Determine the measurement of your roof the measurement of your roof will help you know the number of materials you.
How to put shingles over a metal roof.
Installing metal roofing over shingles 1.
Venting the eaves to vent the roof holes are cut in the old roof above the soffit which pulls air through the soffit vents underneath.
Apply roofing felt all over your roof you need to make the roof as straight as possible.
Thus wood strips would be.
Make a slat board base on top of the shingles.
Advantages of metal roofs in general.
This is what it looks like when you install a steel shingle roof system over an existing asphalt shingle roof.
Move from bottom to top.
You will need to lay some 1 by 4 inch pine boards lengthwise every two feet on your roof.