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So if your roof has two layers it may require a complete tear-off even though steel is lighter than asphalt. Can you avoid tearing off your old asphalt shingle roof by putting a steel roof over it.

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Things to Know About Metal Over Shingle Roof Problems.

How do you put a metal roof over shingles. The first is to apply an approved underlayment over the old shingles. Does the roof have more than 1 layer of roofing material. This method has its benefits as well.

The purlins are screwed or nailed down to the roof deck depending on how the metal roofing manufacturer has testing for their roofing panels and then the metal is installed to the purlins. Get precise area measurements of each roof section taking into account valleys dormers and chimneys. As long as the plywood under the shingle roof is in good condition this way can provide many benefits.

This is the fastest way to install but it doesnt provide the flattest surface for metal roofing installation. Apr 07 2020 How to Install a Metal Roof Over Existing Shingles Start with an underlayment over the existing shingles. Most codes now allow no more than two layers of roofing before requiring a complete tear-off.

Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps. Steel shingles weigh about 14 what asphalt shingles weigh and aluminum shingles weigh about 18 what standard shingles weigh. Metal roofing weighs less than one pound per square foot.

The vast majority of installations of the metal roofing systems produced by my company are over existing shingles. Can you put plywood over old shingles. This will help prevent water leakage and provide a buffer between the metal roof and the existing shingles.

Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails. As mentioned above homeowners are legally limited to two layer of roof shingles. Jan 28 2019 The second way to install a metal roof over a shingle roof is with the use of purlins or battens.

After all youll be making a significant and long term investment. Lay the Felt and Wooden Strips. This question especially arises when the homeowner plans on replacing a shingled roof with a metal roof.

The low weight of metal roofing is one thing that encourages this. The new plywood will have to be nailed to the rafters or roof trusses. In some areas building officials only allow a re-roof over one layer of shingles.

Jan 24 2019 3 Install 14 Purlins down over the Shingles before Installing the Metal Roof The third way to install a metal roof over shingles is by applying 14 purlins over the shingle roof. Both metal and shingle roofs are great options for your next roofing project. If you are trying to decide between the two materials its important to carefully look at the metal over shingle roof problems.

Jun 08 2017 Hello Todd We had a leak and we had put some tar to stop it but wasnt working so We had a roofer install a metal snap-tite roof on top of our old shinglesOur home is a low slope manufactured 2-12or 3-12 at besthe didnt put anything on top of the old roof just metal no felt or wood stripsI know this because I watched part of the day. Metal roofing is also available in the form of shingles. Asphalt shingles can weigh up to four pounds per square foot depending on the brand.

Other areas will allow you to re. You must put in a completely new underlayment over the existing shingles before you carry out any installation. But with the old plywood left in place it will be considerably more difficult to locate the rafters to ensure proper nail placement.

When installing the metal roof you will use panels to secure the metal to the existing shingle roof. Its important to know the area of the roof surface to gauge how many panels youll need. So can you put metal panels over shingles.

One of the biggest questions homeowners have when they start thinking about replacing their roof is whether or not they can install the new roof over the existing one. Nov 29 2019 Can you put steel roofing over asphalt. This is by far the most common way to install a metal roof.

Oct 19 2019 If you wish to install metal roofing over shingles its recommended to do it one of two ways. The second way is to install 14 purlins over the shingles. If you dont want to take our word for it check with your local building department.

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