Composite or synthetic shingles have become popular recently because they are eco-friendly and durable. They can be made to look like natural cedar shake and slate tiles, but they weigh less and cost less to install. Many are resistant to storm damage and offer homeowners a sustainable alternative without compromising on durability or aesthetic appeal.
If you’re considering composite shingles, you may be wondering, “How long do composite roofs last? Are these comparable to traditional asphalt shingles?” In general, a composite roof can last as long as 40 to 50 years, but it depends on the specific type of composite shingles and the materials used.
Keep reading to learn more about composite roofs and how long they last.
In This Article
What Is a Composite Roof?
A composite or “composition” roof is a type of roof made of synthetic materials. A traditional asphalt shingle is made of fiberglass, tar, and granules adhered to a fiberglass mat. A composite shingle is made of a blend of synthetic resins, reinforced polymers, recycled materials, salvaged plastic, rubber, and inorganic materials.
The term “composite” may sometimes be used interchangeably with the traditional term “asphalt” because both types of shingles are made with several different materials blended together. But more often, composite roofing refers to plastic or synthetic roof tiles made of compressed recycled materials.
Manufacturers use these materials to create shingles that look like wood or slate but are much lighter and more durable. This gives homeowners a more economical way to achieve the look of clay, cedar shake, or slate without having to pay a higher price for the real material. Because of their shiny appearance, however, they may be easily misidentified as being made of plastic.
Several manufacturers have developed composite formulations that are eco-friendly, meaning they are meant to have a lower impact on the environment. Others make more luxury composites that have an upscale appearance paired with durability and a longer warranty.
Composite shingles haven’t been around as long as the traditional type, but they are growing in popularity. They may cost more than asphalt shingles, but they tend to last longer, often up to 40 or 50 years.
How Long Will a Composite Roof Last?
The longevity of a composite roof really depends on the materials used to create the shingles. Some types are comparable to asphalt shingles and are typically warranted for 20 to 25 years. Others, however, may last much longer. The warranty will depend on the manufacturer.
Factors influencing how long the roof will last include the following.
Materials Used
If you’re talking about a more traditional “composite” asphalt roof that includes fiberglass and asphalt, the shingles are likely to last about 20 to 25 years. Architectural shingles, which have more layers, will last longer than 3-tab shingles, which have only one layer.
Composite shingles made of synthetic ingredients may last about the same length of time, or a little longer, depending on what materials the manufacturers used. Most of these roofs are made to look like wood, slate, and clay tiles. Manufacturers of these types of composite shingles typically offer warranties that last 30 to 50 years.
If the shingles are made with recycled plastic and rubber, for instance, they may have a longer lifespan because they are less easily broken or cracked. (However, they may more easily break in very cold climates.)
Composite shingles often have a high impact rating, meaning they will withstand hail and heavy rain. Most also have water-resistant properties that help prevent algae growth.
Talk to the manufacturer about the material used in the shingles you’re considering and about the material warranty options.
Installation
If the roof isn’t installed correctly, it may not last as long. Installation mistakes can lead to premature leaks, a bumpy or wavy appearance, and a shortened lifespan.
Each of the following can lead to subpar installation:
- Poor workmanship
- Poor weather conditions during installation
- Inattention to installation instructions
- Excluding important roofing components
Beware of the roofing contractor who quotes an unusually low price. They may use cheap materials or fail to install important components to save money. Even if you save money up-front, you could be looking at extensive repairs or another replacement long before you’d expect.
Maintenance
Though composite shingles are typically durable and don’t need much maintenance, some maintenance is still important to get the longest life out of them. That means periodically checking the condition of your roof—at least once a year—and fixing any problems as soon as they appear.
Regular maintenance activities also include the following:
- Removing any debris sitting on the roof, particularly in roof valleys
- Clearing out any pests
- Ensuring the vents are fully functioning
- Inspecting roof flashing to catch any potential leaks
Environmental Conditions
Composite shingles can usually withstand harsh weather conditions better than other types of shingles, such as 3-tab asphalt shingles. They can usually handle powerful wind storms and strongly resist ultraviolet rays from the sun.
Severe storms, however, can wear down most types of roofs and may do the same to a composite roof. If you live in an area vulnerable to bad storms, that can affect the lifespan of your roof.
How Much Does It Cost to Replace a Composite Roof?
If you want to replace your current roof with a composite roof, the cost will likely be more than it would be for standard asphalt shingles. It all depends on the materials that make up the composite shingles.
In general, a new composite slate roof (one made to resemble slate) will cost around $10 to $12 per square foot, with the potential to cost as much as $20 per square foot.
According to the American Society of Home Inspectors, composite or synthetic shingles are priced midrange at around $7.50 to $13 per square foot. (Asphalt shingles are included in that figure.)
HomeGuide provides similar figures, estimating the average cost of a composite roof at about $7 to $14 per square foot, or $15,000 to $26,500 for a total average installed price.
Final Thoughts
If you’re not sure if a composite roof is the best option for you, consult with an expert before committing to any work. With 50 years of experience in the roofing industry, Erie Home has been trusted by hundreds of thousands of homeowners nationwide.
Call us today at 1-800-998-8301 for a free consultation, or contact us via our website.
Frequently Asked Questions
What are the disadvantages of composite roofs?
Composite shingles, because they are more durable, require a higher upfront investment, which may be difficult for some homeowners. They are also a more recent addition to the roofing industry, so it may be more difficult in some areas to have access to all the options.
What roofing material lasts the longest?
True slate is the material listed as, by far, the longest-lasting roofing material, with a life expectancy of 50 to 150 years. It’s extremely expensive, however. For most homeowners, a metal roof is the best choice when looking for longevity.
When should I replace my composite roof?
When determining whether to replace your roof, first consider its age. Check when it was installed, and the warranty on the materials. Asphalt shingle roofs can last anywhere from 10 to 40 years, and composite roofs can last for 40 to 50 years. However, it depends on many factors, including the roofing materials and roofing maintenance.
Next, look for signs that it’s time for a replacement. These may include buckled and curled shingles, rusted roof valleys, missing shingles or tiles, sagging in the roof, rotting boards, moss and mold around the roof, and water leaks.
What time of year is best to replace a roof?
Fall is considered the best time of year for roof replacements. It’s not as hot as summer and typically offers warm weather and long days.
What color roof shingles last the longest?
Light-colored roof shingles are thought to last longer as they absorb less light and heat. That means they may be less likely to break down as quickly as dark-colored shingles. However, this hasn’t been conclusively proven in studies.
Based on current knowledge, color doesn’t seem to have much to do with longevity. More important factors include roofing materials, maintenance, and ventilation.