Fiberglass is one of the best material for insulation. Fiberglass insulation is manufactured in two forms, batt rolls and rigid boards. Fiberglass mat are more commonly used in residential construction, while rigid boards are used as a substrate for low-slope roof applications.
Rigid fiberglass insulation boards are composed of inorganic glass fibers and were first used in commercial roofing systems in 1941. No surface treatment is provided on the bottom of the insulation, while the top surface is faced with a glass fiber reinforced, asphalt kraft paper. The top surface treatment offers some impact resistance, while also providing a suitable mopping surface for conventional built-up roof applications.
Fiberglass insulation is dimensionally stable and will not expand with heat or swell when exposed to moisture. Additionally, fiberglass is flexible, chemically inert, and fire resistant. Its flexibility will allow the insulation to conform to minor deck irregularities when compared to other rigid, less flexible insulations. Fiberglass may be used as a thermal barrier over steel roof decks because of its excellent fire-resistance properties.
Fiberglass insulation is most prevalently used under built-up and modified bitumen roof systems. Its use with single-ply roof systems is rather limited due to its low compressive strength and the incompatibility of its asphalt kraft paper and pvc based single-ply sheet membranes. Because of its low compressive strength of 12 pounds per square inch, fiberglass insulation may not be suited for use on roofs subjected to concentrated or extensive foot traffic. However, fiberglass will accommodate normal maintenance traffic.
This article is from fiberglass chopped strand mat.
没有评论:
发表评论