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Frequently Asked Questions - Floors

What is a floating timber floor?
A floating floor is when flooring is loose laid on top of concrete / insulation and has not been mechanically fixed.

Is there a Kingspan insulation product for a floating floor?
For domestic applications Kingspan Thermafloor TF70 can be installed onto a concrete slab with a floating timber floor.
 
For a solid ground floor with a screed finish, how are the Kooltherm K3 Floorboard and Thermafloor TF70 boards laid?
The insulation boards are loose laid onto the concrete floor with the necessary water and vapour protection such as a damp proof membrane. The board joints should be tight butted, staggered and laid to a break bond pattern. Before the screed is laid onto the insulation a separating membrane is required. This may be a polythene sheet (not less than 125microns / 500 gauge) or a building paper to BS1521:1972 (1994).

Is perimeter insulation required?
Yes. A 25mm thickness of insulation 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.

Can Kingspan Kooltherm K3 Floorboard and Thermafloor TF70 boards be used with under floor heating systems?
Yes, both Kingspan Kooltherm K3 Floorboard and Kingspan Thermafloor TF70 can be used in conjunction with under floor heating systems. We would always recommend further advice is sought from the underfloor heating manufacturer.

Can Kingspan Kooltherm K3 Floorboard and Thermafloor TF70 boards be laid below a concrete slab?
Kingspan Kooltherm K3 Floorboard and Kingspan Thermafloor TF70 can be laid below a concrete slab providing there is an appropriate damp proof membrane (DPM) (minimum 300 micron / 1200 gauge polythene). The DPM would need to have been laid over a well compacted hardcore, sand blinded with the joints well lapped and folded.