When homeowners think about materials for roofing projects, they almost always focus their attention on the shingles. While shingles are an important component of roofing, there are others that play a large role in the roof’s lifespan. One such component is the roof underlayment. Here’s what you need to know!
What Is Roof Underlayment?
Roofing underlayment is installed between the roof deck and the shingles. Its purpose is to add additional protection against leaks and damage from rain, wind, and snow.
What Is Felt Roofing Underlayment?
Felt roof underlayment, often referred to as roofing felt underlay, is made from natural materials, such as plant fibers, wood, and polyester. It is available in either 15-pound or 30-pound weights. Between the two, 30-pound roofing is heavier and less likely to rip when being installed or during major weather events.
What Is Synthetic Roof Underlayment?
Synthetic roofing underlayment is manufactured from strong polymers in order to be long-lasting. Popular synthetic roof underlayment’s within the marketplace are Tiger Paw™ and Deck‑Armor™.
Learn More About Tiger Paw™ Synthetic Underlayment For Roofs From GAF:
Synthetic Roof Underlayments Vs. Felt Underlayment
Synthetic roof underlayment cost more than felt underlayments. This makes roofing felt underlay ideal for homeowners trying to get their project done as cheaply as possible.
Synthetic roofing underlayment is harder to tear and can hold up against being walked on during installation. Felt underlayment can be compromised if not carefully installed or if it is exposed to high wind speeds.
Ease of Installing Underlayment:
Contractors tend to prefer working with synthetic roof underlayment because it installs quicker than felt does. Roofing felt underlay also weighs more, making it more difficult to transport to the top of homes. In addition, felt underlayment can be slippery to work with and has more seams.
Some major roofing manufacturers offer lesser or no warranties if felt underlayment is used. This is because its quality does not match that of synthetic underlayment.
Exposure to Mother Nature
Another reason roofing felt underlayment is so difficult to work with is that should not be left exposed for long periods of time. If it is, felt underlayment can dry out and the oils within the material can leak out. Either of these scenarios can negatively impact the underlayment’s ability to hold up against snow and rain. If the roof felt gets wet during installation, it can become wrinkled. When this happens, it is more difficult for the shingles to lay flat.