What type of felt on roof

These products are usually made from long-lasting polymers, which provide added strength and longevity. Synthetic roofing underlayment materials are not standardized, so different manufacturers may make their products differently, and therefore may have different levels of performance. Be sure to do your research and talk with a trusted contractor who can help guide you in selecting the right roofing materials to protect your home.

There are four main advantages to installing synthetic roof underlayment rather than felt. Compared to felt, synthetic roofing underlayment is:. Synthetic roof underlayment is extremely durable. Many synthetics are competitively priced, but when compared to felt, the main drawback of synthetic roofing underlayment is the cost. The upfront investment in higher quality roofing materials, however, could save you money down the road. Synthetic roofing underlayment has many advantages over felt and may be a worthwhile investment to protect your roof and home from the risks of water and moisture infiltration.

Learn more about our selection of roofing underlayment products and find an independent roofing contractor in the Owens Corning Roofing Contractor Network near you. Individual product weights may vary. Getting the color and shape of shingle you always wanted is a great way to express your individual personality and add real value.

Owens Corning. Planning Your Roof. Roof Damage. Hiring a Contractor. Roofing Blog. Components Explore Components. Rubberized Asphalt Rubberized asphalt are like sheets of rubber when installed and while it does have the word asphalt in its name, it has little to no asphalt content.

Non-Bitumen Synthetics Modern roofs are likely installed with non-bitumen synthetic underlayment. Horizontal Slideshow. All rights reserved. Advanced Roofing Inc.

Please leave this field empty. Roofing felt is sold in rolls and the product label will give information on the area contained. All rights reserved. The information on this website is subject to change without notice. IKO assumes no responsibility for errors that may appear on this website. IKO strives to accurately reproduce the screen images of the shingle swatches and house photos shown.

However, due to manufacturing variances, the limitations of your monitor resolution and the variation in natural exterior lighting, actual colors may vary from the images you see.

To ensure complete satisfaction you should make final color selections from several full size shingles and view a sample of the product installed on a home. Edge Metal Laps Felt underlayment should overlap the edge metal at the eaves and be overlapped by edge metal on the rakes.

A number of ASTM standards exist which offer specifications for asphalt-saturated felt. Loss of Volatiles. Over time, volatile compounds in the asphalt will dissipate, and the underlayment will become more fragile and moisture-absorbent. This will happen more quickly when felt is exposed to heat.

The source of heat may be a warm climate, a particular type of roof-covering material, or poor roof-structure ventilation. Anywhere felt underlayment is exposed directly to sunlight, UV radiation will accelerate its deterioration.

These poorly-bonded shingles were attached with staples on a home located in a high-wind area. Installation Damage.

Rubberized asphalt underlayments are manufactured to meet different requirements: They may have polyethylene or polyester bonded to the upper surface to provide non-skid and weather-resistant qualities. They may have a polymer film bonded to the weather surface to improve moisture resistance.

They may have a mineral coating on the weather surface. Polymer-Modified Bitumen The terms "modified bitumen" is often used when referring to asphaltic roofing materails. Molecules in cross-linked polymers actually bond to each other at the atomic level; they actually share atoms, which greatly increases the strength of the material. Selvedge Edge Rolls of rubberized asphalt underlayment may come with a selvedge edge along one side of the roll.

These synthetic polymers are also used to make a huge variety of other types of products, from food-storage containers and rope, to long underwear. To date, there are no applicable ASTM standards for these products. Use of these underlayments may void some manufacturers' material warranties for certain roof coverings such as asphalt shingles.

Wicking can be more of a problem than with felt underlayment. Installation along the roof eave is different with some types of synthetics. Although companies who manufacture synthetic underlayment may also manufacture similar-looking housewrap, housewrap does not meet roofing underlayment requirements.

Housewrap installed as underlayment is a defective installation. Underlayment is usually thicker than housewrap. In the photo above, you can see the difference between the two.