Should You Install Two Layers of Roofing Shingles in Florida?
- JoeTriangleRoofing
- Oct 23
- 3 min read
How Many Layers of Shingles Can Be Put On a Roof?
If you live in Ormond Beach and surrounding areas, you've likely considered getting a new roof for your older home. The insurance company may even have suggested this for your policy. But what if your shingles are still in good shape? Can you put a layer of shingles over shingles?
Layers of asphalt shingles on your roof may seem like it might offer more protection, but does it? Choosing to layer shingles may cause more problems than it solves. Leaving the existing layer of shingles in place may offer short-term conveniences and save some money up front, but it often causes long-term headaches and expenses.
Florida Roofing Regulations for Two Layer of Shingles
Florida allows only one additional layer of shingles over an existing layer for a total of 2 layers. If your roof already has 2 layers of shingles, a complete tear-off is required before any new shingles can be installed.
Before adding the new layer of shingles, inspecting the roof must be done to ensure it can support additional weight without compromising the roof decking.
If the roofing material has blisters or is water soaked, it must be removed.
The new layer of shingles must be compatible with the existing shingle layer. This can be the toughest challenge if you have an older roof.
The Florida Building Code (FBC) must be followed for insurance, inspections, and legal liability. FBC gets updated every few years and good roofing contractors should always follow the latest update.
Is a Second Layer of Shingles Too Heavy?
Your home's structural integrity is probably designed to support one layer of roofing, especially in Florida. Whether you opt for 3-tab or laminate shingles, adding a second layer doubles the weight on your roof. This excess load can strain the decks supporting your roof, leading to more wear and potential structural damage.
Can You Sell a House with Two Layers of Shingles?
When it comes time to sell your house, home inspectors look at every detail, especially your roof. Having two layers of shingles can raise red flags, including the condition of your roof deck. Inspectors generally consider two layers of roof as a problem; this can bring down the value of your home. The inspector cannot tell if the wood damaged underneath. This could impact your sale. Many buyers are looking for a new roof, especially in Florida, given recent insurance coverage concerns. So, ultimately this could end up costing you a sale, or even selling your home at a discounted price. Why take the risk?
Will Two Roof Layers Affect My Warranty?
Installing a new roof offers the option to purchase extended warranty plans. However, having two layers of shingles can void these warranties due to the risk of damage or improper installation. The added heat retention from double layers can accelerate shingle deterioration, even with proper roof vents. And after a major storm? Your insurance company may also deny your claim.
What Do Two Layers of Shingles Look Like?
Your home's appearance matters and the roof plays a big role in curb appeal. While you might think that two layers of shingles would look similar to one, it really doesn't. Installing new shingles over existing ones can result in an uneven base, leading to "humps", visible ridges and "dips" - like stairs! This is an unattractive roof. Your home could be hard to sell.
Problems with Two Layers of Shingles
Going with two or more layers of shingles presents long-term issues, including:
More costly repairs: A double-layered roof complicates repairs, making even minor issues, such as roof leaks, hard to spot and difficult to fix.
Shorter lifespan: Double-layer roofs may not last as long due to increased weight, heat retention, and moisture buildup.
Higher removal costs: When it's time for a new roof, removing two layers requires more labor and time.
If your have lifted shingles after a storm, this could look even worse than you bargained for!
Ultimately, a reputable roofing contractor will likely advise a complete roof replacement.
However, installing two-layer roofs can be done successfully if done correctly. Before making any decisions, it's important to talk it over with a trusted roofing contractor. You don't want to regret opting your decision down the road. Don't use a roofer you without a good, local reputation.
Reach out to our team of licensed and insured contractors at Triangle Roofing, Inc. in Ormond Beach, FL, for expert guidance and a seamless roofing experience. Contact Joe at
(386) 673-6600
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