Non-Itch Timber Frame Insulation between studs

Thickness

Stud Thickness

Thermal Conductivity

U-value W/m²K

90 mm

89 mm

0.039 W/mk

0.33

90 mm

89 mm

0.0425 W/mk

0.34

140 mm

140 mm

0.039 W/mk

0.25

140 mm

140 mm

0.0425 W/mk

0.26

Non-Itch Timber Frame Insulation Slabs including standard breather membrane

Thickness

140 mm

140 mm

Thickness

Width

Length

Area

Slabs per pack

Thermal Conductivity

Thermal Resistance

90 mm

550mm

1.17M

9.01m²

14

0.0425 W/mk

2.117m²K/W

90 mm

550mm

1.17M

9.01m²

14

0.039 W/mk

2.307m²K/W

140 mm

550mm

1.17M

6.44m²

10

0.0425 W/mk

3.294m²K/W

140 mm

550mm

1.17M

5.15m²

8

0.039 W/mk

3.589m²K/W

Fire Test BS 5803-4 = Passed

Tensile Strength

83.3 kPa

Application

Non-Itch Timber Frame Insulation Slabs are for the thermal insulation of external walls in timber frame construction. Non-Itch Timber Frame Insulation Slabs are fitted between studs.
Handling and Storage
Non-Itch Timber Frame Insulation Slab is easy to handle with no protective clothing and easy to install, being lightweight and easily cut to size. It is supplied in polythene packaging, designed for short term protection only.

Non-Itch Cavity Wall Insulation within the wall cavity

The table below shows the U-values achieved using Non-Itch Cavity Insulation slab 39 placed within the cavity of external masonry walls.

Thickness

Dense Block (λ1.100)

Medium Block (λ0.340)

Areated Block (λ0.110)

65mm

0.44

0.41

0.33

75mm

0.40

0.37

0.30

85mm

0.36

0.34

0.28

100mm

0.32

0.30

0.25

Fire Test BS 5803-4 = Passed

Tensile Strength

Water Vapour Diffusion Resistance Factor

83.3 kPa

1.77

Application

Installation of slabs should start below the DPC (preferably by at least 150mm) to minimise cold bridging. The first row of ties should be at 450mm centres horizontally. The width of cut batts should always be 5mm greater than the width to be insulated, eg wall tie centres.

Build up a complete section of the leading leaf to one course above the next row of wall ties spaced at max. 900 mm horizontally. Ensure that all mortar joints are properly filled, particularly the perpends.

It is essential that all joints between Non-Itch slabs are clean and tightly butted. Fit Non-Itch cavity slabs by compressing between the two rows of wall ties to form a clean and tight butt jointed course. To prevent water penetration to the inner leaf during driving rain, it is essential that no gaps are left between the slabs.

Fit the slabs closely around wall openings. Slit the slabs neatly where additional wall ties occur.

At corner joints, edges must be closely butted. Cut the slabs accurately to fit between wall ties, if not conventionally coursed.

Handling and Storage

Non-Itch Cavity Insulation slab 39 is easy to handle with no protective clothing and easy to install, being lightweight and easily cut to size. It is supplied in polythene packaging, designed for short term protection only.

Protect the top of the cavity wall insulation at the end of the work period with a waterproof covering. Store or cover Non-Itch cavity slabs not in use and protect from site damage.

Product Testing

Test Report No: 0207-L-07

EN 12087: Thermal insulating products for building applications - Determination of long term water absorption by immersion, method 1A (1997-07).

Test Report No: 0207-L-07

EN1604: Thermal insulating products for building applications - Determination of dimensional stability under specified temperature and humidity conditions (1997-01).

Test Report No: 0207-L-07

EN 12667: Thermal performance of building materials and products - Determination of thermal resistance by means of guarded hot plate and heat flow meter method - Products of high and medium thermal resistance (2001-02).

Test Report No: 0207-L-07

EN822: Thermal insulating products for building applications - Determination of length and width (1994-11).

Test Report No: 0207-L-07

EN823: Thermal insulating products for building applications - Determination of thickness(1995-05).

Test Report No: 0207-L-07

BS 5803-4: Thermal insulation for use in pitched roof spaces in dwellings - Part 4: Methods for determining flammability and resistance to smoldering (1985).