However building codes prohibit you from having more than two layers of shingles on your home.
Reasons to replace good roof.
A droopy sagging roof is one that surely needs replacing before further damage occurs to your home.
If you ve never had your roof replaced now might be a good time to get it examined by a professional.
Check the surface for signs of trapped moisture rotting boards or sagging spots especially at.
This is because neglected roofs often breed damage on a structural level trapped moisture can rot support beams and grow mold within your ceiling and this damage has to be taken care of before a new roof can go on the house.
It costs more to rip off old shingles and replace them than it does to just shingle over the existing layer.
How many layers of shingles are currently on your roof.
In this case a roof replacement is a better value.
What s more when it comes time to replace a roof one that s been neglected will be far more expensive.
If your roof is full of moss and algae sags or appears decrepit it sends a signal that your home hasn t been kept up.
If the roof is in good shape a potential buyer can assume the rest of the house has been tended to with care.
Shingles buckled or curling.
Roofs are designed and installed to last a long time but the effects of wind and rain and other bad weather can shorten the life of a roof.