Roofing Felt VS Synthetic Underlayment: Which Should I Use?

roofing felt vs synthetic underlayment

When it comes to roofing felt vs synthetic underlayment, there are a few things you need to consider. Both roofing felt and synthetic underlayment have their pros and cons, so it is important to weigh them all and keep on mind to contact with professional roofing contractor before making a decision. In this blog post, we will discuss the differences between roofing felt and synthetic underlayment, as well as their benefits and drawbacks. By the end of this post, you should have a good idea of which type of roofing underlayment is best for your needs.

What is Roof Underlayment?

Underlayment is a layer of material that is installed between the roofing deck and the shingles. This layer provides additional protection against water and wind damage, as well as helps to insulate the home. There are two main types of roof underlayment: roofing felt and synthetic underlayment.

What is Roofing Felt?

Roofing felt is a type of asphalt-saturated paper or fiberglass mat that is used as an underlayment for shingle roofs. It is typically made from recycled materials, such as paper, sawdust, or wood fibers. Roofing felt has been used for many years and is a trusted method of protecting homes from the elements.

What are The Benefits of Roofing Felt?

Roofing felt is a durable and long-lasting material that provides excellent protection against water and wind damage. It is also very affordable, making it a great option for budget-conscious homeowners.

What are The Disadvantages of Roofing Felt?

One of the main disadvantages of roofing felt is that it is not as effective at insulating the home as synthetic underlayment. It can also be difficult to install, especially on larger roofs.

What is Synthetic Underlayment?

Synthetic underlayment is a type of roofing material that is made from polypropylene or polyethylene. It is typically lighter and thinner than roofing felt, but it is also more durable and water-resistant.

What are the Advantages of Synthetic Underlayment?

The main advantage of synthetic underlayment is that it provides better insulation than roofing felt. It is also easier to install, and it can last up to twice as long as roofing felt.

What are the Disadvantages Of Synthetic Underlayment?

The main disadvantage of synthetic underlayment is that it is more expensive than roofing felt. However, it is worth the extra cost for its improved performance and longer lifespan.

Felt underlayment vs. synthetic underlayment: Which is better for your roof?

The answer to this question depends on your specific roofing needs. If you are looking for a more durable and water-resistant underlayment, then synthetic underlayment is the better option. However, if you are on a budget, then roofing felt may be the better choice. No matter which type of underlayment you choose, make sure to install it correctly to ensure the best possible performance from your roof.

Which Roof Underlayment Weighs More?

Felt roofing underlayment is typically made from asphalt-saturated organic materials. This makes it much heavier than synthetic roofing underlayment, which is usually made from fiberglass or polyester.

Which Roof Underlayment does Last Long?

Synthetic roofing underlayment can last up to 20 years, while roofing felt only has a lifespan of about five to seven years.

Which Roof Underlayment is Safer to Work On?

roofing felt is much more dangerous to work with because it is very flammable. Synthetic roofing underlayment is not as flammable, making it a safer option.

Which Roof Underlayment Costs More?

The cost of roofing felt and synthetic roofing underlayment can vary depending on the manufacturer and the specific product. However, synthetic roofing underlayment is typically more expensive than roofing felt.


If you are a homeowner considering installing or replacing your roof, it is important to know the options available for underlayment. Two popular choices are roofing felt and synthetic underlayment. Roofing felt is made of organic materials like wool or paper that can be asphalt-impregnated or treated with bitumen. Synthetic underlayment is made of manmade materials like polypropylene or polyethylene. Each type has its own advantages and disadvantages that should be considered before making a decision. Be sure to consult with a professional roofer in Texas,USA to get the best advice for your particular situation.


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