Barnes Plastics provide an advanced system for waffle raft slab foundations.

The traditional ‘in-ground’ concrete slab requires digging of trenches, construction of a perimeter nib wall and subsequent backfilling. This sysytem is labour intensive, does not allow accurate measurement of concrete and can be subject to considerable delays if rain occurs.

The Waffle raft slab system, on the other hand, involves building an ‘on-ground’using perimeter formwork and expanded polystyrene Voidforms, separated by plastic spacers, to create reinforced concrete ribs beneath the slab surface

Barnes VoidForm® improve energy efficiency of house slabs, by increasing the R value of the floor, saving heating and cooling costs. Using 225mm Voidforms will give a R value of 1.86 approximately 43% better than a conventional slab.

Firth Corporate
Firth RibRaft Compliant