Metal roofs offer several advantages over other types. They are basically impervious to rot, insect damage, and fire. They are incredible also durable.
Most metal roofs have an expected useful life of around 50 years. So, you may not have to replace it again in your lifetime.
Still, putting a new roof on your home even once is a major home renovation project. Between materials and labor, costs can quickly skyrocket.
One way that many homeowners save on roofing costs is by covering their existing roof with a new one. This avoids the cost of stripping and removing the old materials.
Can You Put Metal Roofing Over Shingles?
If you are considering switching from asphalt shingles to metal roofing, you may be wondering if you can skip the teardown process. The short answer is that, yes, you can have a metal roof installed over the top of an asphalt shingle roof.
There are several caveats to that statement, however.
Special Considerations When Reroofing
First, check with local building codes in your area. Many limit you to only two layers of roofing material on your home. If you already have two layers of shingles, you may need to strip the roof down before you install metal.
Next, consider why you are replacing the roof. If there are any leaks, they should be addressed before you install a new roof. That probably means removing the shingles. Any sagging, warped, or rotten boards should also be removed and replaced.
Moisture can potentially get caught between asphalt shingles and your new metal roof. You will want to avoid any complications associated with that. There are some ways to avoid this, such as creating ventilation by building up the new roof with furring strips.
If you are concerned about noise from rain hitting a metal roof, installing it over existing shingles can actually help allay your fears. You will find that the old materials act as a buffer, insulating the inside spaces from any extra noise.
Each Roof Is Unique
Every roofing situation is different. Wear on old roofs possible damage from storms, and a host of other factors could influence whether or not you can install a metal roof over your existing shingles.
The best way to find out if you can install metal over your shingle roof is to have it inspected by a roofing professional. We can schedule an appointment to come out and inspect your roof. After assessing its condition, we’ll explain your options for a new metal roof installation.
Learn more on our home page: Roofing Solutions Hawaii