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Technical reference for specification

This page is the gateway to information to help you design and build using Gerard Roofs products.

This technical reference area is in three sections that correspond to those in the latest Gerard Roofs Specification Manual. The tiles on the right will take you to the different categories of information.

If you’d like a complete copy of the latest Gerard Roofs Specification Manual, you can download a pdf here or phone Gerard Roofs on 0800 104 868 and have a hard copy sent to you. 

Design considerations
Details of what to keep in mind when designing with Gerard Roofs. Product properties, dealing with hostile weather environments and more.
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Design considerations
Substrate & Installation Overview
Uncover the specifics of the sub-structure immediately below a Gerard roof; rafters,


battens, underlays and fixings are covered here.
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Substrate & Installation Overview
Standard Roof Details
The main CAD details and specifications you’d need to design with certainty, laid out to correspond to Gerard Roofs’ specification manual.
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Standard Roof Details
Document library
Helpful documents of all kinds – electronic versions of our technical notes, material safety data sheets, brochures, product renders and more.
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Document library

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Gerard Certified Roofers Only

Gerard Certified Roofers can access their individual secure transaction portal via the button below.

This is an entirely different site only accessible with a preassigned GCR code and login.

If you are not a Gerard Certified Roofer and are interested in becoming one please contact Gerard Roofs on 0800 104 868 to find out more.

Products & Specs
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Technical Reference
Design Considerations Substrate & Installation Overview Standard Roof Details
CAD Details
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