In Canada, steel roof coatings are more important than roof colours. This protective finish on the steel roof is important in Atlantic Canada’s harsh coastal climate. A good contractor will evaluate all coating options and colours that affect the roof’s lifespan and heating bills.
Why coatings matter more than the steel itself?
The coating under your roof does the heavy lifting against Canada’s weather. With proper coating, your roof can withstand salt air and freeze-thaw cycles. It will also survive UV exposure, rain, and other harsh weather conditions.
Experienced contractors know the importance of coating quality. The coating affects whether your steel roof will last 30 years or more than 50 years.
The main coating systems
Here are some of the most popular coating systems in steel roofs:
Galvalume (aluminum-zinc alloy) –
This steel roof coating contains 55% aluminum, 43.4% zinc and 1.6% silicone. This material offers great corrosion resistance against salt air in the region. The aluminum offers a self-healing barrier that resists rust, even when the coating is scratched. It is cost-effective and a great choice for residential steel roofing. Ask the experts for quotes if you want. Type online “steel roofing installers near me” to find out who the leading experts are in the city.
Galvanized Steel –
Top roofing contractors also offer galvanized steel. For this, zinc-dipped steel is used for corrosion resistance. You will see this in farm sheds, agricultural buildings, and budget projects.
However, contractors don’t recommend galvanized steel for homes in Canada unless the budget is a constraint. The zinc coating offers protection, but it is not durable and does not retain colour well. It is not good for UV protection as well.
Painted Surfaces –
Painted finishes like Polyester Paint, SMP, and PVDF are widely used for home steel roofs. Polyester paint is cheaper and good for secondary structures. It offers decent weather protection, but it works for a decade or so
Silicone Modified Polyester (SMP) coatings are a great option for residential properties. At a reasonable cost, this material offers good corrosion resistance and excellent colour retention. It resists fading and chalking better than standard polyester. It is the contractor’s go-to recommendation for homes in Atlantic Canada.
PVDF coatings are a premium choice. These are 70% PVDF resin and 30% acrylic. This material offers the best chalk resistance, colour retention, and overall durability. PVDF coatings cost more than SMP, but they look new even after 20-30 years.
Colour selection with coating types
After selecting a coating system, you will need to choose a suitable colour. Contractors like artisanroofing.ca know which colours work best for specific coating types. Also, dark colours work differently from lighter shades.
Lighter colours reflect more heat, improving coating longevity and energy efficiency. Minor fading is less noticeable in lighter colours. Darker shades, on the other hand, cause more thermal expansion and put stress on the coating.
Wrapping it up
All steel roofing coatings are not created the same. It is the job of a good contractor to understand your home requirements, the local climate, and your budget to determine which roofing coating will work best for your home. You must choose the contractor and roof coating wisely.