Manufacturer Warranty And Specifications
Some manufacturer warranties will not cover the metal roof if you install it over asphalt shingles. Some manufacturers may offer a warranty but exclude coverage for any problems that are related to the asphalt shingles. Make sure you understand the conditions of the warranty before you purchase the metal roof.
How Does Installing Metal Roofing Over Shingles Work
Before even starting the process of installing metal roofing over shingles, you need to contact local building officials to ensure it can be done. The majority of areas allow for a re-roof over one layer of shingles, while some do allow for a re-roof over two layers of shingles.
Youll want to get this sorted out immediately before you invest in researching a new roofer or worse yet, investing money into a roof you cant have installed on your home.
Can Architectural Shingles Be Installed Over Architectural Shingles
Several readers have recently asked me if they can have architectural shingles installed over existing architectural shingles during a re-roofing project. With the growing number of architectural shingles being used today its no wonder the question keeps coming up. So in this article Ill go over this issue and some of my thoughts on the subject.
You May Like: How To Repair A Trailer Roof
How To Install A Metal Roof Over Existing Shingles
Can You Install A Metal Roof Over Shingles
One of the biggest questions homeowners have when they start thinking about replacing their roof is whether or not they can install the new roof over the existing one. This question especially arises when the homeowner plans on replacing a shingled roof with a metal roof. So, can you put metal panels over shingles?
Don’t Miss: How Many Screws Per Sheet Of Metal Roofing
Pros And Cons Of Going Over Existing Roof Material
Q. I would like to know what the pros and cons are in regards to putting on a metal roof over your existing shingles versus removing the shingles, and also if the warrenty is any different if you leave the shingles on. Thanks for your time.
A. Like all such questions, more details are required before a definitive opinion can be offered. But I can give you some guidelines here and my free booklet expands on most of these.
Regarding the seond part of your question – installations of this type over approved substrates are covered by the manufacturer’s warranty and should in no way compromise the longevity and performance of the metal roof.Thanks for the interest, and good luck with your new roof project!
Question 1 Of : What Is The Best Way To Install A Metal Roof Over Shingles
Also Check: Average Shingle Roof Cost
How To Install Metal Roofing Over Existing Metal Roofs
McElroy Metal has developed several roof recover systems that contractors can also install over worn-out metal roofs.
For existing metal roofs that need to be repaired or replaced, our frameless 238T Metal-Over-Metal Recover System is our contractor customer’s favorite recover solution. This roof recover system is most often installed over existing thru-fastened panels. Because of the frameless design, material and labor costs are greatly reduced which allows contractors to offer this option to their customers at a price level competitive with single-ply roofing.
Another benefit of our recover systems is that they are considered a roof alteration and does not need to comply with current IECC requirements. Removing and replacing a roof requires that the building be brought up to current insulation requirements. This alone adds significant cost to a roof replacement project.
Finally, McElroy Metals 238T Metal-Over-Metal Recover System includes one more feature that makes it a tremendous value: a symmetrical standing seam. Symmetrical standing seam roof panels can be removed and replaced individually if damage ever occurs or if alterations such as curbs need to be added at a later date. This feature comes in handy for buyers in storm and hail prone areas.
Putting A Metal Roof Over Shingles
Its absolutely fine to install a metal roof over shingles. People are accustomed to thinking of metal roofs as being heavy or cumbersome. In fact, metal roofs are so beneficial because theyre very light. Theyre fast to install, and they come in large sheets rather than individual tiles.
When you install a metal roof over shingles, you actually get additional protection from the shingle roof as well as additional insulation. And having shingles under the metal roof can reduce some of the sounds that can transfer from a metal roof, though modern metal roofs have countered this problem very effectively.
Read Also: How Much Does A New Shingle Roof Cost
Can You Put A Metal Roof Over Wood Shingles
Metal roofs have become a popular choice for homeowners. They are durable and can last up to 50 years. But what happens if you have wood shingles? Can you put a metal roof over them?
A metal roof can be installed over wood shingles however, there are some things you need to keep in mind. Metal roofs are heavier than asphalt shingles, so you need to make sure your roof can support the weight.
Wood shingles and metal roofs are options for homeowners, but can they be combined? Wood shingles provide a natural look to your home, while the metal roof is more durable. In this article, Ill explore whether or not its possible to install a metal roof over wood shingles. First, let us explore the benefits of having a metal roof over wood shingles.
Is The Roof Decking In Good Condition
If the roof has large leaks or long-term leaks, your decking may be in poor condition, rotting, or soft. If you arent confident your new roof will be fastened into a solid, reliable deck, remove the shingles and underlayment. Thoroughly inspect the decking and replace any areas that are in disrepair.
Read Also: Hydrostop Cost Per Square Foot
Install The Edge Panels
The final step is to cover the side edges of the roof with edge panels, and then to cap the roof with a metal top covering.
Foam insulation strips come with every roofing order. They are to be placed along the top edge of the panels where the cap covers. Place the sticky side of the insulation strip down on the roof panel, and screw the top cap into place.
This prevents wind from driving water onto the top seam and bringing moisture into your home.
Attach the gutters if you had to remove them and the process is complete!
What Is The Best Way To Install A Metal Roof Over Shingles
If you wish to install metal roofing over shingles, its recommended to do it one of two ways. The first is to apply an approved underlayment over the old shingles. This is the fastest way to install but it doesnt provide the flattest surface for metal roofing installation. The second way is to install 1×4 purlins over the shingles. This is more expensive but will also be higher quality.
Contact A Top Metal Roofs Contractor
Do you want to change the look of your roof? Are you done with the shingles on your roof and want a new look for your roof? A metal roof is a great solution, and as we highlighted above, you can install a metal roof over your existing shingles. The benefits of a metal roof are worth giving metal roofing a chance. If you are ready to give this a go, talk to us and let us help you out with your metal roofing needs. Whether you need a new roof installed or an old one replaced, we top the list of Toronto and GTA roofing companies. We have numerous satisfied clients whose success stories testify to our expertise. Our services are unmatched, and we guarantee a roof that will last you a lifetime. Talk to us at , and we will professionally handle all your metal roofing matters.
How To Install Metal Roofing
If you choose to overlay a single layer of asphalt shingles there are quite a few things youll have to do to prep your existing roof properly.
Prepare Your Old Roof
Any portion of your existing roof that is already metal, which means valley tin, gutters, roof jacks, and chimney flashing, should come off. You can overlay the valleys and gutters, but youre asking for future problems if you do.
Cut back the shingles along the valley or gutter apron about two inches beyond the width of the metal. Pull the nails and metal off the roof. Remove all the roof jacks and any chimney flashing. You may be able to use the chimney flashing again if its not badly damaged.
Start With The Gutters
Following the manufacturers instructions, start with the new metal roof. If youre going through a layer of shingles, youll want self-taping sheet metal screws a little longer than the standard 1 5/8 screws used on new metal roof installations. The zip screws for the overlapping seams will still work fine.
Set the valleys/gutters in place with the roofing material provided in your metal roofing package. Make sure you dont screw or nail anything into the valley pan, the business end of the valleys. If water runs down it and it hits a screw, the water will find a path inside if you have an errant fastener in your valley/gutter assembly.
Lay Down The Roof In Complete Sheets
Don’t Miss: How Much Is A Shingle Roof Per Square Foot
Metal Roofing Can Work On Roofs With Low Slopes
It’s often believed that metal roofing is suitable only for roofs with a steep slope, but standing-seam metal roofing can work fine on gently pitched roofs. This type of roofing is installed in large sheets with seams that are raised and sealed tightly together to resist water. While some slope is necessary to ensure water run-off, most homes can accept metal roofing.
Ready To Switch To A Metal Roofing System
If youre thinking about upgrading your roof, you can count on the experience and expertise of Roof Crafters your Baton Rouge, LA metal roofing contractor. With a Class-A fire rating and exceptional impact resistance, our metal roofing systems are designed to withstand even the harshest weather conditions and boost the energy-efficiency in your home. Metal is far more durable than asphalt, slate, and wood and resistant to algae, mold, and rust. For all your Baton Rouge, Hammond, and the Northshore metal roofing system needs or to get a FREE estimate, get in touch with Roof Crafters today at .
Recommended Reading: How To Measure A Roof For Shingles With Valleys
Don’t Miss: Cost To Install Trusses
Metal Roofing Can Be More Cost
Although most metal roofing products carry warranties comparable to the very best asphalt shingles , in practice, metal roofs have been known to last 50 years or more. According to State Farm Insurance statistics, metal roofs routinely have a longevity of 40 to 70 years. It is therefore very rare for a homeowner to install more than one metal roof over the time he or she lives in the home. By contrast, a homeowner will likely replace an asphalt shingle roof two or even three or four times over a 50-year period. Overall, while the cost of a metal roof is more expensive than asphalt roofing , it can save money over a long period.
Are There Advantages To Installing A Metal Roof Over Shingles
Its not just convenience or expediency, though these things do matter. Installing a metal roof over shingles takes far less time than trying to remove the shingles first. But there are other advantages, such as reducing sounds, improving insulation, and increasing water resistance. Installing a metal roof over shingles can save you money because the original shingles dont need to be removed.
Read Also: What Size Nails For 7 16 Osb Wall Sheathing
Putting Metal Roof On Top Of Shingles
Metal roofing can be seen almost anywhere. Covering bus stops in the city, covering barns in the countryside, or covering undercover play areas. Metal roofs are often used in these cases because of their longevity, easy maintenance, and simple aesthetic.
During the last two decades, however, metal roofing has been growing in popularity for residential homes. The industrial-looking corrugated roof or simple standing seam metal roofing has been replaced by metal roofing systems made to look like slate, cedar shingles, and more. While its gaining in popularity, finding an experienced professional to install this type of roof can be a challenge.
Also Check: How To Remove Lichen From Asphalt Roof Shingles
Severe Hail Can Ruin Metal Roofing
Although metal roofs are considerably more durable and maintenance-free than asphalt shingles and other forms of roofing, they are not indestructible. There is one weather condition in particular that bodes ill for metal roofing: large hail. Aluminum and copper, in particular, can be susceptible to denting when hailstones approach golf-ball size. Steel is harder and fares better in hailstorms, but if you live in a region where such catastrophic hail can occur, be aware of this when considering metal. Pea-sized or even dime-sized hail is rarely a problem, but hailstones larger than this have been known to ruin metal roofs.
Then again, large hail can also destroy an asphalt shingle roof, so if you make sure to have good homeowner’s insurance that covers such storm damage, there is no reason not to install metal roofing.
You May Like: New Roof Cost California
Can A Metal Roof Be Installed Over Existing Shingles
This is the one question that a lot of homeowners keep asking. If you are one of them, we are here to answer your questions and assure you that yes, you can indeed install a metal roof over shingles.
Now that we have answered the big question, lets also look at how this can be done as well as what can potentially affect the installation process and avoiding any mishaps.
Pros Of Putting A Metal Roof Over Shingles
- Youll save on labor costs. Not removing the asphalt roof first results in less work for the contractor.
- Added insulation protection to your home by having extra roofing layers.
- Faster installation as less labor is required.
- Eco-friendly because the old asphalt shingles will not have to be thrown away.
Metal is an easy material to use when re-roofing because its a lightweight material. It weighs less than one pound per square foot. A new metal roof wont put a lot of extra stress on your home, even with your old asphalt shingle roof also still attached underneath.
Read Also: How Do I Know If My Roof Is Leaking
Can You Put Metal Roofing Over Asphalt Shingles
Most of the time you can however, there are some cases where you cant. First, check local building codes to determine if installing a metal roof over shingles is within code.
Keep in mind that most localities will not allow more than two layers of shingles on a home. So, if your house already has a double layer of asphalt shingles, you wont be able to install another layer on top of it. This rule is there for a reason. Three layers of roofing are simply too much weight for the roof to safely bear.
You can put metal roofing over asphalt shingles if the local building code allows and if you only have a single layer of asphalt shingles on the roof.
Can I Have Metal Roofing Installed Over Shingles
In short, it depends.
You’ll need to know a bit about your roof’s history to determine if you can have metal roofing installed over your existing shingles. How many layers of old roofs lay beneath the surface?
If you have two roof layers, most building codes will require you to remove and replace them with an entirely new one. However, if you have one layer of roofing only, then you could add another on top.
You should check with Calgary roofing experts to see if your roof is a candidate for metal roofing, especially if you want it installed over the shingles you already have.
Read Also: Cost Of New Roof California