How To Do A Roof Layover

So even though an overlay might be good in the short term it s likely to cost you more money in the long run. There are generally two options when installing a new roof. Re roofing or layover is a process in which the second set of shingles is layered over an existing set of shingles on a roof without taking off the existing layer of old shingles on a roof.

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The condition of the existing roof is critical.

How to do a roof layover.

After that both layers of shingles must be removed and a new set of shingles placed on your roof decking. Multiple layers of shingles can make it difficult or impossible for the nails to penetrate. Because of the extra weight caused by two layers of shingles only one overlay can be done on a roof. We don t do too many roof overs anymore.

If the shingle on there is a standard exposure 5 to the weather then you will want to find a shingle of the same dimension to do the roof over. A roof can only have one layover done. Use a roofing shovel. Inspect the condition of your current roof.

That means double the labor and debris just when you re taking the roof off. Tear off the old one and start from scratch or overlay a new roof one on top of the old one. Therefore if your roof already has two layers of shingles layered separately you cannot have a layover done on top of it. Remove the ridge caps.

Use a c style drip edge and trim back the first two courses of the existing roof to get the roof started. What you need power nailer or roofing hatchet tape measure roofing shovel or flat pry bar hammer drill carpenter s square straight cut tin snips utility knife chalkline broom. How to install a roof over an existing roof determine the feasibility. How to roof over existing shingles step 1.

And when you do you won t just have one layer of roof to replace you ll have two. There are pros and cons to both approaches. Remove air vents and pipe flashings by prying out or unscrewing the fasteners holding the. You will have a short row on the first course but if the existing roof was installed straight it should come out looking good.

Doing it now will make it easier to keep the job clean. Knowing the costs and benefits can help you make this important decision. Since you do not tear off old roofing shingles a layover can be done much faster and it is supposed to be a cheaper alternative to complete. The roof should be in sound.

A roof overlay is done when the second set of shingles is placed on top of an existing layer of shingles on a roof.

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