Underlayments For Metal Roofing

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.

Underlayments for metal roofing.

The traditional and most common material used for roof underlayment on a steep slope metal roof is non perforated asphalt impregnated felt underlayment. Underlayment must also act as a secondary weather barrier in case the roof fails. It s about 10 times lighter than felt so it goes up faster and puts less weight and stress on your roof. The synthetic type is a relatively newer technology and is made by spinning together polyethylene or polypropylene with a polymer.

Our synthetic underlayment is 20 times stronger than felt it won t rip or tear and it won t buckle when wet. Traditionally metal roofs have used standard 30 pound felt paper underlayment. The temperature under a metal roof can get very high. 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.

It serves as a moisture barrier as well as a slip sheet. Once again this is used on cold roof construction. There are two types of underlayment for a metal roof felt paper and synthetic each with its pros and cons. This type of underlayment is critical to a quality roof installation.

Underlayment is the final weather barrier between your finished roofing and your roof s raw plywood. There are several types of felt underlayment including both organic reinforced and inorganic reinforced. In addition to choosing roofing materials you should also consider roofing underlayment. Synthetic underlayment is a newer innovation that is taking over the metal roofing industry as a better more advanced replacement for felt underlayment.

It s a better and more advanced metal roof underlayment. When hot roof construction is done a roof with no ventilation a breathable underlayment is recommended. Synthetic underlayment heat and uv resistance.