It provides structure by tying the trusses and joists.
2 layers roof.
If it s sheets like plywood then 2 layers would be ok but i d taoe tye joints first.
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2 layers of sheathing.
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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.
Rapid roof remover 14 298 views 2 19 replacing shingle roof step by step duration.
Your roof is debatably the single most important element of your house.
Decking most often made out of plywood this roof layer is installed over the framing in a typical roof install.
If it s sheets like plywood then 2 layers would be ok but i d taoe tye joints first.
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If the roof boarding is planks i d go for three layers the first being nailed.
Replacing a roof can be very expensive and exhausting at the same time.
Can be very expensive and exhausting at the same time.
Two layers of shingles trap more heat which in turn damages the shingles and shortens the life span of the roof.
It protects everything under it and it needs to be done right.
Two roof layers can work if the existing roof is in good condition but you shouldn t put more than two layers of shingles on your roof because of the weight.
I am.
Here are the layers of a roof in order of application bottom to top.
If you don t have a sound roof the problems with your house are going to multiply rapidly.
Saving on the initial shingle installation doesn t solve the long term cost of adding a second layer of shingles.