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Galvanized Roofing Cost Guide

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National Roofing Costs

$3 per sq. ft. Minimum Cost
$18 per sq. ft. Maximum Cost

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Galvanized Roofing Cost Guide

Whether replacing an existing roof or building a brand-new home, the roof should be a priority. The roof can be a big expense, but it's also a vital part of a dry, temperature-controlled and energy-efficient home. With so many different roofing types available on the market, narrowing down the options and selecting just one can be a struggle. Metal roofs are very popular, and one of the top metal roof options is that of galvanized metal roofing. Use this pricing guide for a better understanding of the pros and cons of galvanized metal roofing, a thorough explanation of the material, variations that can influence price and what every homeowner should know about the installation process.

The Costs

  • Average Minimum Cost of Galvanized Metal Roofing: $3 per square foot

  • Average Maximum Cost of Galvanized Metal Roofing: $18 per square foot

What is Galvanized Metal Roofing?

Galvanization is a process where metals, typically steel and iron, are coated with a layer of zinc in order to reduce or eliminate the potential for rust. Therefore, galvanized metal roofing is any roofing material that has been treated with a layer of zinc in order to last longer and age without rust. In most cases, when someone refers to galvanized metal roofing, they are specifically referring to an inner metal layer of iron and carbon alloy steel that has been dipped in a hot zinc bath and is now coated with a thin layer of the material. While far from the most common roofing material available on the market, galvanized metal roofing is becoming increasingly popular as a solid investment for the future. 

Advantages Galvanized Metal Roofing

Although galvanized metal roofs are more expensive than traditional shingled roofs, they bring with them a number of significant advantages including energy-efficiency, longevity, increases in resale value and design style. However, it is important to note that while galvanized metal roofing can seem pricey, it is still one of the most affordable metal roofs on the market, making it a smart choice for the savvy buyer. This style of metal roof can also be incredibly energy-efficient, especially in warm climates. By repelling rather than absorbing heat, it can help reduce the workload of the air conditioning system in the home and therefore reduce energy costs substantially. Thanks to the lifespan of metal roofs, investing in one can also increase the value of the home, which may be a benefit when the owner wants to sell one day in the future. Since galvanized metal roofing is covered in a layer of zinc, it will never rust, which is a huge benefit that is not always associated with metal roofs. Finally, galvanized metal roofs are attractive, and they are versatile enough to work on very contemporary houses as well as with more traditional or rustic structures.

Disadvantages of Galvanized Metal Roofing

Unfortunately, not everything about galvanized metal roofing is ideal. This material does not last as long as other types of metal, it is more challenging to install than traditional materials and it is very heavy. As mentioned previously, the cost of galvanized metal roofing is also a big consideration for homeowners. While not as expensive as other types of metal roofs, galvanized steel is still a big investment, and it may not be suitable for those who plan to flip the home or sell within the next five years. On average, galvanized metal roofs can last 50 years or longer when properly maintained, but that still isn't as long as some kinds of steel or aluminum roofs. Since galvanized metal weighs upward of one pound per square foot, the large sheets used in roofing can be incredibly heavy, and installation is not typically something that can be done without professional assistance. 

Choosing the Thickness of the Roof and Its Coating

Many homeowners don't realize that galvanized metal roofs can come in several variations, and these will affect both price and durability for the buyer. Thickness of the steel itself will be something to consider, and so will the thickness of the zinc coating. Generally, the thickness of the galvanized metal roofing as a whole will be referred to as its gauge, and that number might range from 20 to 30. The higher the gauge, the thinner the material will be, and the thinner the roof's profile will be. For most residential homes, the gauge of galvanized steel roofing should be either 24 or 26. The thickness of the zinc coating is also important. A thin coating could result in rust over time, but a thick coating costs more and may be unnecessary. Homeowners typically want to look for a zinc coating thickness of G-90, which translates to 0.9 ounces of zinc used in the coating of every square foot of metal. Lower G-ratings are available, but these are not sufficient for homes and should be skipped, even if they have the potential to lower the price of the roofing project.

What Homes are the Right Candidates for Galvanized Metal Roofing

When deciding whether their house is the right candidate for a galvanized metal roof, homeowners will have a lot of things to consider. Here are some of the key things to think about when making the decision:

  • Galvanized metal is not ideal in coastal locations because corrosion can occur.

  • Galvanized metal roofs are durable and perfect for hail-prone areas.

  • This material is heavy, may not be DIY-friendly and often requires professional help.

  • Galvanized metal roofs are best for those who want to live in the home long-term.

  • Galvanized metal roofs are suitable for anyone who wants minimal maintenance in the future.

What Homeowners Should Know About Installation

Installing a galvanized metal roof is a big project, and it is not something that a homeowner without experience should tackle on their own. If an old roof needs to be replaced, that process can take one to two days, and then installing a new roof can take an additional two to three days. Adding in any insulation or having a steep pitch to the roof will also drive up the costs and should be budgeted and discussed when choosing a professional roofer for the job.

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Last updated on Nov 8, 2018

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