General RoofingBest Underlayment for an Arizona Roof

March 28, 2022by American Roofing

Three types of roofing underlayment that are perfect for a roof in Arizona’s climate.

It’s no secret that a roof requires a great foundation to do its job, just like a home would need. One of the key factors that goes into a roof that’s going to last is its underlayment, with most roofs requiring at least one or two layers for optimal longevity. Different roof types call for different underlayment, typically made from either synthetic fiber or felt. So which kind is best for a roof in Arizona? We’re giving you three options to consider, but first let’s break down what exactly roofing underlayment is:

What is Roofing Underlayment?

Roofing underlayment is a protective material placed underneath the shingles of a roof before they’ve been installed. It is a waterproof or water-resistant layer that plays an important role in the protection of the structure beneath a roof, as well as the roof itself. Each underlayment type should help the roof withstand severe weather like monsoon season and extreme summer heat. There are various types of underlayment specifically made for each type of roof.


Rubberized Asphalt

Rubberized asphalt underlayment works very well to protect a roofing system against water damage and is perfect for a heavy monsoon season in Arizona. This type is also more heat resistant, meaning it’ll last longer through hot summers. Rubberized asphalt underlayment tends to be the most expensive option because it contains higher amounts of rubber polymers and asphalt, as well as creates a 100% waterproof seal. This roofing underlayment is durable and can withstand heavy weight like tile shingles, which are popular on Arizona homes for their cooling properties.


Asphalt-saturated Felt

Asphalt-saturated felt is the most popular underlayment type that roofing contractors have been using for decades. This protective material is made from a blend of asphalt, cellulose, polyester and bitumen, and is soaked in a waterproofing agent. It has a base mat saturated with asphalt for extra water resistance in heavy rainfall, helping to prevent leaks. Professionals have used asphalt-saturated felt underlayment for so long because it is low-cost and easy to install. It can most commonly be found under your typical asphalt shingle roofs.


Synthetic Underlayment

A more modern option is synthetic underlayment, made by weaving polyethylene or polypropylene materials together with a polymer. Synthetic underlayment is lighter than the above options and safer to install, making it a popular choice for residential roofs. This type also has a much higher wind resistance and tear strength. Due to its lighter weight and resilience, synthetic underlayment is typically easy to install. Most synthetic underlayment is also highly resistant to UV rays, which makes them ideal for Arizona’s intense summers, where we see the UV index reaching double digits.


A sturdy underlayment is a vital part of any roofing system, and there are lots of different options to consider. Be sure to consult with a professional about your roof’s underlayment. American Roofing & Waterproofing has a team of qualified professionals ready to answer all your questions and install a roof that’s right for you. To contact us about your next installation, please click here.


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