But first here are a few precautions about the underlying material.
Installing tin roofing over shingles.
A layer of underlayment installed on top of the existing shingles will help keep the granules of the old shingles from rubbing against the back of the metal and causing possible corrosion.
When choosing to install a metal roof homeowners need to.
What s involved in how to install metal roofing.
This is by far the most common way to install a metal roof.
But roofers can install a vented metal roof that eliminates this potential problem.
After all you ll be making a significant and long term investment.
Although you can install corrugated metal roofing over shingles for the best foundation it is recommended that all the old roofing be removed.
Installing metal roofing over shingles is the best solution.
A metal roof is an alternative to a shingle covered roof but a metal roof can actually be installed over shingles.
Otherwise you will need to remove the shingles.
Make sure roof is square.
Address any existing roof leaks and replace rotten rafters or.
Both metal and shingle roofs are great options for your next roofing project.
If you choose to install metal roofing over shingles there are certain things you must keep in mind.
If trapped between the metal roofing and old roofing moisture can build up and cause mold and rot.
Things to know about metal over shingle roof problems.
Work at a comfortable steady pace trying not to rip up or carry off too much old roofing at once.
Codes vary so call your local building department to know how to install metal roofing over shingles properly code wise.
The metal used for the roof can be tin copper aluminum or steel.
3 install 1x4 purlins down over the shingles before installing the metal roof the third way to install a metal roof over shingles is by applying 1x4 purlins over the shingle roof.
Installation of metal roofing over shingles.
This is what it looks like when you install a steel shingle roof system over an existing asphalt shingle roof.
In terms of performance many homeowners choose a steel roof making it the most popular option when it comes to creating a metal roof over existing shingles.
However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof.
If you are trying to decide between the two materials it s important to carefully look at the metal over shingle roof problems.
Or installing the new metal roofing over furring strips 1 x 3s or similar will raise the metal and provide a ventilating air pocket between layers.
Anatomy of a steel roof.