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Cover board

A cover board is a layer of rigid insulation or other flat material that is installed over the roof deck before the roofing membrane is applied. The purpose of the cover board is to provide a smooth, even surface for the roofing membrane and to protect the underlying insulation from damage.

Cover boards can be made from a variety of materials, including fiberboard, gypsum, perlite, and high-density polyisocyanurate. They are typically installed in a single layer, although multiple layers may be used for added protection or to achieve specific design requirements.

Using cover boards in roofing systems can enhance sustainability. Many cover boards are manufactured from recycled materials.

This contributes to energy efficiency. It not only supports environmental goals but also aids in minimizing operational costs by improving the overall thermal properties of buildings.
Some of the benefits of using a cover board in a roofing system include:

• Improved wind uplift resistance: Cover boards can help to improve the wind uplift resistance of the roofing system, especially in areas with high wind loads.
• Enhanced durability: Cover boards can help to protect the underlying insulation from damage caused by foot traffic, construction debris, and other sources of wear and tear.
• Increased thermal performance: Some types of cover boards have insulating properties, which can help to improve the overall thermal performance of the roofing system.

Overall, the use of a cover board can help to improve the performance and longevity of a roofing system, while also providing a smoother and more even surface for the roofing membrane to be applied.