How To Install Metal Roofing Over Shingles Video. Bend the metal edging to your needs if necessary and fasten it to the roof with nails at every 4 to 6 inches. Then work your way up to the top or center of the roof.
Purlins can be used to provide space between the old roofing and the new metal roofing panels. In this method, the purlins are screwed down to the roof deck, depending on how the metal roofing manufacturer has designed the panels. Shingle roofing systems have a typical lifespan of 20 to 30 years when properly installed with good quality materials.
Installing a metal roof is very labor intensive.
This will provide ventilation while protecting your new roof from the abrasive shingles. Measure your roof it is important to get precise measurements of your roofing area to help in determining how much material you will need. Both metal and shingle roofs are great options for your next roofing project. The second way is to install 1×4 purlins over the shingles.