Provided the roof deck is in good shape installing an appropriate standing seam metal roofing such as batten seam over purlins is a viable way to install a new metal roof over the existing asphalt roof.
Diy metal roof over shingles.
Consequently they don t have the same ventilation advantages.
Can you put metal roof over shingles.
Most codes now allow no more than two layers of roofing before.
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.
These systems aren t attached to a frame but instead install directly on the old roof.
However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof.
Metal roofs must be laid flat on a vapor barrier because steel will condensate if there s any air space underneath it.
But some steel shingle manufacturers offer do it yourself systems that cost about the same as an installed asphalt roof.
Whether you are looking to install a metal roof on a shed or a house it s important to know the difference in the various types of metal roofs available.
If it s slightly windy keep the steel downwind from you so a gust of wind doesn t knock you over.
Alternatively a metal shingles roof can be installed over the old asphalt shingles if you do not want to tear it off provided there is only one layer of existing shingles on the roof.
Can you put metal roof over shingles.
My answer often surprises people.
Can you avoid tearing off your old asphalt shingle roof by putting a steel roof over it.
Need a new roof.
Here are some pros and cons.
I frequently am asked whether homeowners and contractors should remove roof shingles from a home s roof before a new metal roof is installed.
Covering your existing asphalt shingles with metal roofing might be worth the expense.
An affordable option and easier to lay than shingles tin is the most commonly used type of metal roofing.
Work at a comfortable steady pace trying not to rip up or carry off too much old roofing at once.
Also don t go up on the roof if it s windy.
Air pockets are indeed a great way to further insulate the roof.
Metal roof over shingles condensation.
Let s take a look at the most common types of metal roofs for houses.
However it is based upon experience with tens of thousands of installations over many years.