Underlayments For Metal Roofing

There are several types of felt underlayment including both organic reinforced and inorganic reinforced.

Underlayments for metal roofing.

When hot roof construction is done a roof with no ventilation a breathable underlayment is recommended. The traditional and most common material used for roof underlayment on a steep slope metal roof is non perforated asphalt impregnated felt underlayment. It s about 10 times lighter than felt so it goes up faster and puts less weight and stress on your roof. Shingles for example are just the first line of defense against elemental damages.

Make sure the product is designed to be used under metal. Synthetic underlayment for metal roofing if you still use 30 roofing felt you re throwing your money away. There are two types of underlayment for a metal roof felt paper and synthetic each with its pros and cons. Underlayment is the final weather barrier between your finished roofing and your roof s raw plywood.

It serves as a moisture barrier as well as a slip sheet. It s a better and more advanced metal roof underlayment. Synthetic underlayment is a roofing accessory created by weaving spinning together polypropylene or polyethylene and a polymer to form an all over protective barrier to put between the roofing material and the roof deck. In addition to choosing roofing materials you should also consider roofing underlayment.

Once again this is used on cold roof construction. Synthetic underlayment is a newer innovation that is taking over the metal roofing industry as a better more advanced replacement for felt underlayment. 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. The temperature under a metal roof can get very high.

This type of underlayment is critical to a quality roof installation. Synthetic underlayment heat and uv resistance. Traditionally metal roofs have used standard 30 pound felt paper underlayment.