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DOW BUILDING SOLUTIONS - At-A-Glance Guidance On Inverted Roof Systems Released

An insight into latest guidance relevant to inverted roof systems has been released by JPA Technical Literature Ltd to aid designers, specifiers and installers in their decision making.

The summary – which has been made available at by insulation manufacturer Dow Building Solutions – provides highlights of three key documents relevant to inverted roof design in one, easy to use guide:

• European Technical Approval Guidance 031 (ETAG 031), which was issued at the end of 2010 to help ensure consistent standards of assessment of inverted roof systems.
• BBA Information Bulletin No. 4, which emphasises the need to adjust calculated U-values to take account of the cooling effect of rainwater, as well as the importance of correct drainage.
• BBA DataSheet No. 40/10, which describes the methodology to be adopted when analysing the results of thermal conductivity testing of insulation materials to determine a declared thermal conductivity value (λD).

“Roof designers and contractors are very familiar with the inverted roof system, but it is important they bear in mind the latest guidance in order that they can make appropriate corrections to calculated U-values and be aware of the latest recommendations when it comes to drainage, for example,” said John Potter of JPA.

“Those needing to design and build inverted roof systems in accordance with the European Union's Construction Products Directive certainly need to be up to speed with ETAG 031 - it provides a basis for preparing European Technical Approvals (ETAs) and only systems prepared in accordance with ETAG 031 will satisfy the Essential Requirements of the Directive.”

To download a full copy of JPA Technical Literature’s paper, “A review of recent guidance on inverted roof construction” with full references supplied please email below.

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News Categories:
Inverted roof systems Roof insulation products Insulation products

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