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Can You Put A Metal Roof Over A Shingle Roof

The Cost Of Each Metal Roof

Can You Put a Metal Roof Over a Shingle Roof?

The cost of a metal roof will vary based on the size and how many materials you need. The type also affects the price, for example, steel roofs tend to be less expensive than aluminum ones. Take some time to research what kind of material will best fit your budget as well as which type is most durable if durability is a concern.

S To Follow When Installing Metal Panels Over Shingles

Start by laying down roofing felt

This has to be done so that you get a straight and flat foundation. Bear in mind youll have to install flashing for chimneys, dormers, or seams where the accumulation of moisture is a concern.

This layer of underlayment is important because the metal roof will contract and expand according to temperature fluctuations. If theres no protective layer between the asphalt shingles, which are rough, and the metal roof, this can damage the metal.

Install the metal roofing

Keep the edges straight when installing the metal panels. Check that the screws are running in a straight line. Its a smart move to apply the screws on either the flat surface or the raised roof ridges. The screws need to secure the metal so they will have to be as straight and symmetrical as possible.

Install a 2×4 frame

Underlayment is important but its not enough. This is why installing a 2×4 frame of lumber parallel to the roofs eaves is important. It will support the metal panels on the new roof.

Tip: Measure the length and width of both roof sides and ensure you have enough 2×4 frames that can run parallel to the roof eaves in increments of 24 inches. Start at the eaves and secure the 2x4s to the current roof with the use of screws or nails.

Install your edging

If your eaves have gutters, the flashing needs to hang over the gutter lip by approximately ½ an inch.

Other Things To Know About Metal Panels

Here are some tips to bear in mind.

Metal Roof Over Shingles Condensation

Metal roofs must be laid flat on a vapor barrier because steel will condensate if theres any air space underneath it. It doesnt matter if the air space is a half-inch or six inches because the condensation factor will remain the same. Put the steel down directly on a vapor barrier. You can either leave the shingles on or put down felt paper during new construction.

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Advantages Of Metal Roofs Over Shingles

Theres already plenty of advantages by choosing a metal roof, and theres even more when you decide to put a metal roof over shingles. They include:

Advantages of metal roofs in general:

  • Metal roofs have increasingly become a more popular option for homeowners due to their reputation for longevity and curb appeal.
  • They can last much longer than shingles. In fact, they can last for about 40-70 years depending on the material.
  • They can withstand almost any type of weather condition to keep your home safe, comfortable, and dry. Rain will quickly and easily drain, and snow will be able to melt slide off easily. They can also sustain wind gusts up to 140 mph.
  • Many of them also come with the ability to resist fire and withstand a hail storm without taking damage.
  • They can come in a wide variety of colors and finishes. These include the appearances of natural cedar shakes or stone.
  • They can improve your homes energy efficiency by reflecting solar radiant heat, which may even reduce cooling costs by 10-25%.

Advantages of metal roofs over shingles:

  • Metal roofs over shingles will also provide an extra layer covering your home, helping to further insulate it.

Is Metal Roofing Worth The Cost

Metal Roof Over Shingles Problems #Roofing #Roofers ...

This really depends on how long term youre thinking. In the short term, shingle roofs are cheaper than metal. However, that changes as you consider longer periods of time.

Metal roofs will last much longer than shingles. That alone improves the value of the metal roof. The fewer replacements you make, the more it saves you. This also applies to the durability of your roof. You will save money on repairs with metal.

Additionally, metal roofing will save you money on cooling your home. It may not be much per year, but these things add up over time.

If you arent planning on living in your house very long, then go with shingles. However, if you plan on living there for a long time, metal roofing will be the best choice you can make.

All of the benefits of metal roofing apply whether installed on their own or over shingle roofing.

Read Also: How Much Is A Shingle Roof Per Square Foot

Contact Southern Roofing Systems For Installing A Metal Roof Over Shingles

Installing a metal roof over shingles is not cheap or easy. It takes experienced professionals who have dealt with the right tools, materials, and procedures to ensure your home remains waterproofed through all seasons of weather! Southern Roofing Systems have the tools and materials needed to provide you with a new roof as well as an installation team who can do everything from removing your old surface to creating a beautiful design on top of it!

Contact Southern Roofing Systems today for a free inspection! We offer free estimates and 100% satisfaction for all of our customers.

You Wont Get To Replace Crucial Roofing Materials

When you get a metal roof-over, you bypass the tear-off process of getting a new roof. This will save you money, but you miss out on replacing crucial materials that are included in a full roof replacement.

For example, one of these crucial materials is the underlayment. Its your roof systems last line of defense for keeping your decking dry. When you roof over your asphalt roof with a metal roof, you have to rely on the underlayment from your old roof. You also wont get the proper kind of underlayment specifically designed for a metal roof.

Roofing materials arent meant to last forever. Thats why if youre already going to invest in a metal roof, I recommend starting from scratch with clean decking.

To learn more about the crucial materials that are replaced when you get a new roof, read this article on the 9 materials included in your roof replacement.

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How To Estimate The Cost Of Your New Metal Roof

Of course, the cost of a metal roof also depends on the size and shape of your roof, your local market rates, the type of home you have, and any other special conditions such as unique climate or weather factors like wind damage on your roof.

The thickness of the metal roof, the roof type and quality of the paint finish that you choose, and the unique shape, details, and other factors that make your roofing project unique all play a role in the cost of your roof as well.

All of that said, you can begin to estimate based on the aforementioned costs and start to assume that your new metal roof will cost around $12.00 $13.00 per square foot, and a typical single-family home requires between 1,500 2,000 square feet of metal roofing , so you can assume that your new roof will cost between $18,000 $26,000.

There are less expensive or cheaper metal roofing options like corrugated steel or ribbed steel as well.

Read on to learn more about the various types of metal roofing, which range from high-end standing seam metal panels to metal shingles and everything in between.

The most important thing is to find something that fits your budget, style and will provide the best protection as the literal roof over you and your familys heads.

Can You Put Steel Roofing Over Asphalt

Considerations When Installing Standing Seam Metal Over Shingles

Can you avoid tearing off your old asphalt shingle roof by putting a steel roof over it? Maybe. Most codes now allow no more than two layers of roofing before requiring a complete tear-off. So, if your roof has two layers, it may require a complete tear-off, even though steel is lighter than asphalt. Codes vary, so call your local building department to know how to install metal roofing over shingles properly, code-wise.

Also Check: How Much Do New Shingles Cost

Talk With One Of Our Roof Specialists To Be Sure

The only way to know for sure if youll be able to install a metal roof over shingles already installed is to have the roof inspected by a licensed roofing contractor. Here at Livingston Roof Pros we can add a new metal roof to your home over the old shingles. But well first consult with you to let you know of the problems that you might face. We can also give you a free roof estimate in Livingston Michigan. Be sure to contact us today at 517-940-8770.

    • August 29, 2016 at 10:55 am

      These factors should be kept in mind while installing a roof. Thanks for the differentiation.

    • Buddy M. Dietz

      May 10, 2018 at 6:55 am

      Nice comparison and Ideas regarding on selecting the best roofs to be installed. In my end if I can afford the best one then Ill go for it.

    Can You Install Metal Roofing Over A Shingle Roof Without Furring Strips

    It is not recommended to install metal roofing over shingles without furring strips. The thermal expansion and contraction of the metal will rub against the shingle granules and the metal will corrode from the underside. The gaps introduced by furring strips also allow air venting which can reduce moisture.

    Also Check: Add Overhang To Side Of House

    Should You Install A Metal Roof Over Shingles

    A common trend today is to get metal roofing installed on your home. Even home owners with asphalt shingle roofs consider getting metal installed simply because they like the look and style of metal roofing. There are advantages and disadvantages to using metal roofing when compared with asphalt shingles which Ill go over later in this article. But, most home owners want to know if they can add a metal roof over shingles that are already installed on their homes. Unfortunately, there is no definitive answer and each case or home is different. Ill go over some of the things that can affect the installation of a metal roof over shingles below.

    Is The Roof Decking In Good Condition

    Can You Put Metal Roof Over Shingles

    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.

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    Can You Install A Metal Roof Over Asphalt Shingles

    People have been installing metal roofs over layers of asphalt shingles for decades in fact, it used to be common practice and likely would have been considered wasteful in terms of time and energy not to do it. This practice is done less and less with asphalt on asphalt shingles, yet many people still find it acceptable to bury a shingle roof under a metal roof.

    There are pros and cons to most methods for home improvements, and roof-overlays are no exception. On the positive side, not tearing off the old asphalt shingle roof when installing metal roofing can save time and money. It can also arguably increase the R-value of the roof and act as an increased sound barrier. On the flip side, not tearing off the additional layers of the current roof increases the load of the roof, void or reduce manufacturer warranties, may impact the aesthetics of the new metal roof, and keep serious construction issues hidden.

    Here are the benefits and disadvantages of installing a metal roof over an asphalt shingles roof, along with things you might not have considered and, ultimately, whether you should do it or not.

    Your Shingle Roof Should Be In Very Good Shape

    Now, most building departments in every state will be happy to comply with the installation of Metal Roofing on top of regular shingle roofs, but there are safety caveats to consider. It is important for the Roofing Company to check and make sure that the plywood of the existing roof is in good enough shape.

    There shouldnt be any soft spots which later buckle under the weight.

    While you might assume that the building department is trying to make your life harder, the fact is that safety is always a major concern. A metal roof is installed using screws and needs to be held on to something. If the plywood is soft and the screws cant stay in because of it, then your roof could break. A thunderstorm or a bit of wind could blow the roof away.

    Present Building Codes

    Now, in Florida, there are some Municipal Building Codes that have clearly stated that homeowners cant have more than two layers of roofing. One reason for this was when the trusses of most homes were engineered they could only hold on to a certain amount of weight.

    If there are too many layers of Roofing Material, there is a good chance that the truss will fail. Thats why in some counties, it is imperative to remove all existing roofing material, regardless of the layer before a new roofing layer can be built.

    But even then wed advise that you get the roof examined by the roofing company to ensure that it can hold up to the stress of an additional layer.

    Final Word

    Also Check: Roofing Costs In California

    Metal Roofing Over Existing Shingles Applications

    While recover options arent always the best solution for every roof, a roof recover system can be an ideal solution for many, and weve completed a lot of recover projects over the years. From schools to airplane hangers, you can check out some of our recover projects in our .

    If youd like to learn more about the details of some of our roof recover applications, check out these resources:

    Metal Roof Over Asphalt Shingle

    Metal Roof Install Over Shingles

    Client wanting to upgrade shingle roof to metal. Wondered about leaving on the shingles. Whats your thoughts?

    Thanks in advance.

    According to the manufacturer you can do this and save money, but, tearing off a roof isnt that expensive, you can check for problems before covering with a 50 year roof and why go cheap on such an important area of your home?

    I will let them know. What do you think Paul, another $800?

    down here in hail country the shingles act as softer underlying surface, thus allowing more noticeable impact dents & damage to the metal than solid decking

    also as the metal is installed and surface coating is scratched from granule abrasion it becomes more prone to rusting from the undersidetrapped condensationmay not be as bad or a concern in arid climates

    Install radiant barrier, install 1″X4″ battens, install metal.

    Wouldnt do that on my house but its common.

    I was correcting the poster he used furring and my intention was to let him know there were purlins. I can see how you came to that conclusionWhere it comes to metal roof they are called purlins. Ill change it Thanks

    No, Im not talking about Perlins when you initially construct the roof, Im talking about furring strips on top of the existing asphalt shingles. There is a difference.

    But you call Them what you want.Just dont put words in my mouth!

    Install 30# felt on rest of roof.

    Install metal panels.

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    How To Install Metal Roofing Over Shingles Or An Existing Metal Roof

    Installing metal roofing over existing shingles is an excellent way for contractors to help building owners not only maximize the longevity of their new roof but also to save on roof tear off expenses. There are billions of square feet of roofing on commercial and industrial buildings in the United States. Much of it in need of roofing repair as most contractors know and see every day.

    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.

    Also Check: Adding Gable Overhang To Existing Roof

    Can I Install A Metal Roof Over My Old Shingles

    Can I install a metal roof over my old shingles? Kreunen Construction of Olive Branch, MS answers these questions. Metal roofs provide a series of extraordinary benefits over asphalt shingles roofing. Some years ago, they were an innovation. Now, thanks to their durability and energy efficiency, they have become an extended roofing option across the US.

    However, their installation costs make some homeowners think twice before deciding to install them. That is why many of them wonder: Can I install a metal roof over my old shingles?

    Initially, the answer is yes. It is something possible. But, if you plan to make this switch, you should know how it is this process. Besides, consider some important implications that may turn this project into a bad idea.

    Dont worry we are here to bring you the answers you need.

    Metal Roofing Is Impervious To Fire Rot And Insect Damage

    Can You Install a Metal Roof Over Shingles?

    One of the principal reasons metal roofing has exploded in popularity is that it is virtually fireproof. With the dangers of wildfire on the rise, metal roofing has become the roofing material of choice in many parts of the country. And not only that:

    • Insects such as termites can never eat metal roofing.
    • Metal roofing is impervious to rot and mildew.
    • Since it conducts heat quickly from the sun, snow slides off more quickly than with conventional roofing.

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