When it comes to renewing or replacing the entire roof, there are certain factors that need to be considered in advance. Layering asphalt and tile shingles over an existing roof is a good way to replace your old and worn out roof, but it may not be such a profitable idea in every such case. A roof, which is comparatively good in condition, can take an additional layer of asphalt shingle, without facing any such adverse or drastic effects.
The single biggest disadvantage of adding a new layer over an existing roof is the added weight. Buildings are designed to withstand a certain amount of load, and when the limit exceeds it might fail dramatically, causing a serious disaster and even loss of human lives. Depending on the building code, it might be possible to layer a new roof, but there are other problems that one might face in the near future. Asphalt shingles and tiles having a warranty of 30 to 50 years are significantly heavier than the cheaper ones.
The reasons why homeowners are attracted towards this option is minimum renovation work and hence it reduces labor costs. This involves an extra payment to laborers for removing the existing shillings and damaged parts. This option can be considered worthless and dollar wise foolish for the below mentioned following reasons. Legality: Homes in the mid-west are classified as “moderate hail zones” and it is illegal to install a new asphalt roof over an existing one.
Manufacturer warranty: Roofing manufacturers have warranties that protect customers from the cost of replacement when the roof is malfunction. The warranty gets void if a new layer is put on top of it. Winds and improper layering will leave it vulnerable to attack from the elements.
Sealing issues: It is improbable that current shingles will line up with the old ones, and this may lead to serious drainage issues.
The single biggest disadvantage of adding a new layer over an existing roof is the added weight. Buildings are designed to withstand a certain amount of load, and when the limit exceeds it might fail dramatically, causing a serious disaster and even loss of human lives. Depending on the building code, it might be possible to layer a new roof, but there are other problems that one might face in the near future. Asphalt shingles and tiles having a warranty of 30 to 50 years are significantly heavier than the cheaper ones.
The reasons why homeowners are attracted towards this option is minimum renovation work and hence it reduces labor costs. This involves an extra payment to laborers for removing the existing shillings and damaged parts. This option can be considered worthless and dollar wise foolish for the below mentioned following reasons. Legality: Homes in the mid-west are classified as “moderate hail zones” and it is illegal to install a new asphalt roof over an existing one.
Manufacturer warranty: Roofing manufacturers have warranties that protect customers from the cost of replacement when the roof is malfunction. The warranty gets void if a new layer is put on top of it. Winds and improper layering will leave it vulnerable to attack from the elements.
Sealing issues: It is improbable that current shingles will line up with the old ones, and this may lead to serious drainage issues.