If conditions are right, new shingles laid over old ones can be just as attractive and durable as shingles laid on bare sheathing. Installation is easier than for a tear-off job, since you can use the existing shingles as guides for laying the new ones.
How many times can you roof over shingles?
As mentioned above, homeowners are legally limited to two layer of roof shingles. Therefore, if you already have two layers, you’ll need a full tear-off. Additionally, if your roof is severely damaged, it likely won’t be able to support the weight of a reroof and will need to be torn off.
Is it cheaper to roof over existing shingles?
It’s more affordable. Simply adding another layer of shingles doesn’t require as much labor as it would take to remove them first. Therefore, labor costs are much lower for overlay roofs.
What is one of the drawbacks to adding a second layer of roofing over a first?
One drawback of adding a second layer of roofing over the first is the inability to inspect the roof decking for damage, potentially leading to undetected issues that could worsen over time.
Can you put new roof shingles over old ones Related Questions
Is it bad to overlay shingles?
Overlaying shingles prevents roofers from properly installing water and ice leak barriers. If you live in an area with brutal winters or other environmental concerns, water leak barriers are essential as they ensure that ice doesn’t leak under the old shingles.
What is the average life expectancy of a shingle roof?
General life expectations of roofing materials: Asphalt Shingles (3 tab Shingles): 15 to 20 years. Asphalt Architectural Shingles: 20 to 30 years. Built-Up Roof: (tar and gravel) 10 to 20 years.
What is the difference between roof overlay and tear off?
Roof tear off is when the entire old roof is removed completely, and the new roof is installed in its place with all new materials. Roof overlay is when your old, existing roof remains in place and the new roofing system is installed directly over top of it.
Is a roof overlay worth it?
Advantages. Lower costs ‚Äì Because there’s so much less labor involved in simply installing new shingles over old ones, an overlay will cost you less than a tearout. Your roofer won’t need to rent a dumpster and deal with debris disposal regulations, so you’ll save on costs there, too.
Does my insurance company have to replace my entire roof if my home has discontinued shingles nerve damage from a windstorm?
Discontinued Shingles If the shingles on your roof have been discontinued and are no longer available, the insurance company will have to replace all the shingles on your roof even if only one shingle was missing.
Are roof overs a good idea?
Mobile home roof overs prevent damage to a healthy roof. However, if your roof isn’t in great condition, installing a mobile home roof over is like putting a band-aid over a serious wound. It may be a quick fix, but it won’t solve the underlying issue.
Is layering a roof bad?
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. This is especially true if you’ve overlayed your new shingles on top of warped shingles.
Will insurance cover a roof with 2 layers?
You will have problems filing insurance claims if you have a second layer of shingles on your roof because most insurance companies will not cover damage caused by two layers of shingles.
How do you put shingles over existing shingles?
Use a starter strip or cut pieces for a starter course. Rip-cut the starter strip or starter pieces so that they butt up against the second course of existing shingles and are even with the front edge of the existing roofing. Attach with nails along the top edge of the strip.
What are the cons to 2 layers of shingles?
Damage repairs: Two layers create a more complicated roof system. Decreased lifespan: A double-layer roof will not last as long as a single layer. Removal costs: When the time comes to replace your roof, having two layers will require more manual work.
How long will a roof overlay last?
An overlay is a viable option if the existing roofing materials have not already been overlaid. Home Reference.net notes that on average you can expect the overlay to last for fifteen or sixteen years.
What color roof lasts the longest?
From the above information, we can conclude that color doesn’t determine the durability of shingles. Both light-colored and dark-colored shingles can last longer if given the necessary maintenance.
How many hours does it take to replace shingles on a roof?
Replacing roof shingles is a long, loud job. Typically, a new roof installation is a two-day process, but it depends on the size of your roof. Some jobs can be completed in a day while others may take three. Whether your roof replacement will take one day or three, it will be very disruptive to your children and pets.
Do 30 year shingles really last 30 years?
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. That’s one of the big misconceptions in the roofing marketplace.
How many layers of roofing is OK?
In most states, you’re only allowed to have 2 layers of shingles on a roof for fire safety reasons. However, you’ll still see roofs that have 3 or 4 layers today. If you already have 2 or more layers, a contractor will recommend a full replacement.
How long will a second layer of shingles last?
The short answer: Before the existing roof leaks. Lifespans vary according to the type of roof. For instance, three-tab asphalt shingles last around 25 years, while architectural shingles last up to 30 years. A wood shingle roof can last up to 30 years, but individual shingles may need replacing before that.