Cool Metal Roof Options For Summer Energy Savings

May 9, 2024

Cool Metal Roof Options For Summer Energy Savings

As the days grow longer and the sun climbs higher in the sky, Canadians start preparing themselves for the hot days. We all know what’s coming: weeks of scorching heat, relentless sunshine beating down on our homes, and air conditioners struggling to keep up.

The result? An uncomfortably warm living space and energy bills that leave you wanting to hibernate until fall. But what if your roof could become your biggest ally in the fight for a cooler, more comfortable home?

This blog discovers metal roofs, exploring their science, benefits, and the various options available for Canadian homeowners. Let’s help you make a smart investment in residential metal roofs for a cooler and more sustainable future.

Why Metal Roofs?

Metal roofs have long been lauded for their durability, longevity, and low maintenance requirements. They can withstand harsh Canadian weather conditions, from heavy snowfalls to blazing summers. But did you know metal roofs can also be incredibly energy-efficient?

Unlike traditional asphalt shingles that absorb and retain heat, cool metal roofs are designed to reflect sunlight and solar radiation away from your home. This translates to a cooler attic, reduced strain on your air conditioning system, and, ultimately, significant savings on your energy bills.

How Cool Metal Roofs Work

The secret behind cool metal roofs lies in a combination of factors:

Reflective Coatings

Cool metal roofs are typically coated with special pigments or reflective films that boast a high Solar Reflectance Index (SRI) and low thermal emissivity (emittance). SRI measures a material’s ability to reflect sunlight and thermal radiation, while emittance indicates how efficiently it releases absorbed heat.

In simpler terms, a high SRI and low emittance translate to a roof that reflects most of the sun’s heat away from your home and radiates minimal heat back into the environment.


Proper ventilation plays a crucial role in maximizing the effectiveness of a cool metal roof. By creating an air gap between the roof panels and the roof deck, hot air trapped in the attic can escape, further preventing heat transfer into your living space.

Metal Type

Some metals are naturally more reflective than others. For instance, aluminum and Galvalume steel (a steel alloy coated with aluminum and zinc) are popular choices for cool metal roofs due to their inherent reflective properties.

Cool Metal Roof Options For Canadian Homes

When it comes to cool metal roofs, Canadian homeowners have a variety of options to choose from:

  • Standing Seam Metal Roofs: These are interlocking metal panels that create a clean, modern aesthetic. They come in a variety of colours, including light and reflective shades that maximize heat deflection.
  • Stone-Coated Steel Roofing: This option offers the classic look of slate or tile shingles with the benefits of metal. The stone coating provides additional insulation and can be formulated with cool pigments for enhanced energy efficiency.
  • Metal Shingles: These lightweight metal panels mimic the appearance of traditional asphalt shingles while offering superior durability and heat reflectivity.
  • Corrugated Metal Roofs: A popular choice for agricultural and industrial buildings, corrugated metal roofs can also be used on residential homes. They are a cost-effective option with good heat-reflective properties, especially when light-coloured finishes are chosen.

Choosing The Right Cool Metal Roof For Your Home

Selecting the perfect cool metal roof for your Canadian home requires careful consideration of several factors:

  • Climate: Consider your local climate. If you live in a region with intense summer heat, a cool metal roof with a high SRI is crucial.
  • Roof Pitch: The angle of your roof slope can influence your choice. Standing seam roofs are ideal for steeper pitches, while metal shingles or stone-coated steel can be suitable for both low-slope and steep roofs.
  • Budget: Metal roofs generally have a higher upfront cost compared to asphalt shingles. However, their longevity, low maintenance requirements, and energy-saving potential can lead to significant cost savings over time.
  • Aesthetics: Cool metal roofs come in a variety of styles and colours to complement your home’s architectural style. Lighter colours offer the best heat reflectivity, but darker options are still superior to traditional asphalt shingles in terms of heat absorption.

About Stahl Roofing

Stahl Roofing is a leading provider of high-quality metal roofing solutions across Canada. They offer a comprehensive selection of cool metal roof options, including standing seam, stone-coated steel, metal shingles, and corrugated metal roofs. Their team of experts can guide you through the entire process, from choosing the right cool metal roof for your home to professional installation.

Contact us today to discuss your cool metal roof options and unlock a cooler, more energy-efficient future for your Canadian home!