shaun@specialistconstructionsupplies.co.uk

INSULATION FOR FLOORS

Name: Specialist Construction Supplies Limited
Address: Carlton Dairy, Carlton Farm, Frank Lane, Nun Monkton, York, YO26 8EJ, UK
Telephone: 0800 047 6775

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.

For a solid ground floor with a screed finish, how are 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 underfloor 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 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.

Installation advice

Solid Concrete Floor

Insulation must be laid above Damp Proof Membrane. Minimum 1200 gauge.
Damp Proof Membrane must lap over Damp Proof Course.
Insulation should be loose laid, break-bonded and tightly butted.
A 25mm insulation perimeter strip should be used at floor edge upstands.
A separation layer (polythene or builders paper) should be used between the insulation and the floor finish.

Suspended Timber Floor

If cutting and fitting between floor joists or timbers - this should be a snug fit. Insulation can be placed on supporting battens between timbers. Gaps should be filled with expanding urethane foam.
Boards should be protected from foot traffic whilst installation takes place.
Boards are not suitable for installation directly over timber joists

Kingspan Kooltherm K3 Floorboard Insulation

Price \| 25mm Kooltherm K3	1200mm x 2400mm \| £ Call for Price
Price \| 40mm Kooltherm K3	1200mm x 2400mm \| £ Call for Price
Price \| 50mm Kooltherm K3	1200mm x 2400mm \| £ Call for Price
Price \| 60mm Kooltherm K3	1200mm x 2400mm \| £ Call for Price
Price \| 75mm Kooltherm K3	1200mm x 2400mm \| £ Call for Price
Price \| 100mm Kooltherm K3	1200mm x 2400mm \| £ Call for Price

Kingspan Thermafloor TF70 Floor Insulation

Price \| 50mm Thermafloor TF70	1200mm x 2400mm \| £ Call for Price
Price \| 60mm Thermafloor TF70	1200mm x 2400mm \| £ Call for Price
Price \| 70mm Thermafloor TF70	1200mm x 2400mm \| £ Call for Price
Price \| 75mm Thermafloor TF70	1200mm x 2400mm \| £ Call for Price
Price \| 80mm Thermafloor TF70	1200mm x 2400mm \| £ Call for Price
Price \| 100mm Thermafloor TF70	1200mm x 2400mm \| £ Call for Price
Price \| 120mm Thermafloor TF70	1200mm x 2400mm \| £ Call for Price
Price \| 150mm Thermafloor TF70	1200mm x 2400mm \| £ Call for Price

Alternative Flooring Insulation Products

Celotex GA4000 50 - 100mm Celotex XR4000 120 - 200mm Celotex TB4000 12 - 45mm

Ecotherm Eco Versal 25 - 200mm Eurothane GP 25 - 150mm Dow Floormate A 50 - 200mm

Kay Metzeler Flooring 20mm - 300mm Kay Metzeler InsulFloor-Grid 20mm -300mm

Knauf Earthwool Acoustic Floor Roll 25mm ( 10mt x 1200mm )

Knauf Earthwool Acoustic Floor Slab/Plus 25mm - 50mm ( 900mm x 600mm )

Knauf Earthwool Thermal Floor Slab/Plus 25mm - 100mm ( 900mm x 600mm )

Knauf Polyfoam ECO Floorboard Standard/Extra 25mm - 75mm ( 2500mm x 600mm )

Knauf Polyfoam ECO Floorboard Super 50mm - 100mm ( 1250mm x 600mm )

Rockwool Flexi 30mm - 200mm Rockwool Rockfloor 25mm - 150mm

Superglass Multi acoustic Roll 60 - 150mm Superglass Multi Purpose Acoustic Slab 50 - 100mm

QUINN-therm QF 20mm - 200mm EPS 70 Polystyrene Insulation Board 25mm - 150mm

INSULATION FOR WALLS

Can Kingspan Kooltherm K8 Cavity Board and Kingspan Thermawall TW50 be used in a full fill cavity wall ?

Kingspan Kooltherm K8 Cavity Board and Kingspan Thermawall TW50 are partial-fill cavity wall insulation materials. They require a clear cavity to avoid moisture penetrating into the board joints and through to the inner leaf of the wall by capillary action.

A 25 mm residual cavity width maybe suitable for building heights up to 12 metres, however the Kingspan Kooltherm K8 Cavity Board and Kingspan Thermawall TW50 must be installed in accordance with BBA certificate number 94/2992 and 94/3047 respectively. In addition where housing warranty providers (e.g. NHBC, Zurich) are involved, the residual cavity typically needs to be minimum 50 mm residual.

Can Kingspan Kooltherm K8 Cavity board and Kingspan Thermawall TW50 be used below DPC ?

Kingspan Kooltherm K8 Cavity Board and Kingspan Thermawall TW50 can be taken below D.P.C. provided that they are at or above ground level and are clear of any weak mix cavity fill.

Are electrical cables affected when used next to rigid phenolic or rigid urethane insulation ?

Electrical cables remain unaffected when positioned next to phenolic and urethane insulation. The PVC sheathing protecting the electrical cables does not react when situated next to foil/glass tissue facing on the insulation, as it is non-deleterious.

Is it possible to apply the Kingspan Kooltherm K17 Insulated Plasterboard onto an adhesive dab system to the inside face of the solid 9 inch brick wall ?

Solid brick walls can be penetrated by rain, depending on exposure and type and condition of the bricks and mortar. It is with this in mind that we would not recommend the use of an adhesive dab system but instead that Kingspan Kooltherm K18 Insulated Plasterboard are applied to either a timber batten or metal furring system in order to create a cavity between the boards and the brickwork skin.

When using Kingspan Kooltherm K18 Insulated Plasterboard do I need a separate vapour control barrier ?

No. Kingspan Kooltherm K18 Insulated Plasterboard contains an integral vapour control barrier.

At window and door reveals what cavity product would you recommend ?

Kingspan Thermabate can be used to close off window and doors openings.

What thickness of Insulation would you recommend at window reveals in a domestic refurbishment ?

In a domestic refurbishment project where it is not possible to use the same thickness as on the main wall sections, we would recommend 37.5mm Kingspan Kooltherm K17 or K18 Insulated Plasterboard to avoid cold bridging.

What fixings would you recommend for fixing Kingspan Kooltherm K18 Insulated Plasterboard onto timber battens ?

Galvaniased clout nails or dry wall screws, which are long enough to allow a minimum 25mm penetration of the timber, should be placed at 150mm centres and not less than 10mm from the edges of the board.

Can I use a skim finish plaster onto insulated plasterboards ?

Yes, the tapered edge plasterboard allows for standard decoration finishes including plaster skim as well as dry-lining techniques.

When installing Kingspan Kooltherm K17 insulated plasterboard using plaster dabs do I need any additional fixings ?

We recommend two nailable plugs are inserted per board (after the sealant has hardened) as secondary mechanical fixings, normally located at mid point within the tapered edges so that they are concealed when the system is finished.

How do you install insulation in between timber frames ?

Insulation boards can be cut with a fine tooth saw to provide a tight fit between the timber frames. To restrain the boards temporarily within a timber frame supporting battens can be used with or without large headed clout nails. Any gaps should be sealed using an expanded urethane sealant.

Should I fill any gaps between insulation and the timber frame ?

We recommend fitting insulation between the timber frame as air tight possible. Any gaps should then be filled with an expanding urethane sealant or flexible mastic sealant.