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"Replacing an old roof should entail the roofer completes all the works from stripping the old one to fitting the new one"
Answered on 22nd Apr 2021 - Member since Jan 2021 -
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"Find problems – and fix them. When you remove the old roof there is a probability that there may be some dry-rotted wood under the existing roof. When the old roof is removed we can check the entire roof deck for any rotten wood or other problems. Any rotten wood will then need to be replaced to STOP the rot from spreading, and other issues can be addressed at this time.
Start fresh. Removing the old roof and starting with a clean, smooth surface is always recommended. When the new roof is nailed directly to the smooth deck, you not only get a straight even look, but your new roof will perform better and last longer. Leaving the old roof on can cause a “lumpy” effect making the new shingles look like they have lumps under them because of the old roofing material does not provide a smooth surface to install the new shingles over. Water is able to shed quicker on a smooth, flat surface, hence, enabling your roof to perform better and last longer.
Risk vs Reward. A typical tear off of a roof can be approx. 10% – 12% of a Re-Roof price. Replacing dry-rotten wood found after the roofing is complete can cost upwards 100% of the contract price. Future repairs will require double the effort, and double the materials to replace shingles when you have multiple layers of shingles on the house."
Start fresh. Removing the old roof and starting with a clean, smooth surface is always recommended. When the new roof is nailed directly to the smooth deck, you not only get a straight even look, but your new roof will perform better and last longer. Leaving the old roof on can cause a “lumpy” effect making the new shingles look like they have lumps under them because of the old roofing material does not provide a smooth surface to install the new shingles over. Water is able to shed quicker on a smooth, flat surface, hence, enabling your roof to perform better and last longer.
Risk vs Reward. A typical tear off of a roof can be approx. 10% – 12% of a Re-Roof price. Replacing dry-rotten wood found after the roofing is complete can cost upwards 100% of the contract price. Future repairs will require double the effort, and double the materials to replace shingles when you have multiple layers of shingles on the house."
Answered on 30th Nov 2022 - Member since Nov 2022 -
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"Someone have to check before deciding what to do.
If timbers and plywood are affected by water they must be changed"
If timbers and plywood are affected by water they must be changed"
Answered on 20th Apr 2021 - Member since Nov 2019 -
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"Replacing an old roof is essentially installing a new one unless you mean replacing the timber works"
Answered on 21st Mar 2022 - Member since May 2021 -
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"To fit a new roof you have to remove the old one anyway. So you would have to remove the old tiles felt and lath before you can fit the new roof."
Answered on 26th Jun 2021 - Member since Sep 2020 -
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"Installing a new roof is replacing the old one is it not?"
Answered on 21st Oct 2021 - Member since Jun 2021 -
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