Standards and approvals
Rockwool DuoRock roofing boards comply with the requirements of BS EN 13162: 2001, ‘Thermal Insulation products for buildings Factory made mineral wool (MW) products specification.’
European Union of Agrément (UEAtc) DuoRock roofing boards have been assessed by the BBA to the UEAtc Technical guidelines MOAT No 50: 1992 ‘Thermal insulation systems intended for supporting waterproof coverings on flat and sloping roofs’.
DuoRock roofing boards have been tested for the effects of mechanical stress and have achieved Classification B, ‘Roof only accessible for purpose of maintenance. May be used without any restrictions.’
The Boards have also been assessed for cantilever and free spanning capabilities.
Factory Mutual
DuoRock (Plain) roofing boards are Factory Mutual approved for Class 1 insulated steel deck constructions. Approval Report No. J.I. 3010637
Strength
DuoRock Roofing Boards are strong enough to bear normal foot traffic associated with installation and routine maintenance inspections of the roofing system.
Thermal Conductivity
The Thermal Conductivity (λ) of DuoRock roofing Board is 0.038 W/mK.
Fire
Rapid spread of fire not only destroys buildings, but can cost lives too. Smoke and fumes can hinder escape and rescue. The specification of insulation materials should consider each characteristic as well as any tendency for toxic emissions to contaminate water courses and the environment.
DuoRock roofing boards offer a high level of Fire safety and are classified as non-combustible to Approved Document B of the Building Regulations and LPCB (Red Book ref. 022e).
LPCB Approvals
Roofing constructions incorporating DuoRock roofing boards have achieved the highest possible classification to LPS 1181:Part 1 (i.e. EXT-A). This was accomplished by successfully undertaking and passing the Part 1 test for Reaction to Fire and the more onerous LPS 1208 Resistance to Fire test.
Rockwool roofing boards are the only insulation products to have achieved this classification with respect to built-up warm flat roofing constructions.
Insurance requirements for protected zones
Systems that have only achieved EXT-B Grade are not suitable for use in roof areas adjacent to ‘protected zones’ as defined by the ‘LPC Design Guide’. Appendix B, LPS 1181: Part 1 outlines three specific levels of Grade EXT-A fire resistance requirements for compliance with insurance industry standards within ‘protected zones’.
Building Regulations Approved Document B
Where a flat roof is to be used for escape purposes, then the construction must achieve a minimum fire resistance of 30 minutes integrity and insulation, i.e. EXT-A30.
Acoustics
DuoRock Roofing Boards provide effective sound insulation, an essential requirement where commercial or industrial operations generate noise, at levels which could be harmful to the health or efficiency of building occupants, or present environmental nuisance.
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