The underlayment is a critical part of the roof; it acts as a moisture barrier. With the right underlayment, the roof deck is protected from moisture damage even if it rains or snows. Below is a brief overview of some of the roofing underlayment available on the market today.

Asphalt-Saturated Felt

As the name suggests, this underlayment is manufactured from a mixture of felt material and asphalt. The felt forms the base material, but it is saturated with asphalt to give it some water-resistant properties because felt alone is not water-resistant. Asphalt-saturated felt comes in different thicknesses or densities.

One of the best things about this underlayment material is that it adds some stiffness to the roofing deck. The increased stiffness improves the roof's structural strength, which makes it more resistant to things like hailstones. The degree of stiffness depends on the density of the underlayment.

Rubberized Asphalt

The main material in rubberized asphalt is rubber. The rubber may be reinforced with different materials such as fiberglass, asphalt, polyethylene, or a polymer film. Thus, some so-called rubberized asphalt does not contain any asphalt at all. Rubberized asphalt, which is highly flexible, is installed on the roof using appropriate adhesives.

One of the advantages of rubberized asphalt is that it is highly flexible. The flexibility means it is not easily affected by temperature fluctuations since it can easily expand and contract as the weather changes. The exact properties of rubberized asphalt depend on the material used to reinforce the rubber. For example, asphalt adds structural strength and polymers increase resistance to damage.

Non-Bitumen Synthetic

This form of underlayment does not contain asphalt, hence the name. In this case, the underlayment is made from synthetic materials, such as fiberglass or plastic (such as polypropylene). More and more roofs are being constructed with synthetic underlayment.

Synthetic underlayment is lightweight, especially when compared to the underlayment that contains asphalt. The lightweight nature of the underlayment means they do not add much weight to the roof, which is good for the structural integrity of the roof. Despite their lightweight nature, synthetic underlayment is strong enough to withstand various forms of damages. Synthetic underlayment is also perfectly waterproof, doesn't support fungal growth, and can perform well in different types of weather.

Choose the right underlayment for your home and have it installed by a professional roofer. Call a business like JC Roofing & Insulating to get started. Don't forget that even a good underlayment might not protect your house much if it is unprofessionally installed.

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