Can You Have Two Layers Of Shingles On A Roof

Another issue is that when you add in the second layer it can add extra weight to your roof.

Can you have two layers of shingles on a roof.

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. 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. When i started my real estate career i sold homes with three layers of roofing. 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.

If you don t tear off the old layer you can t examine the decking. As mentioned above homeowners are legally limited to two layer of roof shingles. Richards also estimates that the homeowner saves at least 1 000 in costs associated with removing and properly disposing of the existing shingles. The homeowner will have two layers of shingles protecting the roof and the home is less likely to have ice dams he says.

Affects inspection reports. And roofing guidelines are no exception to the rule. The taylor made team. The main case for adding a second layer of shingles is simplicity.

Any more than that and you d have to tear off the old shingles before installing a new layer. This will force you to replace your roof earlier than expected. There are some advantages to roofing over existing shingles says dale richards owner of richards roofing in troy michigan. 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. This is especially true if you ve overlayed your new shingles on top of warped shingles. The standard practice was that you could install a new layer of singles directly over the old layer during a re roof. In fact the extra layer can reduce your roof s lifespan by up to 40.

If there is one thing that i love about my industry it is that things are constantly changing. Now for the why. The short answer is yes. Therefore if you already have two layers you ll need a full tear off.

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. 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.