Serving New Braunfels, TX & surrounding areas

Galvalume Roofing

New Braunfels Galvalume Roofing

Galvalume is primarily used to protect iron-based alloys that are prone to rust.

Galvalume-coated steel is better able to resist oxidation than plain carbon steel because the zinc and aluminum protect the underlying steel from the environment. The zinc also will more readily oxidize than the steel it contacts. This is similar to galvanized steel.

Reasons why New Braunfels TX homeowners are choosing galvalume steel as their roofing material:

  • Premier metal roofing choice
  • Longest lasting of any roofing material, longevity is 100+ years 
  • Highly resistant to corrosion
  • Withstands Strong Hail and High Winds
  • Withstands Torrential Rains
  • Fire Resistant
  • Prestigious and attractive appearance
  • Instantly increases curb appeal
  • Recyclable, sustainable and eco-friendly
  • High Thermal conductivity, like aluminum, keeps a home warm in winter and cool in the summer.
  • Light Weight, reducing the amount of stress being put on a home’s structure.

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What is Galvalume Steel?

Since Galvalume is a registered trademarked brand, people might tend to think it’s just a branded form of the same old galvanization.

Actually, its coating consists of both aluminum and zinc alloys, with a mixture of 55% aluminum, 43.4% zinc and 1.6% silicone.

This coating means that one material has the properties of each type of coating. Since its introduction in the early 1970s, Galvalume’s popularity has steadily increased.

By the early 2000’s it had captured over 90 percent of the metal roofing industry because of the durability and corrosion resistance improvement it offers.

Advantages of a Galvalume Roof

Corrosion resistance

Galvalume roofing is about two to four times more corrosion resistant than galvanized metals. The roofing is expected to last as long as 50 to 60 years with little corrosion.


Galvalume is touted as one of the most affordable of metal roofing materials. Although price fluctuates, Galvalume can sometimes be cheaper than galvanized metal. Price ranges from $5 to $15 per square foot, depending on the thickness, quality and color.

Self-healing properties

Steel has a tendency to rust at the cut edges where the coating is non-existent. Galvalume products have self-healing properties that help control this problem. Not only that, although a small bit of rusting at the cut edges is normal, it will eventually stop with a Galvalume coating.


Galvalume has a 25.5 perforation warranty on the material, and roofing systems often also come with a substrate and paint warranty, as long as the product is not installed within 1,500 feet of saltwater. In addition, commercial customers are eligible to purchase a weathertight warranty, ensuring that the roof was correctly installed according to strict details.

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What's the cost?

Copper roofing tends to be one of the more costly options when looking at metal roofing. Metal roofing costs more upfront to purchase and install than traditional asphalt shingles, but it lasts a long time.

However, copper increases the value of your home and will last for a long time. One of the excellent benefits of copper roofing is that the copper itself never really loses its value. From 2009 to 2019, copper has nearly doubled in price, showing how well this metal appreciates.

Roofing prices always vary by location so you can contact us in the New Braunfels, Texas area for more information about copper roof installation/replacement and get a FREE Estimate

Disadvantages of Galvalume

Interactions with some materials

Galvalume roofing should not be installed in situations where it could come into contact with copper, iron, treated lumber, bricks or concrete. An electrolyte such as water can then cause galvanic corrosion of the metal. If the material is in contact with one of these and then it rains, you may have a problem.

Oil canning

This is seen as distortion or waviness in flat surfaces. It’s only a visual phenomenon that doesn’t affect the system’s performance or strength, but it can be worrisome to those not familiar with it. It’s a good idea to discuss this with your contractor in advance. He can keep that in mind when selecting the roofing material and will handle the material the best way to reduce this. He can also use bead stiffeners or striations in flat areas to help prevent this from occurring.

Climate restrictions

While Galvalume holds up better than galvanized metal as far as corrosion resistance, it still is not recommended for areas close to saltwater. The salt spray or salt in the air humidity can gradually overpower the anti-corrosion coating.

Galvalume roofing can be used in both commercial and residential buildings and some agricultural buildings.

However, it is not recommended for any buildings in which animals are housed, such as animal shelters or cattle barns.

Animal manure will produce ammonia gas over time, which reacts to the Galvalume coating. The coating will eventually break down and the corrosion-resistant properties lessen. Galvalume roofing has been used successfully on some chicken houses built with a vapor barrier between the roof and interior to allow for ventilation, but other metals may be a better choice. The manufacturer can answer questions about this.

Galvalume is a choice worth considering as its popularity shows. As always, consult your New Braunfels roofing experts on what materials might be best for your particular roof situation.