Everything You Need to Know About Tile Roof Underlayment

tile roof underlayment being applied to a roof

Although asphalt shingles have long been the most popular type of roofing in the United States, tile roofs are coming to the fore as a stylish alternative.

Clay and slate tiles provide homes with an authentic southwestern look, while concrete tile resembling clay or slate is a more budget-friendly option. No matter which type of tile you choose, you must consider what is underneath to protect your roof and the rest of your home from damage.

What is Tile Roof Underlayment?

The industry standard for concrete tile roofing requires that one or two layers of underlayment be applied to roofs with slopes of 33 percent or greater. While the tiles should be seen as the first line of defense against leaking in the home, the roof underlayment is an important secondary barrier.

Tile roof underlayment comes in several different forms.

  • A very popular option for many roofers is 30-pound felt paper, which is budget-friendly and ideal for most uses.

  • Non-bitumen synthetic underlayment is another popular option for some roofers because of its strength.

  • Rubberized asphalt underlayment is more expensive than the other two options but may offer better waterproofing benefits.

Why Do You Need This Roof Underlayment?

It protects your roof from water should a tile break in a storm or if heavy winds expose nail holes. Because tiles are not sealed at all corners when they are laid and can become brittle and crack over time, this is an important additional moisture barrier that your home needs.

How Long Does Tile Roof Underlayment Last?

If tile roof underlayment is installed correctly by a professional service, such as Boyce’s Roofing & Repair, it should last for years. Traditional felt paper can last for at least two decades and some synthetic options should last even longer. Because synthetic variations typically have the best tear ratings, they can stand up to plenty of weather events and the heavy roofing tiles. Many come with warranties to give homeowners peace of mind.

Does a Leaky Roof Require New Roof Underlayment?

If your roof is leaking, the underlayment is probably compromised in at least one spot. Old underlayment should be removed and new underlayment placed if it is visibly broken down beneath your tiles or if it has outlived its lifespan. A roofing professional can inspect your roof to determine the exact cause and extent of the damage.

Clearly, underlayment is a necessary feature of almost any tile roof. Although it is unseen, it provides a mighty barrier against moisture, protecting your roof, attic and entire home from costly damage. To schedule an appointment with Boyce’s Roofing & Repair, call (760) 800-6040.