber suspended floors, loose Laterlite Plus Expanded Clay of granule size 3-8 is used as dry insulating fill between joists and battens, improving the thermal and acoustic performance of the floor without increasing the fire load or bringing or attracting damp. Because of its very good strength and stability it also helps to support the finishing layers of the floor.
NAILED TIMBER FLOORS
Because Laterlite Plus Expanded Clay is a dry hydrophobic material, it is widely used as lightweight insulation below nailed timber flooring as a substitute for gravel or non-loadbearing insulation.
It can be used:
Please see the specific sections for further information on dry fill to vaulted slabs, or insulation in contact with the ground or in roof spaces.