Roofing Underlayment

Many think that the shingles or metal roofing is the only layer of protection on your roof but there is another key to protecting the outside elements from destroying your home. This protection barrier is called the underlayment and it is found between the roof deck and the roof covering. This second layer of protection helps fight against mother nature and to withstand the rain, snow, and winds.


There are several types of underlayment, but the most popular ones are felt and synthetic. Each had their own advantages and disadvantages. What type you decide to use will depend on your location, the supply and demand of your stores, the layout of your roof and most of all your budget. Double check with the manufacture of the roofing material as your warranty may not be valid if you use the wrong recommended underlayment.

felt underlayment paper

This type of protection has been around for years and is one of the oldest types of underlayment. It contains saturated paper or fiberglass mat with asphalt. There are different levels of felt with No. 30 being stronger, tougher, and less likely to tear during installation.

If you are budget conscious than felt is the way to go. Keep in mind though there are disadvantages when using felt. It cannot be left exposed to the outside elements for more than a few hours depending on the weather as it could dry out or if it gets to hot oil will start to seep. This will have a huge impact on the durability of the felt to fight against any moisture if the roofing fails. The felt can absorb water if exposed to rain during the install process therefore roofing needs to be installed almost immediately to ensure the best possible protection. 

This product has enhanced water-resistance material made from polymers, which provide strength and longevity. Because it is made of plastic material, this underlayment has strong resistance to the mold growth. Like the felt underlayment, contractors can customize their synthetic underlayment. There are many benefits to installing a synthetic underlayment to your roof. It is extremely durable and is suitable for exposed UV and moisture if there is a delay in your roof covering. During the installation when foot traffic is high on felt it tends to tear easy, but the synthetic underlayment can handle heavy boot traffic. The rolls of synthetic underlayment are much lighter in weight therefore is easier and faster to install plus you will get more material on the roll. The disadvantage to using synthetic underlayment is higher cost compared to felt. Upfront the investment may be high on the wallet, however, in the end it could save you money. There is no price on having a peace of mind knowing the roof over your family’s heads is protected from the elements that surround the home.

Synthetic Underlayment
Many think that the shingles or metal roofing is the only layer of protection on your roof but there is another key to protecting the outside elements from destroying your home. This protection barrier is called the underlayment and it is found between the roof deck and the roof covering. This second layer of protection helps fight against mother nature and to withstand the rain, snow, and winds.
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