New Roof Or Second Layer Of Shingles

We discuss the nesting method which helps minimize an uneven appear.

New roof or second layer of shingles.

How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h. Plus depending upon the size of your roof you ve added multiple tons of weight which could pose a big problem if there is significant snow accumulation. The standard practice was that you could install a new layer of singles directly over the old layer during a re roof. Apply the shingles to all roof planes ending a row of shingles at the top of the plane which is the ridge or peak and cut to follow the profile of any outside corners.

If you don t tear off the old layer you can t examine the decking. Flashing around roof penetrations and sidewalls can be compromised. Posted july 31 2018 by onpage marie. Replacing a roof can be very expensive and exhausting at the same time.

Adding this membrane isn t an option with a re roof and the extra layer of shingles offers little protection against ice dams. A roof is one of the most vital components of a house. Since the roofer is able to identify and repair high risk areas a new roof offers better quality than an old one. Re roofing used to be pretty straight forward with 3 tab shingles.

Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros. Most people would limit this practice to a total of two layers of shingles. For a second layer to be as good as a roof tear off you would have to have sound decking no leaks and a roof with no sidewalls where flashing is needed in order to tie the tiles in to the exterior walls. If you have done some serious research on roofing then you have probably heard about adding a second layer of shingles on top of the old ones.

Be sure to check with the shingle manufacturer regarding all warranty issues and installation requirements before re roofing. A new roof fixes existing issues and traps less heat than multiple layers which can cause shingles to break and curl faster. Before you reshingle a roof read our step by step guide for adding new shingles over old ones. Pros and cons of adding a second layer of shingles.

Re roofing may affect the warranty on the new shingles. Select a length of roofing nails that penetrates completely through the new layer of shingles existing layer and the wood roof deck. The second layer is also more difficult to install properly compared to new shingles.