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Felt vs Synthetic Underlayment

One of the most important things you’ll need to understand when getting a replacement is the various roofing materials that go into your roof. They do, after all, significantly affect the price. Every homeowner has to be aware of the materials they will be paying for because a roof is a significant investment. The underlayment of your roof is one of these crucial roofing components. You’ll learn there are two typical types of underlayment used for residential roofing through your investigation. The question is, though, which is the best. By the end of this post, you will know what roof underlayment is, what varieties there are, and how they compare in terms of important factors like price.

What is a roof underlayment?

The roofing material between your roof decking and your shingles is called a roof underlayment. It adds a layer of weather protection and is put on your roof decking. There are two varieties of roof underlayment, felt and synthetic underlayment. The more traditional underlayment is felt, which is offered in rolls weighing 15 and 30 pounds. The main distinction between the two kinds of felt underlayment is that the 30 lb version is thicker, stronger, and less prone to tearing than the 15 lb version. For over 20 years, polyethylene or polypropylene has been used to make synthetic underlayment, which is woven or spun from these materials. Both underlayment kinds serve a purpose and have a place in the roofing sector. However, there are some important comparisons to keep in mind when deciding which one you want on your roof.

Felt underlayment vs. synthetic underlayment

You should analyze a product’s weight, cost, and other factors before selecting the underlayment for your roof. Let’s compare felt underlayment and synthetic underlayment side by side.

Which roof underlayment weighs more?

Compared to synthetic underlayment, felt underlayment weighs more. You probably don’t consider the material’s weight to be a significant contrast. However, the cost of labor for replacing your roof will be impacted by the weight of your roof underlayment. The heavier product increases labor costs for one key reason. Compared to synthetic underlayment, felt underlayment has less material per roll because it is heavier roofing material. As a result, you end up needing more of it, which requires more time and labor to install on your roof and get up a ladder. Even though it won’t significantly increase your labor costs, it’s still something to keep in mind.

Which roof underlayment is more durable?

Any time you install a new roof, you hope that it will withstand the elements and endure for many years. Thus, synthetic underlayment is more resilient than felt underlayment in terms of durability. Underpayments made of felt are far more likely to rip in strong gusts while being installed. Additionally, synthetic underlayment holds nails more securely and deflects water rather than absorbing it. When exposed to moisture or water, felt underlayment can absorb it and become wrinkled. Because of this, shingles must be put in as soon as the felt underlayment is put down. If there’s one thing to remember from this section, it’s that synthetic underlayment gives your roof more strength and better weather protection.

Looking for a professional to do your roof underlayment, or have further questions? Contact a qualified roofer near you to learn more.

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