Installing the metal roofing over 1x4 s allows the ability to also install additional insulation under the metal roof that can t be done the other two ways it provides a solid flat surface to attach the new metal roof to it creates an air gap between the back of the metal and the shingle roof which allows for airflow.
Putting metal roofing on garage.
One of the strongest features of corrugated metal is its durability.
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On the low end you can install steel corrugated metal panels for about 4 5 6 per square foot includes labor and materials.
Pick metal roofing for greater durability.
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Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps.
For many homeowners installing a corrugated metal roof on a garage shed or patio cover is an easy diy weekend project that can immediately add some design flair.
Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails.
This will be followed by steel shingles at 7 2 7 5 per square foot.
Work at a comfortable steady pace trying not to rip up or carry off too much old roofing at once.
Stone coated metal roofs are more expensive 9 per square foot.
Metal roofing is also available in the form of shingles.
Although you can install corrugated metal roofing over shingles for the best foundation it is recommended that all the old roofing be removed.
In a standing seam roof long single panels run vertically all the way from the eave to the ridge.
If you want to install steel over asphalt your best choice for installing metal roofing is to use a steel shingle system like the one shown instead of the more common and more expensive standing seam steel.
Modern galvanized steel or aluminum is resistant to rust and can easily last up to 100 years.