It is the process where roofers install a new roof over your existing one, i.e. add a new layer of shingles, which means that there is no tearing off of the old roof. It is important to know that this process can only be done once because you can only have two layers of shingles on your roof.
How many times can you go over shingles?
Installing new roof shingles over old effectively doubles the weight of the roofing, so you have to make sure your roof structure can handle the extra load. That’s also why building codes commonly limit re-roofing to no more than two layers.
Is it OK to put shingles on top of old shingles?
You might be able to lay new shingles over existing shingles and avoid the cost of tear-off. If conditions are right, new shingles laid over old shingles can be just as attractive and durable as shingles laid on bare sheathing.
Is it OK to put a second layer of shingles on a roof?
Adding a second layer of shingles will make your roof hotter because heat gets trapped between the shingle layers. Increased temperatures can lead to premature aging of the shingles. Layering new shingles on top of old ones, which might be curved or damaged, can result in some visible imperfections on your roof.
Can I put 3 layers of shingles on my roof?
No, you can’t put three layers of asphalt shingles on a roof. In most states, you’re only allowed to have two layers of asphalt shingles on a roof for fire safety reasons. But that doesn’t mean you won’t still see roofs with three or four layers today.
Can dimensional shingles go over 3 tab?
In most cases, you can apply a second layer of three-tab shingles over an existing roof that features three-tab shingles without having to tear off the existing roof. However, you cannot apply three-tab shingles over architectural shingles.
How long does a reroof last?
For a standard 3-tab asphalt shingle roof, that’s 25-years. As long as your roof has been properly ventilated and installed you should get pretty close to that 25 years of roof life.
How often should you replace asphalt shingles?
In general, this is the recommended replacement schedule based on the material used: Composition Shingles: 12-20 years. Asphalt Shingles: 15-30 years. Wood Shingles: 20-25 years.
How long does a third roof layer last?
The type of asphalt shingle roof will also influence how long your roof will last. 3-tab shingles typically last between 15 and 20 years. They are the cheapest asphalt shingle option. Architectural shingles, or dimensional shingles, have a longer lifespan of 20 to 30 years.
How much does a new layer of shingles cost?
A standard 2,200- to 3,400-square-foot roof replacement with asphalt shingles will cost DIY homeowners between $2,000 and $6,000; professionals will charge $5,000 to $12,000 or more for architectural asphalt shingles.
What’s the difference between architectural shingles and 3-tab shingles?
3-tab shingles are flat, and they have a single tab shape and size. They are uniform, which gives them a flat look. Architectural shingles are also referred to as dimensional shingles. This is because they provide a more dimensional look to the roof.
How long do 30 year architectural shingles really last?
The truth is, a 30-year shingle will not really last 30 years. The expected service life of a 30-year product, if properly cared for, is approximately 25 years. If it’s not cared for properly, that 30 year shingle will only last 12 to 15 years.
What color shingles last the longest?
Both light-colored and dark-colored shingles can last longer if given the necessary maintenance. The only thing tested and proven about light-colored shingles is that they help us keep the indoor temperature cooler in the hot summer season.
How long will 3-tab shingles last?
3-tab shingles have a manufacturer-specified lifespan of 25 years, while architectural shingles have a manufacturer-specified lifespan of 30 years. We like to say asphalt shingles should last around 80-85% of their maximum lifespan due to the factors that impact the life of a roof.
What is the longest lasting asphalt shingles?
The longest-lasting shingles on the market are laminated shingles with a lifetime warranty and fall into two categories: dimensional shingles, which have a standard architectural shingle pattern) and “luxury” shingles, which do a better job of approximating the appearance of shakes or slate shingles.
What type of roof lasts the longest?
The NAHB (National Association of Home Builders) rates slate as by far the longest lasting roofing material, with a life expectancy of 150+ years, followed closely by clay and concrete at roughly 100 years.
Are architectural shingles worth extra cost?
In a word, yes—the benefits of architectural shingles make the extra cost more than worth it. (Which, depending on your contractor, is around $15 per square. On most roofs, this results in the extra cost of $450.)
What is the price difference between 3-tab shingles and architectural?
Architectural shingles cost around 40 to 50 percent more than 3-tab shingles. However, they are usually a better option since they are twice as durable as the best-quality 3-tabs.
What is the difference between architectural shingles and asphalt shingles?
Durability. Three-tab shingles are relatively thin as they are made up of a single layer of materials. Architectural shingles, however, have two asphalt shingles stripes laminated together. This layering creates a shingle that is better suited to hold up against the elements.