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Should Plywood Go Under a Metal Roof?

April 13, 2023 | By Mike Gonet | Filed under: Blog

A Metal Roofing Company in Rhode Island

Installing a roof is more than just placing some shingles on top of your attic. It’s an extensive process that involves multiple layers of materials and several steps. Fortunately, the team at Classic Metal Roofs can get the job done right. Based in New England, we know how to install metal roofs up to the highest standards. We’ll explain each step of the process, including whether a plywood underlayment is necessary in your case. Learn more about underlayments and why they’re so important to metal roof installation.

When You Need an Underlayment

Nearly all traditionally-built homes will need an underlayment. This essential part of any roof lies on top of the sheathing but beneath the top layer that passersby will see. Even metal roofs require an underlayment, despite their reputation for durability and impermeability. While the answer “do I need an underlayment” is generally yes, there are a few instances when it may not be necessary, such as:

Covered patio construction
Buildings covered with structural metal panels
Metal roofing installed on top of existing asphalt shingles

Why a Plywood Underlayment Is Crucial

Installing a plywood underlayment is almost always your best bet. The team at Classic Metal Roofs recommends this process for nearly every job we complete involving metal roofing panels. This is because many metal manufacturers require an underlayment to validate their warranties, plus several other reasons. Here’s why a plywood underlayment is always a good idea:

Create a Protective Layer

A roof is made up of more layers than just some metal shingles. The underlayment provides an added layer of protection for your home should a storm hit or a branch fall. New England sees some pretty hefty storms, and you want to feel protected when the rain and wind start. Even during sunny weather, the underlayment provides added protection from UV rays and normal wear and tear.

Avoid Water Damage

A properly-installed underlayment is a crucial step to avoiding water damage. When storms blow in, water can get lodged in the roof and create a breeding ground for mold and mildew. But when you have a plywood underlayment, you can avoid the worst of the rot and decay. What’s more, an underlayment can reduce the effects of everyday moisture condensation.

Save Time and Money

Ensuring that your metal roof has an underlayment will save you time and money in the long run. You’ll minimize your chances of future structural issues with the roof, which can be expensive and time-consuming to fix. Better the spend the time and money now on a proper installation than wait for the worst-case scenario!

Why Choose Classic Metal Roofs

Whether you’re curious about getting a plywood underlayment or have another question about metal roofing, our team is here for you. As trusted metal roofing contractors in the region, we offer a range of services to ensure you get the best quality result possible. In addition to a wide range of services, warranties, and plenty of positive reviews, we can also provide roofs in the following styles:

Get in Touch With Us Today

Our metal roofing company is dedicated to going above and beyond for our customers in Massachusetts, Connecticut, Rhode Island, and New Hampshire. We understand the importance of a stable roof over your head, and we’ll ensure the job is done right—underlayment and all! Contact us today to get your free estimate.