Many components of roofing systems often go unnoticed, one of which is roofing felt. What is roof felt, and what part does it play in installation? Read on to learn more about the purpose of roofing felt, the many different types, and why every home can benefit from this roofing material.

What Is Roofing Felt?

Roof felt is a versatile material used in roofing. It has many names, including roofing paper, roofing tar paper, or roof underlayment. This material is made from a combination of asphalt and either fiberglass or organic fibers. Roofing contractors install roof felt between the roof deck and shingles. It has become an essential part of installations.

Is Roof Felt Waterproof?

While not entirely waterproof, the primary purpose of roof felt is to repel moisture and prevent it from entering your home. It’s designed to repel water rather than absorb it, so it can break down if wet for too long.

What Does Roofing Felt Do?

So, what is roof felt used for? Besides preventing water from entering your home, roofing felt is used as:

  • Ice repellant. Because it repels water, roof felt can offer extra protection against ice dams and damage.
  • Extra weather protection. Felt roofing paper protects against various weather conditions, such as wind and UV rays. It enhances your roof’s overall durability. 
  • Additional fire protection. Roofing felt contributes to meeting a Class A fire rating when used with shingles.
  • Assists with look and uniformity. Besides protection, roof felt also creates a smooth and uniform surface for your shingles, helping them lay flat and uniform.

What Is Roofing Felt Made Of?

There are a few types of materials roof felt can be made from, such as

  • Felt. Traditional roofing paper is made from organic fiberglass with an asphalt coating.
  • Synthetic. Synthetic roofing underlayment comes from polypropylene or other synthetic ingredients.
  • Wood structural panel and underlayment. This type of roof felt is for use under wood shingles or shakes.
  • Peel-and-stick underlayment. This self-adhesive roofing felt offers easy installation.

What Are the Different Weight Options for Roofing Felt?

Felt paper for roofing comes in two weight options. These options are based on the weight of 100 square feet of material. It indicates the felt’s thickness and durability.

15 pounds

This lighter roofing paper is best for roofs that can’t handle larger amounts of weight or have a steep pitch where water can run off easily. It’s more suitable for areas with mild weather conditions and provides basic protection, but it may be more susceptible to wear and tear.

30 pounds

Roof felt that weighs 30 pounds is for more heavy-duty projects. It’s ideal for areas with harsh weather conditions where additional protection is needed. It offers more resistance to wear and tear but adds more weight and stress to the roof.

Does My Roof Need Roofing Felt?

Roofing paper isn’t always used, but it has many benefits that outweigh the costs. It acts as a backup layer of weather protection under your shingles, ultimately extending the life of your roof deck.

Need help with roofing paper or other roof-related issues? Contact M&M Gutters! From inspections to installation, we provide a wide range of servicesto keep your roof looking its best. Visit our websiteto learn more about how we can take care of your home’s exterior.

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