RIBA Approved National Building Specification (NBS)
 Marvin Architectural's RIBA approved National Building Specification (NBS) provides regularly updated information on Marvin's main product lines. Information on the options available on each product and the performance standards passed are detailed.
The NBS are provided in the standard specification formats below and may also be accessed at www.theNBS.com
L10 Wood Windows
L10 Composite Windows
L20 Swinging Doors
L20 Sliding Doors
For additional information or queries please contact our dedicated technical design department:
UK
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Tel: 0208 - 569 8222
Email:
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Ireland
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Tel: 045 - 401 000
Email:
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Architects/Commercial 
