You have a roofing problem. You know the current shingles on your roof have seen better days, and you figure that it’s time to do something about it. So, can you install another layer of shingles over the old ones? Here is some information in answer to that question.
New Layer over Old
Exactly how many layers of shingles can you put on a roof? Well, it depends on the condition of your current shingles. You can talk to a roofing expert about your problem and if they’re on the up-and-up with you, they’ll want to give you the information you need to make the best possible decision.
Layer Allowances
Building codes in most cities and counties allow for two layers of fiberglass, or organic shingles on roofs that have certain pitches, usually 4-1/2 inches or less. Three layers are allowed for steeper roofs.
Sheathing and Roof Structure
As long as the sheathing (material on which shingles are attached) hasn’t experienced extensive damage, or the actual roof structure itself is able to withstand and support the weight of added layers, no problems should occur.
Costs
When a structure is able to withstand the weight of additional shingles, the costs will likely be thousands less than a tear-off, or complete removal of the roof. With a tear-off, you’re paying for demolition, placement of felt paper, weather resistant covering, labor, cleanup and any other issues.
Appearance
When a reroofing job is done on your roof, it should appear just as good as a totally new installation, plus the job should last as long as a new one, and not cost as much. The best part is you’re free of the hassle of it all. Just make sure the installation is first-rate.
Consult
You might think that your shingles are shot and that your entire roof should be stripped down to the sheathing and beyond, but there is hope. Talk to friends, family or acquaintances who have simply added shingle layers to their roofs. Find out their experiences.
Also, consult with a roofing contractor and set up a roof inspection. An expert can help you determine whether your shingles are beyond repair. If they’re still in decent enough shape, you can save a lot with another shingle layer or overlay. When you go the layering route, you can save yourself a lot of time, money and aggravation.
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