Reroofing is the process of installing a new roof on top of the existing shingles, without removing them. This is also called „roof overlay” and it is practiced for different reasons:
- To save costs. There is less time and work needed, if the old roof is not torn down and disposed, which will translate into lower costs
- To have less impact on the environment
- To have better insulation
- To shorten the installation of the new roof
However, a reroof is not always possible.
A new layer of shingles installed on top of the existing one can be too heavy, in the case of most roofing materials. This is why a reroof is possible only with asphalt shingles and metal shingles, which are lightweight and thus suitable for such a project.
Additionally, a reroof cannot be done if the structure of the roof is damaged, or if the existing shingles are curled and do not form a flat surface. A damaged roof structure is a risk you should never take, because the consequences can be the most severe – the collapse of the roof.
You must weigh very well and responsibly the pros and cons of reroofing, by taking the advice of a professional company like Blue Ox Exteriors.
Article Source on: What Is a Reroof
source https://boext.com/what-is-a-reroof/
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