If you’ve decided that you’re going to install a metal roof at your property, there’s a lot to think about. And your first decision is which metal to choose. After all, there isn’t just one type of metal for your roof, and you can select from the likes of stainless steel, copper, lead, tin, galvanized, or galvalume metal.
In this article, we provide you with a detailed comparison of galvanized and galvalume roofing, introducing some of the pros and cons of each, as well as a cost comparison.
We end with our verdict on which is better to help you come to a decision about which material to use for your metal roof installation.
What is a Galvanized Roof?
Galvanized metal has been treated with a protective zinc coating, which prevents premature rust and corrosion from occurring. This makes it more long-lasting and economical than untreated metal and is, therefore, an ideal material to install on a roof. (Related: 7 Types of Metal Roofs: Which One Is Right For Your Home?)
The galvanization process has been utilized in the building industry for almost 200 years and was first patented by Stanislas Sorel in 1836. As such, galvanized metal is widely used on roofing projects all around the world.
Galvanized Roofing Pros & Cons
Pros
Cons
Galvanized Roofing Installation Costs
According to Home Advisor, the typical cost of a metal roof installation is $5,405 - $15,171. A galvanized roof with a steel core and zinc coating will cost you between $150 and $350 per square.
You will also have to factor in additional costs like installation, which could be anywhere between $5,000 and $12,000, as well as additional materials like fasteners and gauges.
A galvanized steel is a cheaper option than stainless steel, with the latter typically commanding anywhere between $400 and $1,200 per square.
What is a Galvalume Roof?
If you’re looking to install a metal roof at your property, another option is galvalume steel. A galvalume roof is one that has been treated with zinc (55%), aluminum (43.4%), and silicone (1.6%) to enhance its anti-corrosion properties.
Although it’s similar to galvanized metal, galvalume has several added benefits, as we introduce below.
Galvalume Roofing Pros & Cons
Pros
Pros
Galvalume Roofing Installations Costs
Home Advisor tells us that galvalume roofing is cheaper than galvanized steel, with most roofing projects costing somewhere between $70 and $200 per square.
As you can see from the table below, galvalume is one of the most affordable metal roofing options:
Material | Average Cost per square |
|---|---|
Stainless steel | $400 - $1,200 |
Galvanized steel | $150 - $350 |
Galvalume steel | $75 -$200 |
Tin (terne) | $350 - $1,000 |
Aluminium | $150 - $600 |
Copper | $800 - $1,500 |
Zinc | $600 - $1,000 |
Lead | $1000+ |
Ultimately, if you’re looking for a pliable metal roof that is affordable and has anti-corrosion properties, a galvalume roof is a great option.
The Verdict: Which is better – Galvanized or Galvalume Roofing?
The bottom line is that both galvanized and galvalume are good options for roofing projects, as they’ve both been treated to resist rust and corrosion. As for which is better, we’ve put together a simple comparison table below to help you decide:
Property | Galvanized | Galvalume |
|---|---|---|
Durability | 40–50 years | 50+ years |
Affordability | $150 - $350 per square | $70 - $200 per square |
Composition | Zinc | Zinc, aluminium, silicone |
Self-healing? | No | Yes |
We suggest that a galvalume roof provides better overall value for money and is much more durable than galvanized steel. Therefore, it’s an excellent material to choose for your metal roof, as you don’t need to worry about high up-front costs or repair costs as your roof is exposed to the elements.
It’s little surprise, then, that galvalume roofing projects are increasing in popularity, as more and more homeowners are realizing the benefits of this anti-corrosive roofing material.