Third-party Assurances
(3)
Select an approval to download it as a PDF.
Available from your OLS librarian
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Rooflights, cladding
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Dri-seal semi-rigid roofing
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Roofing and ventilation products for the construction industry
What are Keyfiles?
Keyfiles are in-depth data sheets providing detailed technical information for a selection of
relevant products manufactured or distributed by particular companies. These are specifically
authored to assist the specifier in product selection and include product descriptions and photographs.
These data sheets are placed in Keyfile Libraries. More information on the Office Library Service is
available from
www.theNBS.com.
Requesting documents from your OLS Librarian: