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.

New roof or second layer of shingles.

Re roofing used to be pretty straight forward with 3 tab shingles. Be sure to check with the shingle manufacturer regarding all warranty issues and installation requirements before re roofing. Select a length of roofing nails that penetrates completely through the new layer of shingles existing layer and the wood roof deck. Most people would limit this practice to a total of two layers 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. 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. Since the roofer is able to identify and repair high risk areas a new roof offers better quality than an old one. Flashing around roof penetrations and sidewalls can be compromised.

Re roofing may affect the warranty on the new shingles. Replacing a roof can be very expensive and exhausting at the same time. If you don t tear off the old layer you can t examine the decking. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros.

In this video we provide details on how to install roof shingles over existing shingles. A roof is one of the most vital components of a house. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface. 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.

Before you reshingle a roof read our step by step guide for adding new shingles over old ones. Adding this membrane isn t an option with a re roof and the extra layer of shingles offers little protection against ice dams. Pros and cons of adding a second layer of shingles. Posted july 31 2018 by onpage marie.

We discuss the nesting method which helps minimize an uneven appear. Roofing second layer of shingles roofing. 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.