When installing a new roof, the first thing to come to mind would usually be which shingle is the most suited to your area’s climate. However, the type of underlayment you install is just as important as the shingles attached to it, says A Cut Above Exteriors, a trusted local roofing repair contractor.
How Underlayment Protects Your Roof
The underlayment serves as a secondary barrier for wooden decking (the base of your roof) that protects it from rain in case the shingles get damaged or dislodged, as well as the chemicals used in shingles. However, not all underlayment options offer the same level of protection.
3 Types of Underlayment
The three kinds of underlayment—asphalt-saturated felt, non-bitumen synthetic underlayment and rubberized asphalt underlayment—each have their pros and cons.
- Asphalt-saturated felt underlayment – This is the most affordable option of the three and comes in 15-pound and 30-pound varieties. The 30-pound variety may be stiffer than the 15-pound option, but it’s less likely to be damaged during roof installation.
- Non-bitumen synthetic underlayment – This is more resistant to water than asphalt-saturated felt underlayment, which is also why most roofing contractors prefer this kind of material.
- Rubberized asphalt underlayment – Thanks to its protective membrane, which has a high percentage of asphalt and rubber polymer and adhesive underside, this type of underlayment is completely waterproof, but it’s also the most expensive option. Given its features, however, rubberized asphalt underlayment is certainly worth the cost.
To maximize the protection provided by underlayment, only hire certified contractors. After all, even the most expensive or durable underlayment won’t be able to protect your roof if it isn’t installed properly.
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In business since 1995, A Cut Above Exteriors offers a wide range of professional roofing services. To request a free estimate, call us at (503) 334-0733 or leave us a message here. We serve homeowners in Portland, OR, as well as the surrounding communities in Oregon.