Floors - Suspended Timber Floor Insulation Between Floor Boards

Floors

Solid Ground Floor Insulation

Suspended Timber Floor Insulation Between Floor Boards

Solid Floating Ground Floor Insulation

Suspended Timber Ground Floor Insulation

Floors - Suspended Timber Floor Insulation Between Floor Boards

INTRODUCTION
For the insulation of suspended timber floors we recommend the use of Kingspan Kooltherm® K3 Floorboard (premium performance CFC/HCFC–free rigid phenolic insulation). The boards are easily cut to fit between the joists at any centres. Ideal for both newbuild and refurbishment.

Figure 1

PRODUCT DATA

ACHIEVING U–VALUES

Kingspan Kooltherm® K3 Floorboard
Board Size	2.4 (1.2) x 1.2 (0.6)
Insulant Thickness(mm)	Refer to local distributor or Kingspan Insulation price list for current stock and non-stock sizes.
Facings	Coated glass tissue
Core	CFC/HCFC - free rigid phenolic

Thermal Conductivity
(l-value) - K3	25 to <44mm thickness 0.023 W/m².K 45mm 0.022 W/m².K

For specific project U–value calculations please call the Kingspan Insulation Technical Services Department.

1 The l-value quoted is based on the procedures for the determination of the aged values of thermal resistance and thermal conductivity, laid down by the harmonised European standard BS EN 13166, using so called 90/90 principles. Comparison with alternative products may not be appropriate unless the same procedures have been followed.

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, proprietory galvanised steel saddle clips or galvanised nails partially driven into the side of the joists. Battens/nails should be placed at an appropriate height to suit the thickness of board being employed and nails should remain 40 mm proud of the joist, see figures 2 and 3.

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 these on blocks nailed to the underside of the joists.

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

Figure 2

Figure 3