No, you do not have to tear off your shingle roof. Metal roofing can be installed over top of shingles. One of the major advantages of metal roofing is that it is very lightweight. This makes it a perfect material to be installed right on top of an existing shingle roof.
Can metal roofing be installed over shingles?
In almost every case, the answer is yes, you can lay down a new metal roof over an existing shingle roof. This is one of the many reasons metal roofs keep growing in popularity – their installation doesn’t require completely tearing off the existing roof, which is a time-consuming and expensive job.
Should you remove shingles before putting on 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.
What are the disadvantages of metal roofing?
Disadvantages of metal roofs
- Affordability. Metal roofs can be as much as two or three times more expensive than other roofing materials. …
- Noisiness. …
- Expansion, contraction and fasteners. …
- Inconsistency of color match. …
- Performance.
What is the best way to install a metal roof over shingles?
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Quote from Youtube video: We never recommend installing it right over the shingles because that created the the shingles typically have a granulated surface.
Can you put metal roof over shingles without furring strips?
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.
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.
Is underlayment necessary for metal roof?
Some might choose to skip using underlayment to save money. However, the metal roof underlayment acts as an added layer of protection. You can save money by using underlayment because it will help you avoid problems that would need to be fixed. The short answer is yes, your metal roof does need underlayment .
What is the best underlayment for metal roof?
Known by many different names (including felt paper, roofing tar paper, and asphalt-soaked felt), felt underlayment is the most commonly used type of underlayment material on steep-slope metal roofs. Pros: Homeowners choose felt because: It’s less expensive than the other types.
Do you put plywood under metal roof?
Although it may seem counterintuitive, metal roofing can be attached directly to your building’s roofing structure without the need and expense of plywood sheeting.
Can you put metal roofing directly on rafters?
Metal roofing can be installed directly on open rafters. A metal roof can easily be installed directly over open rafters. Corrugated metal panels are relatively lightweight and can be purchased to fit almost any situation.
Do metal roofs need ICe and water shield?
can You Use Standard ICe & Water BArrier beneath metal Roofing? The short answer is probably not. Most manufacturers of fully adhered roofing underlayment, or “ice and water shield,” offer their product in two major categories. These categories are regular and what’s known as “high temp.”
Can you install metal roofing without strapping?
Single wood strapping is better than no strapping, as it creates a wider gap between the existing roof decking and the metal roof, but doesn’t afford enough ventilation to resolve condensation issues. It also does not allow leveling of the roof, which corrects swells and swales on the roof.
How much should a metal roof overhang?
A typical metal roof overhang may be 2 to 4 inches, or even less. Some slight overhang is recommended, in conjunction with a drip edge flashing, to prevent water from getting under the roofing and onto underlying wood.
Do you need a drip edge with a metal roof?
A drip edge is not needed for metal roofing. If you make sure to overhang your metal roofing at least an inch, the drip edge is not necessary at the eaves and rakes. If the metal roof is hanging over an inch, the water will be directed away from the fascia anyway if at a slant.
What is the minimum roof pitch for metal roof?
The minimum slope for a metal roof with exposed fasteners and seams without sealant is 3:12, which means 3” of drop for every 12” of horizontal run. Roofing with exposed fasteners and lapped seams with sealant can go lower – ½:12.
