How To Add Second Layer Of Shingles To Roof

It would seem that an additional layer would be beneficial.

How to add second layer of shingles to roof.

This step is important because it brings the underlying surface back to a level height consistent with the rest of the roof plane. 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. This is especially true if there is huge snowfall. Most likely your roof structure was designed for a dead load of one layer of shingles plus extra for snow and a safety margin.

When adding a second layer of shingles the bumps or imperfections from the old roof will transfer to the new layer. Replacing a roof can be very expensive and exhausting at the same time. Pros and cons of adding a second layer of shingles. Posted july 31 2018 by onpage marie.

In this video we provide details on how to install roof shingles over existing shingles. 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. That in itself eats away at the savings. Shingles add weight to your roof.

Use 1 5 or 1 75 inch roofing nails. Roofing second layer of shingles roofing. How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h. 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.

You could be adding weight to your roof with a second layer that your house cannot handle. That second layer of shingles won t last as long. Add a layer of shingles over the newly repaired area before you install your second layer of shingles. Install the second layer.

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