INSULATION FOR FLOORS

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INSULATION FOR WALLS

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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.

INSULATION FOR PITCHED ROOFS

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Insulation For Pitched Roofs

 What is a warm roof ?

A warm roof is where the insulation is located above or above and between timber rafters.

 What is a cold roof ?

A cold pitched roof is where the insulation is placed either between the rafters only or at ceiling joist level. A cold roof may be ventilated or non-ventilated.

 What is Nilvent and when do you use it ?

Kingspan nilvent is a breathable membrane which is generally used for a pitched roof construction. The breathable membrane allows the construction to breathe allowing any moisture vapour to escape as well as providing a waterproof barrier

 When using sarking felt , do I need to ventilate the roof ?

Yes, when sarking felt is used as the waterproofing layer on a pitched roof, you would need to ventilate the roof. You would need a 50mm ventilated air space between the insulation (installed between the rafters) and the top of the timber rafters.

 Does Kingspan Kooltherm K18 insulated Plasterboard have an integral vapour layer ?

Yes, Kingspan Kooltherm K18 Insulated Plasterboard has an integral vapour control barrier as part of the product.

 How do I fit insulation between rafters ?

Kingspan would recommend fitting the insulation flush between the timber rafters to form a tight fit. Any gaps should then be filled with an expanding urethane sealant or flexible mastic. Please see step by step guide.

• Measure the space between the rafters before cutting the boards as spacings vary
• Cut an insulation board such as Kingspan Kooltherm K7 Pitched Roof Board to size using a sharp knife or fine toothed saw.
• Install the correct thickness of insulation in such a manner that it is flush with the bottom of the rafters but does not fill the rafter depth.
• In all cases ensure that insulation boards between rafters are fitted tightly.
• Fill any gaps with expanding urethane sealant.
• Measure up before cutting the boards
• Cut the insulated plasterboard such as Kingspan Kooltherm K18 Insulated Plasterboard Board to size using a sharp knife or fine toothed saw.
• Where board dimensions allow, fix the boards at right angles to the underside of the rafters.
• Boards should be fixed with dry-wall timber screws, long enough to allow 25 mm penetration of the timber. These should be placed at 150 mm centres and not less than 10 mm from the edges of the board along all supporting edges.