Floors - Solid Ground Floor Insulation

Floors

Solid Ground Floor Insulation

Suspended Timber Floor Insulation Between Floor Boards

Solid Floating Ground Floor Insulation

Suspended Timber Ground Floor Insulation

Floors - Solid Ground Floor Insulation

INTRODUCTION
For the insulation of solid ground floor constructions we recommend the use of Kingspan Kooltherm® K3 Floorboard (premium performance CFC/HCFC–free 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.

Figure 1 Below the floor slab

ACHIEVING U–VALUES
The table below details typical thickness of Kingspan Kooltherm® K3 Floorboard required to achieve the various U–values to satisfy Building Regulation/Standards.

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.

2 For the purposes of these calculations using the method as detailed in BS EN ISO 13370: 1998, the soil has been assumed to be clay or silt, the wall insulation is assumed to overlap the floor insulation by 200 mm minimum and the standard of workmanship has been assumed good and therefore the correction factor for air gaps ignored.

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 Kooltherm® K3 Floorboard 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.

PRODUCT DATA

Figure 2 Below the Floor Screed

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