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Best Underlayment for Tile Roofs in Arizona

Whether you’re a roofer, building and construction contractor, or a potential homeowner, searching for the best roofing underlayment requires some market savvy. Whether it is underlayment for tile roofing or metal roofing, you need to have the right information.

In this post, we’ll equip you with the comprehensive knowledge and details of what you need to get the best underlayment for your tile roof. Even if you don’t need to replace the roof on your house now, you can recommend these ideas to roofers, friends, or colleagues.

Why Underlayment for Your Tile Roof?

Given that a tile roofing system does allow water to fall off, using a watertight underlayment that will serve as a primary waterproof barrier is the best thing to do. This is why you shouldn’t compromise the underlayment and flashings of your tile roofing. Usually, the tiles only provide aesthetics and enhance the exterior look.

It’s the underlayment that offers the protection of the entire roofing facility’s needs. Ideally, the underlayment quality should be superior to or at least of equal quality with the tiles. This will ensure durability and extend the life of the tiles.

Best Underlayment for Tile Roof: Synthetic?

Generally, roofers and homeowners often recommend using the asphalt-saturated felt and synthetic underlayments for tile roofing. These two have proven to be the best in the industry for this type of roofing. What do the felt (paper) and synthetic underlays mean, and which is better for tile roof?

Synthetic Underlayment

Woven from polyethylene or polypropylene material, synthetic underlayment boasts several incredible features that make it suitable for use beneath your tile roof.

Typically, microfiber underlayment is popular for its high density and resistance to damage. It’s also a great option because it doesn’t get easily damaged during installation. To measure synthetic underlayment, the roofer has to use the grams-per-square-meter scale.

Asphalt-Saturated Felt Underlayment

Asphalt felt underlayment features two thickness levels: the 30-pound and 50-pound, with the 30-pound showing some damage resistance and roof protection capacities than the 50-pound level. Made from the blend of polyester, asphalt, bitumen, and cellulose, the asphalt felt underlayment is waterproof and semi-permeable. It is cost-effective.

Comparing Synthetic vs Asphalt-saturated felt


Synthetic underlayment is heavy-duty, yet lightweight, unlike the asphalt, felt underlay. It’s often recommended to use lightweight material under tile roofing. This will achieve two ends: avoid adding extra weight to the overall roof and withstand tears.

The lightness of the synthetic underlayment also enhances ease and safety during installation. Using lighter material makes the underlayment effective water barrier and roof protector against water.

Tear Resistance Capacity

Using tear-resistant roof underlayment material like the synthetic underlayment helps the roof to resist. It also withstands tear when exposed to the elements, including high wind and pressure from the human foot.

And because they don’t soak water, synthetic underlayment has a high resistance to fungal, wrinkle, and UV. The felt underlayment degrades upon exposure to wind and wrinkles when met with cold weather. It cracks once it moistens.


One of the most significant advantages of synthetic underlayment over their asphalt felt type is that the latter contains volatile compounds. When exposed to mild or high heat, the compounds quickly dissolve and cause the asphalt felt underlayment to absorb moisture that will render them fragile and ineffective.

Ease of Installation

When installing the two underlayments, synthetic types are more comfortable, safer, and quicker to install. While the synthetic underlayment rolls stand at 42-inches long and can spread across 126000 square inches, the asphalt felt rolls are 36-inch and cover 57600 square inches.


Due to their versatility, synthetic underlayments are more expensive and offered at higher costs than the asphalt type.  

What to Consider When Choosing Underlayment For Tile Roof

Now that you have the information on your palms, you need to also bear in mind that the type of underlayment you use for your house roof depends on several things, including climate, type of primary roof, house owner preference, and local laws, among others.

Climate of Region

The climate and change in latitude prevalent in and peculiar to your region and state of residence. There is a specific roof’s underlayment for areas with a temperate environment different from those in hot, cold, dry, or humid regions. Comparatively, while felt underlayment may work in part like humid Florida, the synthetic type will be the best option in an arid region like Arizona.

Durability & Quality of Material

You must bear in mind that the best underlayment for tile roofing must come with top-strength sturdiness and durability. That’s, it must be rugged and robust enough to hold out against the elements and give support to the overall weight of the tiles.

Frequently Asked Questions

Q: Is roof underlayment necessary?

Well, to some, roof underlay isn’t necessary if your roof is not low in slope. But I can tell you that, just as your body’s cell membranes act as a barrier to protect cell components and allow access to needed nutrients, your roof underlayment serves as a membrane as well. It comes as a watertight layer and barrier that protects water penetration out of your tile roof. They are added to the deck or plywood just before you install the shingles. So, whether your roof is low-slope or high water-risked, you can still provide the roof underlay.

Q: Should I invest in peep and stock underlayment?

Yes, You should if you can afford it and I do not suppose it’ll break the bank. This fiberglass-made type of underlay comes sturdy and durable, and it’s capable of sealing even when sharp-mouthed objects, like nails, prick it.

If you need an underlay that can withstand puncture and will offer the best defense in the face of storms and winds that often rip off your roof shingles, the peel and stick is the right pick.


Behmer Roofing: Equipped with this ample and well-detailed information, it’s unlikely you have any difficulty choosing the best underlayment for your tile roofing system. To escape avoidable litigation or leakage arising from the use of substandard roofing material, you need the best and right underlayment for your tile roof.

Contact Behmer Roofing

Behmer is ready to take on your toughest roofing challenges. Located across Arizona, Behmer Roofing handles all projects from roof replacements, maintenance, new construction and commercial roofing. Contact us today for more information.