Two layers of shingles trap more heat which in turn damages the shingles and shortens the life span of the roof.
2 layers roof.
If the roof boarding is planks i d go for three layers the first being nailed.
Here are the layers of a roof in order of application bottom to top.
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If it s sheets like plywood then 2 layers would be ok but i d taoe tye joints first.
It provides structure by tying the trusses and joists.
Rapid roof remover 14 298 views 2 19 replacing shingle roof step by step duration.
Pros and cons of adding a second layer of shingles posted july 31 2018 by onpage marie a roof is one of the most vital components of a house.
If you don t have a sound roof the problems with your house are going to multiply rapidly.
Your roof is debatably the single most important element of your house.
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Decking most often made out of plywood this roof layer is installed over the framing in a typical roof install.
2 layers of sheathing.
Can be very expensive and exhausting at the same time.
Replacing a roof can be very expensive and exhausting at the same time.
Two layer roof tear off and pneumatic flooring removal plus testimonial duration.
If it s sheets like plywood then 2 layers would be ok but i d taoe tye joints first.
I am.
Roofing over existing roof metal over 2 layers of shingles return to roofing over existing roof return to archive return to forum this topic has been closed by the administrator.