How To Add Second Layer Of Shingles To Roof

Install the second layer.

How to add second layer of shingles to roof.

Use 1 5 or 1 75 inch roofing nails. Roofing second layer of shingles roofing. It would seem that an additional layer would be beneficial. This step is important because it brings the underlying surface back to a level height consistent with the rest of the roof plane.

When adding a second layer of shingles the bumps or imperfections from the old roof will transfer to the new layer. A roof is one of the most vital components of a house. Shingles add weight to your roof. Posted july 31 2018 by onpage marie.

Secondly if your second layer blows off in a bad storm water will run right under the shingles and down all of the nail holes that have penetrated both layers of shingles. Your roof will not look as good as when you do a full tear off. Place the top of each starter shingle firmly against the bottom of the shingle immediately above it and even with the eaves then nail it into place. You could be adding weight to your roof with a second layer that your house cannot handle.

That in itself eats away at the savings. That second layer of shingles won t last as long. Pros and cons of adding a second layer of shingles. In this video we provide details on how to install roof shingles over existing shingles.

We discuss the nesting method which helps minimize an uneven appear. Most likely your roof structure was designed for a dead load of one layer of shingles plus extra for snow and a safety margin. This is especially true if there is huge snowfall. Add a layer of shingles over the newly repaired area before you install your second layer of shingles.

That helps your final layer of shingles look flat with a proper installation.