Jun 30, 2021

Understand The Types of Roof Underlayment

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!

roof install

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.

roof install

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.

installing a roof

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.

Warranty Concerns

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.

roof install

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.

See Our Roofing Projects

Roof Installation Reviews:

"I can highly recommend Lindus Construction for roofing. The crew was fast, careful and produced a stunning end result. Good communication meant we were able to evaluate and implement changes as needed. Very pleased with the services and people involved. Thank you!"

Martin H.
Lake Elmo, MN
June 28, 2022

"My wife and I are so thrilled about the new roof shingles you installed on our home. They are absolutely gorgeous and could not possibly look any more amazing than they are.  The LeafGuard® team also did an outstandingly professional job installing the gutter system and had a couple of recommendations on a gutter and downspout placement that really functions well AND makes the house look astounding."

Joseph R.
Minneapolis, MN
June 27, 2022

"Quality work. Great clean up. Constant updates on progress. Responsive to questions. Great experience from beginning to end."

Andy N.
Oakdale, MN
June 24, 2022

"I have spoken highly of Lindus and their work to many, many people and the people that are familiar with my home are delighted to see the final outcome! I would call Lindus for any future home improvements. Their care and quality are excellent!"

Pat M.
St. Paul, MN
June 22, 2022

"I was extremely impressed with Lindus from the very first phone call to get an estimate on a new roof for my home. All of the customer service people, Brittany and Donna, to Jake in sales, Wayne and Brock with carpentry, Hunter on gutters, Tucker as project manager and the entire crew that did the roofing. Everybody was very professional, friendly, and great communication from beginning to end. I have recommended Lindus to others! Thank you so much!"

Pam B.
Vadnais Heights, MN
June 6, 2022

"The roof looks beautiful!! The framing and the tiles are great and the gable vents look great too. I also *really* appreciate the clean up your folks did. Not all roofers are as tidy and this was VERY much appreciated."

Becca N.
Minneapolis, MN
May 3, 2022
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