Can You Have Two Layers Of Shingles On A Roof

By not removing the first layer of shingles homeowners would be able to save on labor costs and shorten the time frame of the job.

Can you have two layers of shingles on a roof.

This is especially true if you ve overlayed your new shingles on top of warped shingles. If the structure can support the added weight a typical 20 square 2 000 square foot reroof will cost at least 1 000 less than a tear off job. The taylor made team. Affects inspection reports.

If you don t tear off the old layer you can t examine the decking. If there is one thing that i love about my industry it is that things are constantly changing. As mentioned above homeowners are legally limited to two layer of roof shingles. When i started my real estate career i sold homes with three layers of roofing.

Therefore if you already have two layers you ll need a full tear off. Though both these points are valid you will end up spending the same amount of money or more later to have two layers of shingles removed. There are some advantages to roofing over existing shingles says dale richards owner of richards roofing in troy michigan. The main case for adding a second layer of shingles is simplicity.

Another issue is that when you add in the second layer it can add extra weight to your roof. And roofing guidelines are no exception to the rule. Richards also estimates that the homeowner saves at least 1 000 in costs associated with removing and properly disposing of the existing shingles. Now for the why.

Reasons why you should not add a second layer of shingles it will shorten the lifespan of your roof. The second layer of shingles will trap heat which can result in the decomposition of both roof layers. The homeowner will have two layers of shingles protecting the roof and the home is less likely to have ice dams he says. Most building codes allow two layers of organic or fiberglass asphalt shingles on roofs with a 4 12 pitch or less and three layers on steeper roofs.

This will force you to replace your roof earlier than expected. The short answer is yes. Most people would limit this practice to a total of two layers of shingles. Having multiple layers of shingles is going to make your roof hotter because the heat gets trapped between the layers which could mean premature aging of the shingles.

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.