For the insulation of solid ground floor constructions we recommend the use of either Kingspan Thermafloor TF70 zero ODP (high performance CFC/HCFCfree rigid urethane insulation) or Kingspan Kooltherm K3 Floorboard (premium performance CFCfree rigid phenolic insulation) positioned below the floor slab or beneath a floor screed. It can be used over whole floor areas or as an edge insulant at the floor perimeter. Ideal for both newbuild and refurbishment.

FIXING DETAILS

* Ensure boards are laid above the damp proof membrane, and that the d.p.m. maintains continuity with the damp proof course installed in the surrounding walls.

* The boards must be continuously supported over a level surface free from projections. A thin sand blinding may be used to achieve this over tamped slabs or rolled hardcore.

* A 20 mm thickness of Kingspan Thermafloor TF70 zero ODP should be used to insulate the perimeter of the floor. By insulating the full depth of the screed/screed and slab, cold bridging will be eliminated.

* Lay boards with butted, staggered joints and overlay with a polythene sheet (min 500 gauge) to act as a vapour control layer and to prevent wet screeds penetrating the board joints.

* For domestic constructions complete the floor with a 65 mm min thickness sand/ cement screed laid over the polythene sheet (75 mm thickness in other buildings).

* Alternatively the floor slab can be cast over the boards/polythene.

* Ensure boards are protected during installation from wheeled/foot traffic by using scaffold planks etc.

* Boards may be cut using a sharp knife or fine toothed saw.