Single layer between studs -
Superglass Timber &Rafter Roll/Batt
Timberframe Product
Superglass Timber & Rafter Roll/Batts are constructed of lightweight unfaced glass mineral wool available in both slab and roll form and a range of thermal conductivities.
Typical Construction
Inner leaf comprising 12.5mm plasterboard, vapour control layer, timber frame between studwork, 9mm plywood and breather membrane. A 50mm cavity separates the timber frame from the outer leaf, typically of brick.
Installation
Superglass Timber & Rafter Roll/Batt products are sized to suit studs at standard 600mm centres. The nominal thickness of the insulation should not be greater than the nominal stud depth.
Superglass Timber & Rafter Roll/Batt products are friction fitted between studs at standard centres and are self supporting. In a standard floor to ceiling height, two slabs will normally fully fill the space between sole and head plates.
Before fixing the plasterboard, a vapour control layer should be attached to the studs by staple across the inner face of the wall. The vapour control layer should be free from holes, so any gaps and tears require to be made good. When overlaps and apertures are created for the installation of services, particularly electrical boxes, these need to be carefully sealed.
The primary function of a breather membrane is to protect and weatherproof the building. It also provides a second line of defence against wind driven rain. A breather membrane should be stapled to the sheathing board at maximum 300mm centres at stud positions and 150 mm centres around openings. Breather membranes should be fitted from sole plate or bottom rail lapped in such a way that each joint is protected, with upper layers over lower layers to shed water away from the sheathing. Horizontal laps should be at least 100mm wide and the membrane should extend below the lowest timber member. Vertical laps should be at least 150mm and be staggered.
Thermal performance
The table on the next page gives U-values for typical prefabricated timber frame walls insulated with Superglass Timber & Rafter Roll/Batt.
Fire performance
Superglass Timber & Rafter Roll/Batt range of products is classified as Euroclass A1 to EN 13501-1.
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Prefabricated timber framed walls
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Between Studs U-values (W/m2K) insulated with Superglass Timber & Rafter Roll/Batt
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Insulation thickness (mm)
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Masonry outer leaf
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Tile/Timber clad leaf
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| Timber & Rafter Batt/Roll 35 |
140
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0.27
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0.29
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90
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0.38
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0.42
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| Timber & Rafter Batt/Roll 40 |
140
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0.29
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0.32
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90
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0.41
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0.46
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with low emissivity breather membrane*
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| Timber & Rafter Batt/Roll 35 |
140
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0.25
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N/A
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90
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0.35
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N/A
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| NOTES The U-values have been calculated to BS EN ISO 6946: 1997. Studs assumed to be 38mm wide at 600mm centres (allowances for sole plates etc, give a 15% bridging area for the timber). Stud depth is taken to be the same as the thickness of insulation specified. *Low emissivity airspace should increase R value of unventilated cavity to 0.44 m2K/W. |
System advantages
- Insulation fitted in one process
- Timber & Rafter Roll/Batt dimensioned to friction fit tightly between
System advantages
- Insulation fitted in one process
- Timber & Rafter Roll/Batt dimensioned to friction fit tightly between timber studs at standard centres
- Timber & Rafter Roll/Batt enhances acoustic performance of walls
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