Is it ok to put new shingles over old in NC?
The majority of roofing professionals will recommend tearing off existing shingles rather than lay-over. There are many reasons why a tear-off and replacement will be better in the long run. When you tear off the old shingles it allows professionals to replace any rotten wood or damaged boards which are found under the shingles. Had we simply installed new shingles over the old ones some of the damaged wood could get worse over time (thus creating a large issue to repair in the future).
During a tear-off job we also are allowed to apply more water resistant layers in the eaves, valleys and flashing locations, this underlayment is the last defense before water touches the wood and framing of the home. Once the old shingles are off the roof it also allows us to re-nail any existing boards that have become loose over the years. This secures your roof and will give you peace of mind knowing that if strong winds were to happen then your roof wouldn't blow away due to not being secured.
One of the biggest reasons to not install new shingles over old ones is the amount of weight it puts on a home. Depending on the size of the home and the quality of the shingles and new roof can add on a couple extra tons of weight. If you added up the weight of the old roof, the new roof, ice, rain and snow then the support beams really have a load to carry. If the roof weighs too much it could cause structural problems and potentially be catastrophic to the integrity of the home.
The other biggest reason to tear off your old roof and replace it with a new one is the lifespan. A new roof will last much longer if it is installed directly to the underlayment and plywood. The nails and flashing are much more secure and the possibility of potential leaks is much less if there are no other layers between the new shingles. Our business is here and ready to help with your tear-off roof replacement and will help answer any more questions you have. Be sure to call us today for a free quote and to have one of our experts come take a look at your roof.
During a tear-off job we also are allowed to apply more water resistant layers in the eaves, valleys and flashing locations, this underlayment is the last defense before water touches the wood and framing of the home. Once the old shingles are off the roof it also allows us to re-nail any existing boards that have become loose over the years. This secures your roof and will give you peace of mind knowing that if strong winds were to happen then your roof wouldn't blow away due to not being secured.
One of the biggest reasons to not install new shingles over old ones is the amount of weight it puts on a home. Depending on the size of the home and the quality of the shingles and new roof can add on a couple extra tons of weight. If you added up the weight of the old roof, the new roof, ice, rain and snow then the support beams really have a load to carry. If the roof weighs too much it could cause structural problems and potentially be catastrophic to the integrity of the home.
The other biggest reason to tear off your old roof and replace it with a new one is the lifespan. A new roof will last much longer if it is installed directly to the underlayment and plywood. The nails and flashing are much more secure and the possibility of potential leaks is much less if there are no other layers between the new shingles. Our business is here and ready to help with your tear-off roof replacement and will help answer any more questions you have. Be sure to call us today for a free quote and to have one of our experts come take a look at your roof.