Housing foundation

Leca® LWA Insufill is the fastest and easiest method of preparing an insulated oversight for a concrete slab or screed. It is a lightweight insulation that cuts solid floor construction time by hours. It’s availability in easy to handle, lightweight 50 litre bags that can be installed directly into the foundation without the need for emptying makes constructing and insulating replacement and new solid floors a simple, one man process. It is the lightweight alternative to both hardcore and insulation.


Key Benefits:

  • It is lightweight to make ease of handling
  • It is thermally insulating replacing the need for secondary insulation
  • It is rounded preventing damage to duct, pipe or damp proof membranes
  • It can be installed in the bag directly into the foundation
  • It saves time and money
Underfloor Insulation
Underfloor Insulation
Underfloor Insulation
Underfloor Insulation


Leca® Insufill (50L Bag) Installation

Sustainability with LECA

Environmental and sustainable issues which were probably not the main focus 75 years ago, is certainly a concern today in the modern world.

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