Yes, you can do a metal roof and asphalt shingle roof combination. In most cases, this is done by adding metal roofing to certain areas of your asphalt roof. These areas include front porches, side porches, back porches, bay windows, and other places that don’t make up the bulk of the roof.
How do you transition from metal roof to shingle?
To get the transition right, you will need to remove shingles from the area around where the metal section will go. Then, the metal pieces go on, and the flashing goes on top. Finally, the shingles go over the flashing and the edge of the metal to complete the transition.
Can you put metal roofing directly on asphalt shingles?
The answer is, YES! One big advantage to metal roofing is that it is light weight, which makes it the perfect material to be installed over an existing shingle roof.
Does a metal roof need an air gap?
Research has confirmed that creating an air space under a metal roofing system will increase energy savings during both summer and winter months. A study was funded by the U.S. Department of Energy and conducted by the Oak Ridge National Laboratory to document energy savings of metal versus asphalt roofs.
Can you mix metal roof and shingles Related Questions
How many layers of shingles can be under a metal roof?
One to two shingle layers can rest safely and securely under a metal roof. Any more than two layers could reduce the stability of your roof. Many building safety codes will not allow more than two layers, so check your local areas before making an installation.
Why not put metal roof over shingles?
The problem is that you already have a shingle roof installed and you’re about to install a metal roof on top of it. This adds some significant weight for your decking and home to hold. And if your decking’s integrity is compromised, this extra weight can do structural damage to your roof and even your home.
Does a metal roof keep your house cooler than shingles?
Metal roofs also can be up to 100 degrees cooler on their surface than asphalt shingle roofing. Additionally, as asphalt shingles are exposed to direct sunlight and other weather elements, they weaken, curl and rip.
How long does metal roof over shingles last?
Metal roofs offer many benefits, including: Longevity. Metal roofs can last 40-70 years, depending on the material. Traditional asphalt roofing materials have an estimated life expectancy of roughly 12-20 years.
Which is easier to install metal roof for shingles?
Shingles typically have a lower price because they are easier to install. Metal roofs, on the other hand, take more specialized knowledge to install, and the material itself is more expensive.
Do you have to remove asphalt shingles before installing a metal roof?
Metal roofs can be installed over your existing roof without tearing off shingles, provided local building codes allow it. While shingle removal is the preferred route, tear-off is messy and raises the cost of the job. A potential problem with this type of installation is trapped water vapor.
Do I need furring strips under metal roof?
It is not recommended to install metal roofing over shingles without furring strips. The thermal expansion and contraction of the metal will rub against the shingle granules and the metal will corrode from the underside. The gaps introduced by furring strips also allow air venting which can reduce moisture.
What is the best underlayment for metal roof?
30# felt underlayment (or two layers of 15# felt) are recommended for metal roof panels. Felt is an all-over roofing accessory made of a natural (wood cellulose, natural fibers, etc.) or synthetic (polyester or fiberglass) base that is then saturated in asphalt to make it water-resistant.
Do you need a vapor barrier under a metal roof?
Without one, water can get trapped in the wall, which will produce moisture and ultimately other issues like rot, mold, and trouble with thermal performance. Vapor barriers are recommended for under metal roofs.
Do you still need drip edge on a metal roof?
If you are installing a metal roof, a drip edge is not required, especially if the roof is at a slant and installed to hang over an inch. Doing this will help direct the water away from the fascia. However, while it’s not necessary to have a drip edge, it is often highly recommended anyway.
What happens if you don’t vent a metal roof?
Moisture in the air that accumulates near the roof will be a recipe for disaster over time. That’s because it can allow for mold, mildew, and condensation to build up around the roof and even in the walls or ceiling.
How much does labor cost to install a metal roof over shingles?
Metal roofing cost an average of $13,200 to install on a 1,700-square-foot roof. It is important to note that more than two-thirds of the price often goes toward materials alone. You’ll pay anywhere from $1 to $25 per square foot for metal roofing materials plus another $2 to $14 per square foot for labor.
Do you need purlins for metal roof over shingles?
Over time the granules from the shingles could imprint on the metal panels, the underlayment helps prevent any imprinting. The other method is to install 1 x 4 purlins throughout the roof. The purlins allow for a flat surface for the metal panels. Shingles can create irregularities along the surface.
How much more expensive is a metal roof compared to shingles?
Traditionally the more popular roofing material, asphalt shingles are less expensive than metal roofs, both for the material and installation. This type of roof shingles typically costs between $5,700 and $12,000 for material and installation, whereas metal roofs typically cost between $5,659 and $16,149.
Do metal roofs leak more than shingles?
Do Metal Roofs Leak More Than Shingles? If installed incorrectly, metal roofs have the potential to leak more than shingles. However, if you find an experienced contractor who can install it correctly, metal roofs shed snow and ice to prevent moisture buildup.
How do you vent a metal roof over shingles?
To vent the roof, holes are cut in the old roof (Detail 1) above the soffit, which pulls air through the soffit vents underneath. Cool outside air then travels under the shingles to the vented ridge (Detail 2), pulling out moisture and heat.