Formalised performance specifications for rainscreen cladding
Formalised performance specifications for rainscreen cladding
Formalised performance specifications for rainscreen cladding
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CIMclad: <strong>Formalised</strong> <strong>per<strong>for</strong>mance</strong> <strong>specifications</strong> <strong>for</strong> <strong>rainscreen</strong> <strong>cladding</strong><br />
AIR PERMEABILITY THROUGH AIR BARRIER:<br />
The maximum design value <strong>for</strong> air leakage through the air barrier at a<br />
differential pressure of 50 Pascals is ______ m³/hr/m².<br />
(Normally delete this clause – only used <strong>for</strong> pressure equalised<br />
<strong>rainscreen</strong>s)<br />
NBS Section H92 400<br />
Air Permeability<br />
4 Backing Wall<br />
Per<strong>for</strong>mance<br />
THERMAL PROPERTIES:<br />
- Method <strong>for</strong> calculating the thermal transmittance (U-value) of the<br />
<strong>rainscreen</strong> wall: ______<br />
- Average U-value of <strong>rainscreen</strong> wall: ______W/m²K.<br />
430<br />
Thermal<br />
Resistance<br />
FIRE RESISTANCE OF BACKING WALL:<br />
To BS 476- 21 and not less than ______<br />
480<br />
Fire Resistance<br />
INTERNAL SURFACE SPREAD OF FLAME OF BACKING WALL:<br />
To BS 476-7, Class ______<br />
485<br />
CAVITY FIRE BARRIERS:<br />
To BS 476-20 and must resist the passage of flame and smoke <strong>for</strong> not<br />
less than ______<br />
490<br />
July 2001 Page 11 of 11
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