Products & Applications

Solid Ground Floors

For the insulation of suspended timber floors we would recommend the use of Seconds High Performance Rigid Urethane Insulation. The boards are easily cut to fit between the joists at any centres. Ideal for both newbuild and refurbishment.

Fixing Details

The insulation should be installed between the floor joists prior to the installation of the floor boards.
Cut boards to snugly fit joist spacings and support using either timber battens or nails driven partially into the side of joists leaving 40mm exposed.
Lay the boards between the joists so they are supported by the battens/nails.
Insulate any narrow gaps between a joist and the perimeter wall with specially cut pieces of board. Support those blocks nailed to the underside of the joists.

Position boards so that a cavity (minimum 25mm) is formed above them, will increase the insulation level of the structure whilst providing an insulated cavity for services, heating pipes etc.
Note: In the case of suspended timber ground floors where insulation is placed between structural members the U-value is calculated on a proportional area basis. In the case of a non-ground suspended floor the elemental method for calculating U-values should be adopted. Please refer to our Technical Services Department.
Boards may be cut using a sharp knife or a fine toothed saw.