What is the method of attaching rigid board insulation to nailable decks?

The method of attaching rigid board insulation to nailable decks is primarily done through mechanical fastening. This approach utilizes various types of fasteners, such as screws or nails, to securely hold the insulation in place on the roof deck. Mechanical fastening is effective in providing stability and ensuring that the insulation maintains its position, even in adverse weather conditions or during installation of subsequent roofing materials.

Other methods of attachment, such as using adhesives or glue, while applicable in certain scenarios, do not provide the same level of reliability and structural support for rigid boards on nailable decks. Stapling may also be less effective for this application since it may not provide the same holding power as mechanical fasteners. Therefore, mechanical fastening is the preferred method as it offers a robust and dependable solution for securing rigid insulation on nailable systems.