Close up of a concrete slab floor preparation with underfloor heating pipes fitted.

The builder prepared the floor by laying expanded polystyrene insulation and then placed the mesh on top to cover the entire surface. Insulation should also be fitted around the perimeter to correspond with the finished slab height. The underfloor heating pipe circuits were then fixed to the mesh using wire ties as shown. Once all the pipe was laid the builder raised the mesh (with pipe fixed in place) and supported it all on blocks prior the the concrete being poured.

Concrete Slab Photo - Larger Area

Concrete Slab Diagram

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