If it works as well as synthetic, why not use those savings on other areas of the house? During those times when specific requirements call for one or the other, your decision has been made for you. Compared to felt, synthetic roofing underlayment is: Tough; Fast to install; Safe; Repels water; Synthetic underlayment has a tough and durable construction with an extremely high tear strength compared to felt. Grace Ice and Water Shield HT 36 in. Synthetic underlayment started gaining popularity in the last decade. Synthetic underlayment will always be lighter than felt underlayment. The price difference is mostly due to the components of each underlayment, as the fiberglass in synthetic underlayment gives it superior resistance to tearing and increased stability as opposed to felt. Synthetics also offer better foot traction than asphalt felt … Roll Self-Adhered Roofing Underlayment (225 sq. In our industry, there are two main varieties of underlayment: felt paper and synthetic. Long-lasting polymers give synthetic underlayment its strength and longevity. Lighter than felt, synthetic underlayment is just as easy to work with and is just as durable – if not more so – than felt … This smart and competent ArmorLay 25 Synthetic Roof Underlayment is the most useful thing for every house roof. 36-in x 71.75-ft 200-sq ft Felt Roof Underlayment from Lowes. It’s thinner, lighter, and a single roll can cover much more area than a similarly sized roll of felt. It depends on who you ask. from dampness. Glenda Taylor is a contractor and a full-time writer specializing in construction writing. Depending on the size of the roof, the difference in cost could be significant. Over the last 10-15 years, the roofing underlayment market has undergone a major shift from traditional asphalt felts to synthetic underlayments. When to Use Synthetic Underlayment. DiamondDeck is a synthetic, scrim-reinforced, water-resistant underlayment that can be used beneath shingle, shake, metal or slate roofing. Pro guard 20 synthetic underlayment is up to 12 times stronger than 15 felt. In contrast to regular roof felt, synthetic underlayment is typically fabricated from man-made polypropylene and polymer, substances that are lightweight, highly water-resistant and very durable. Synthetic underlayment is where technology meets traditional felt. And many roofers still use felt paper because it was the material they grew up using and working with. Synthetic roof underlayment is extremely durable. When buying roofing felt, your only options are thickness and whether you want asphalt-infused or fiberglass-infused, both of which offer similar benefits. I had a new roof done in 2013 and the roofing contractor asked me if I was familiar with the new synthetic underlayment. Applications are similar for both materials and both stand up to the elements. info@warnerroofinginc.com It’s also lighter, easier to install and contributes to safe working conditions for your crew. However, companies such as Interwrap have recently introduced new products that offer great durability and competitive prices. Synthetic underlayment is more susceptible to wicking at laps than asphalt felt underlayment, which can lead to moisture damage to the roof. For the most part, though, felt paper and its synthetic counterpart both do a great job of weatherproofing the decking before shingles can be applied. 360-694-0249 It also acts as a weather barrier until the shingles can be installed. For these reasons, NJ roofing contractors increasingly … Synthetic Roofing Underlayments SYNTHETIC VS. Without an underlayment, the roof and rest of the home are exposed to the elements, which include not only wind and moisture but also chemicals and resin. 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