List of featured suppliers of ROOFING UNDERLAYS PITCHED ROOF MEMBRANES NSAI AGREMENT CERTIFICATE HOLDERS (Ireland) Formerly National Irish Agrement Board (NIAB) on Building Products Index
Roofing underlays and pitched roof membranes are materials that are used in the process of constructing a building's roof. These materials are certified by NSAI Agrement Certificate Holders, which is an organization in Ireland that has been previously known as the National Irish Agrement Board (NIAB). NSAI Agrement Certificate Holders provide testing and certification services for building products and materials, ensuring that they meet the necessary standards for safety and quality.