Fire Rated Roof Underlayment

Synthetic underlayment like an ice and water shield is quite a bit lighter rolls out in large rolls and is made of polypropylene fiberglass polyethylene and.

Fire rated roof underlayment.

1 4 spans flute widths up to 2 5 8. Versashield fire resistant roof deck protection helps to provide the best protection against fire spread and penetration by upgrading the ul fire classification of almost any type of roof. Polyglass creates self adhered fire resistant roof underlayment the polystick xfr provides water and fire proofing for high temperature applications including metal roofing. In some jurisdictions roof assemblies are required to be fire resistant.

Firestone clad gard underlayment s provide an ideal moisture barrier between the roof deck and the adjacent metal system. Underlayment must also act as a secondary weather barrier in case the roof fails. For roof slopes of four units vertical in 12 units horizontal 33 percent slope or greater underlayment shall be a minimum of one layer of underlayment felt applied shingle fashion parallel to and starting from the eaves and lapped 2 inches 51 mm fastened only as necessary to hold in place. Fr 10 fire resistant slipsheets enhance the overall fire performance of many conventional commercial roof systems including metal roofs.

However in some jurisdictions roof assemblies are also required to be fire resistant. However contractors now recognize the benefits of synthetic underlayment for metal roofing particularly when it comes to its tolerance to heat and ultraviolet uv radiation. 1 4 dens deck roof board. Traditionally metal roofs have used standard 30 pound felt paper underlayment.

First class a fire rated assemblies appear to require metal roofing directly over class a rated underlayment over the roof deck with no ventilation space between the metal and underlayment. Versashield fire resistant roof deck protection is a key part of the gaf lifetime roofing system 1 and has earned the good housekeeping seal. Densdeck roof boards can replace any generic type x gypsum board in any roof assembly in the ul fire resistance directory under the prefix. It also can t protect against any water that flows upward toward the top of your roof like ice and water dams or heavy rain and wind storms.

Providing a skid resistant surface nail resealability high temperature resistance corrosion protection weatherproofing during installation and more clad gard is a smart way to protect your metal roofing investment. Shop the lifetime roofing system here. I have a few questions about standing seam metal roof assemblies.