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.

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. Pros and cons of adding a second layer of shingles. Posted july 31 2018 by onpage marie. Select a length of roofing nails that penetrates completely through the new layer of shingles existing layer and the wood roof deck.

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. Roofing second layer of shingles roofing. In this video we provide details on how to install roof shingles over existing shingles. Re roofing may affect the warranty on the new shingles.

Adding this membrane isn t an option with a re roof and the extra layer of shingles offers little protection against ice dams. Before you reshingle a roof read our step by step guide for adding new shingles over old ones. Since the roofer is able to identify and repair high risk areas a new roof offers better quality than an old one. A new roof fixes existing issues and traps less heat than multiple layers which can cause shingles to break and curl faster.

How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface. The standard practice was that you could install a new layer of singles directly over the old layer during a re roof. 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.

Be sure to check with the shingle manufacturer regarding all warranty issues and installation requirements before re roofing. Replacing a roof can be very expensive and exhausting at the same time. Flashing around roof penetrations and sidewalls can be compromised. If you don t tear off the old layer you can t examine the decking.

The second layer is also more difficult to install properly compared to new shingles. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros. Re roofing used to be pretty straight forward with 3 tab shingles.