Is Felt Paper Required Under Metal Roofing

Fifteen pound or heavier felt underlayment is required by code in some areas.

Is felt paper required under metal roofing.

With metal roofing its also a good idea to put a layer of red rosin paper between the felt or ice water shield and the metal that way it wont potentialy stick to it and cause oil canning and would allow for expansion. Felt paper or not under metal rofing. The traditional and most common material used for roof underlayment on a steep slope metal roof is non perforated asphalt impregnated felt underlayment. The addition of a slip sheet will increase the cost.

Traditionally metal roofs have used standard 30 pound felt paper underlayment. What types of underlayment are available for metal roofing and which is the best choice for your design or installation. There are several types of felt underlayment including both organic reinforced and inorganic reinforced. 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.

Underlayment must also act as a secondary weather barrier in case the roof fails. The roof deck should be sound and level before laying the underlayment.