Can a Metal Roof Be Installed Over Shingles
And then, you want to upgrade your current asphalt roof to a new metal roof, merely yous're on a tight budget. Later on some research or talking to a contractor, you've probably heard the possibility of installing a metal roof over your existing cobblestone roof.
But is this a good idea? Considering we want you to have all the important information most such a big determination, we're going to suspension it downwardly for y'all.
The squad at Nib Ragan Roofing has been providing the residents of Nashville with high-quality cobblestone and metallic roofs since 1990. We know what it takes to maximize the life of your roof. That's why we offer a lifetime warranty on our workmanship.
By the end of this article, you'll acquire if it's a good thought to install a metal roof over an existing asphalt roof and some warnings most doing so. And if you're however on the fence about which type of roof to choose, we developed a free quiz to help you even further.
The common residential roof types: asphalt and metal
Before we become to if you can install a metal roof over an asphalt roof, yous need to know a little near both.
Asphalt roofing
There are three types of asphalt roofs: 3-tab, dimensional, and luxury. While iii-tab used to boss the marketplace, dimensional shingles are the most common type installed on roofs today.
Luxury way shingles are just as heavily marketed as dimensional but are almost double the cost. To learn more about the cobblestone shingle roofs, read this article on the 3 types of cobblestone shingles.
Metallic roofing
At that place are ii types of metal roofs, a standing seam and a spiral-down panel. A standing seam metal roof arrangement is a series of panels that are locked together at the seams or seamed mechanically. This allows for panels to aggrandize and contract freely when the metal heats upwards.
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A spiral-down panel is just what information technology's called; it'southward screwed downwardly. The screws are screwed through the panel, which leaves no room for expansion and contraction. I would non recommend putting a screw-downwards panel over a heated space such equally your home or role due to its lack of expansion capability.
To learn more than near the ii metallic roof systems, read this commodity on metal roofs: continuing seam vs. screw-down panel.
Can you install a metal roof over your existing asphalt roof?
So, tin can you install a metal roof over your quondam asphalt roof?
The short respond is yes, you lot're able to roof over your old cobblestone roof with a new metal roof under the correct circumstances. Your current asphalt roof has to be almost the terminate of its lifespan and still lying down pretty apartment (no lifted or croaky shingles, blisters, or bumps). With that in mind, most roofs won't be good candidates because of the clothing and tear they get through during their lifespans.
As long as the new metallic roof is properly installed and your local roofing contractor does everything the right mode, it tin be washed without a problem. You'll be able to save upwards to 25% in labor costs by not tearing off your quondam asphalt roof, installing new underlayment, or the fees to dump the old covering materials.
So, yep, yous tin install a metal roof over your old asphalt roof. Withal, I wouldn't recommend it.
Considering I don't recommend it, you need to know how the 2 types of roofs compare to each other on important factors and then you can make up one's mind which one fits your needs.
iii warnings when installing a metal roof over an asphalt roof
Why wouldn't a reputable roofing contractor recommend installing a metal roof over your old asphalt roof? There are a few reasons, beneath you'll learn the iii warnings of covering over your sometime asphalt roof with a metal roof.
1. Your decking is covered up by your old cobblestone roof
Decking is the wooden boards that make upward the framing of your roof. These boards are what your roof and other components are installed on.
When you get a total roof replacement, your old roof is torn down to its decking. This gives your contractor a risk to inspect the decking's integrity to see if information technology can handle your new roof.
If you install a metal roof over your asphalt roof, there'south no opportunity to audit your roof'due south decking. If your contractor can't examination your decking'south integrity or inspect for rotten boards, it could lead to a costly problem down the road.
I understand everyone is on a budget, merely if you lot're investing in a metal roof you lot might too tear-off your old asphalt roof to avoid this problem.
2. Future roof leaks volition exist harder to runway
Your leaky cobblestone roof is covered up without taking care of the trouble when y'all put a metallic roof over it. Once h2o gets under your metal panels, it'll run down and beyond your old asphalt shingle roof.
The water will go on running until it gets to trouble areas and starts to leak within your home. Because these leaks come up from two unlike parts of two different roofs, they will exist very hard to runway and find.
With water running across and down your shingles, it'due south about impossible to find the origin of the leak in your roof. If you want to install a metal roof over an asphalt roof, enquire your contractor nigh the condition of your current roof and if a metal roof-over is a good choice for you.
3. You won't get to replace crucial covering materials
When you get a metal roof-over, you featherbed the tear-off process of getting a new roof. This volition save you coin, but you miss out on replacing crucial materials that are included in a full roof replacement.
For example, ane of these crucial materials is the underlayment. It's your roof organization'due south terminal line of defense for keeping your decking dry. When you roof over your cobblestone roof with a metal roof, you have to rely on the underlayment from your old roof. You also won't get the proper kind of underlayment specifically designed for a metal roof.
Roofing materials aren't meant to last forever. That's why if you're already going to invest in a metal roof, I recommend starting from scratch with clean decking.
To learn more than about the crucial materials that are replaced when you get a new roof, read this commodity on the 9 materials included in your roof replacement.
Should y'all get a metal or asphalt roof replacement?
At present you know you can install a metallic roof over an asphalt roof. You likewise learned 3 warnings about getting a metal roof-over.
Remember, while it can be done, I wouldn't recommend it. I understand everyone has a budget, but if you're investing in a metallic roof, y'all should tear off your one-time asphalt roof. To get the best quality roof possible, you should always showtime from clean decking and replace all the crucial roofing materials.
Afterwards reading this, practice you yet want to roof over your onetime asphalt roof with a metallic roof? If you don't, are you lot having trouble deciding between upgrading to metal or sticking with cobblestone for your replacement? Luckily, nosotros've developed a quiz to assistance you find the right roof for you.
The squad at Bill Ragan Roofing has been replacing both asphalt and metal roofs in the Nashville expanse since 1990. Our attention to detail and high-quality workmanship you lot go a new roof that lasts for decades. When you work with us, you lot'll never take to worry virtually your roof again.
To aid you observe the correct roof for your replacement, have this gratuitous Which Roof is Right for You lot Quiz.
Source: https://www.billraganroofing.com/blog/install-metal-roof-over-asphalt-roof
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