Benefits:

• Premium performance rigid phenolic insulation – thermal conductivity as low as 0.021 W/m.K

• On average its use creates 15% more usable warm roof space
  

• Negligible smoke obscuration
  

• Class 0 / Low Risk fire rating
  

• Insulation of pipes and tanks is unnecessary
  

• No condensation risk
  

• Unaffected by air movement
  

• Resistant to the passage of water vapour
  

• Easy to handle and install
  

• Ideal for new build and refurbishment
  

• Non–deleterious material
  

• CFC/HCFC–free with zero Ozone Depletion Potential (ODP)

Product Description

The Facings

Kingspan Kooltherm® K7 Pitched Roof Board is faced on both sides with a low emissivity composite foil facing which is highly resistant to the transmission of water vapour. This reflective, low emissivity surface can effectively double the thermal resistance of the cavity in which the board is placed.

The Core

The core of Kingspan Kooltherm® K7 Pitched Roof Board is a premium performance CFC/HCFC–free rigid phenolic insulant of typical density 35 kg/m3.

CFC/HCFC–free

Kingspan Kooltherm® K7 Pitched Roof Board is manufactured without the use of CFCs/HCFCs and has zero Ozone Depletion Potential (ODP).

Standard Dimensions 600mm x 1200mm

Kingspan Kooltherm® K7 is available in the standard size of 1200mm wide by 2400mm long, and is readily available from us in the following most popular thicknesses ... 40mm, 50mm, 60mm 70mm, 100mm. We can also source the following sizes for larger orders ... 20mm, 25mm, 30mm, 35mm, 45mm, 55mm, 65mm, 75mm, 80mm, 90mm, 110mm, 120mm, 125mm, 130mm, 140mm, 145mm, and 150mm. However, short lead times may apply.

Compressive Strength

Typically exceeds 125 kPa at 10% compression when tested to BS EN 826: 1996 (Thermal insulating products for building applications. Determination of compression behaviour).

Water Vapour Resistance

Modified to include board facings, the boards achieve a resistance far greater than 100 MN.s/g when tested in accordance with BS 4370–2: 1993 (Methods of test for rigid cellular materials. Methods 7 to 9).

Durability

If correctly applied, Kingspan Kooltherm® K7 Pitched Roof Board has an indefinite life. Its durability depends on the supporting structure and the conditions of its use.

Resistance to Solvents, Fungi & Rodents

The insulation core is resistant to short–term contact with petrol and with most dilute acids, alkalis and mineral oils. However, it is recommended that any spills be cleaned off fully before the boards are installed. Ensure that safe methods of cleaning are used, as recommended by suppliers of the spilt liquid.

The insulation core is not resistant to some solvent–based adhesive systems, particularly those containing methyl ethyl ketone. Adhesives containing such solvents should not be used in association with this product. Damaged boards or boards that have been in contact with harsh solvents or acids should not be used.

Fire Performance

The rigid phenolic insulation core of Kingspan Kooltherm® K7 will achieve the results given below, which enable it to be classified by the Building Regulations as being Class 0 and as Low Risk by the Technical Standards in Scotland.

The fire rating of Kingspan Kooltherm® K7 boards when subjected to British Standard fire tests, will vary, depending on the particular application.

Test - BS 476–6: 1989 (Fire tests on building materials and structures. Method of test for fire propagation for products)

Result - 1989 Index of performance (1) not exceeding 12 and sub Index (i1) not exceeding 6 (for rigid phenolic insulation core)

Test - BS 476–7: 1997 (Fire tests on building materials and structures. Method of test to determine the classification of the surface spread of flame of products

Result - Class 1 rating

Test - BS 5111–1: 1974 (Smoke Obscuration)

Result - < 5%

Over Rafter Layer of Insulation

Over rafter insulation without a sarking board (Figure 3a), is simply fixed by placing the Kingspan Kooltherm® K7 Pitched Roof Board over the rafters and under 38 x 38 mm treated softwood counter–battens in line with the rafters. Secure the counter–battens to the rafters by fixing through both the counter–battens and the Kingspan Kooltherm® K7 Pitched Roof Board.

Over rafter insulation with slates fixed directly into a sarking board (Figure 3b), is simply fixed by placing the Kingspan Kooltherm® K7 Pitched Roof Board over the rafters with the sarking board overlaid. Secure the sarking board and Kingspan Kooltherm® K7 Pitched Roof Board to the rafters by fixing through both the sarking board and the Kingspan Kooltherm® K7 Pitched Roof Board.

Over rafter insulation with a sarking board and tiles on tiling 1 battens and counter–battens, is simply fixed by placing the Kingspan Kooltherm® K7 Pitched Roof Board over the rafters with the sarking board overlaid, and with 38 x 38 mm softwood treated counter–battens in line with the rafters.

Secure the counter–battens to the rafters by fixing through the counter–batten, the sarking board and the Kingspan Kooltherm K7 Pitched Roof Board.

Kingspan Kooltherm® K7 Pitched Roof Board should be tightly butted. Boards may be laid either across or down the line of the rafters and should preferably be laid break bonded in order to help improve the racking strength of the roof. All board joints running from eaves to ridge must occur over rafters.

There is no necessity to tape board joints. A preservative treated stop rail should be secured to the rafters close to the eaves.

Fixings for Over Rafter Insulation

Helifix In–Skew, Target Skewfast, Wallfast Timfix or similar approved fixings should be applied at centres appropriate to the design of the roof and location of the building.

Refer to:
Helifix Limited +44 (0) 20 8735 5222;
Target Fixings Limited +44 (0) 1344 777 189; or
Wallfast Limited +44 (0) 23 9229 8443.

Between Rafter Layer of Insulation

Between rafter insulation can be installed by three methods.

In cases where the insulation between rafters is to be flush with the top of the rafters but does not fill the full rafter depth, install the insulation by the use of nailable sarking clips. The nailable sarking clips are driven into the upper surface of each rafter at one–metre intervals up the roof slope. The nailable sarking clips then support lengths of Kingspan Kooltherm® K7 Pitched Roof Board suitably trimmed to size and placed between the rafters.

In cases where the insulation between rafters is to be flush with the bottom of the rafters but does not fill the full rafter depth, install the insulation with the aid of battens nailed to the side of the rafters. The battens should be in the appropriate position to ensure the insulation is
flush with the bottom of the rafters.

In cases where the insulation between rafters fully fills the rafter depth, simply install the correct thickness of insulation in such a manner that it is flush with the bottom of the rafters.
In all cases, ensure that insulation boards are tightly butted and that there is a tight fit between the insulation and the rafters. Fill all gaps with expanding urethane sealant.

Under Rafter Layer of Insulation

Please refer to Kingspan Kooltherm® K18 Insulated Dry–lining Board page. Click Here.

Breathable Sarking Membrane

The specified breathable sarking membrane (such as Dupont Tyvek Supro) is applied as specified. Application advice should be sought from the appropriate membrane manufacturer.

Sarking Felt

In cases without a sarking board, the sarking felt is draped over the rafters to provide a channel for water drainage and held in place by the slate / tile battens, which are nailed through the felt to the rafters.

In cases with a sarking board, the sarking felt is applied over the sarking board and held in place by the slates or counter–battens which are nailed through the felt to the sarking board.

Slating and Tiling

Slating and tiling over Kingspan Kooltherm® K7 Pitched Roof Board is exactly the same as on any other pitched roof except that in some instances the slate / tile battens are fixed to the previously applied counter–battens. It is, however, essential that slate or tiling rubble does not lie in contact with the breathable sarking membrane (if used) as this may allow wind driven rain or melted snow to penetrate the breathable sarking membrane.

Surface Treatment

Kingspan Kooltherm® K7 Pitched Roof Board has a foil faced durable surface and no further treatment is necessary. Kingspan Kooltherm® K7 Pitched Roof Board is not intended
to provide an internal finish and should be underlined with a suitable building board.

Cutting

Cutting should be carried out either by using a fine toothed saw, or by scoring with a sharp knife, snapping the board over a straight edge and then cutting the facing on the other side.
Ensure accurate trimming to achieve close–butting joints and continuity of insulation.

Daily Working Practice

Installed Kingspan Kooltherm® K7 Pitched Roof Board should be protected against inclement weather.

Manufacturer's details

Kingspan Insulation Ltd., Pembridge, Leominster, Herefordshire, HR6 9LA

Web site: Kingspan Home Page

Kingspan Technical Advisory Service

While just-insulation provides the very best products at the very best prices ... for the very best advise we recommend you contact Kingspan directly.

• General Enquiries - Telephone: 0870 850 8555 - Fax: 0870 850 8666
  Email: info.uk@insulation.kingspan.com

• Technical Advice - Telephone: 0870 850 8333 - Fax: 01544 387 278
  Email: techline.uk@insulation.kingspan.com

• Tapered Roofing Enquiries - Telephone: 0870 761 7770 - Fax: 01544 387 289
  Email: tapered.uk@insulation.kingspan.com

• Literature and Samples - Telephone: 0870 733 8333 - Fax: 01544 387 299
  Email: literature.uk@insulation.kingspan.com

• Kingspan Online SAP Estimator - Specifiers click Here