Exterior Renovation Services to Suit Your Needs

F.A.Q.

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Product Questions

  • What is the installed weight of a steel roof in comparison to other products?

    This is best answered by the following common product specifications: Note: Weight per Sq. (1 Sq. = 100 Sq ft.)

    Material Weight per Sq.
    Steel Roof 125 lbs.
    Standard (3-tab) Asphalt Shingles 190 - 215 lbs.
    Wood Shake/Shingles* 250 - 300 lbs.
    Heavy Weight Laminated Asphalt Shingles 290 - 430 lbs.
    Clay / Concrete Tiles* 900 - 1200 lbs.

    *The weight of cedar, clay, and concrete products are all dry weights. All three product categories will increase in weight when exposed to moisture.

Roofing Questions

  • What is the installed weight of a steel roof in comparison to other products?

    This is best answered by the following common product specifications: Note: Weight per Sq. (1 Sq. = 100 Sq ft.)

    Material Weight per Sq.
    Steel Roof 125 lbs.
    Standard (3-tab) Asphalt Shingles 190 - 215 lbs.
    Wood Shake/Shingles* 250 - 300 lbs.
    Heavy Weight Laminated Asphalt Shingles 290 - 430 lbs.
    Clay / Concrete Tiles* 900 - 1200 lbs.

    *The weight of cedar, clay, and concrete products are all dry weights. All three product categories will increase in weight when exposed to moisture.

  • How long does it take to install a steel roof?
    Usually only a few days. The complexity of the building’s roof scape (meaning the steepness of your roof, and the complexity of its overall shape) is the primary factor in determining the time required.
  • Does the colour fade on a stone-coated metal roof?
    Although sized with more precision, our products use the same stone granules used by asphalt shingle manufacturers for over 50 years. Its long history demonstrates that fading is not a problem. Over time, a slight change in colour may occur due to settling of airborne contaminants. However, periodic rain or washing of the roof with a garden hose will keep the roof looking new.
  • Will a steel roof rust?

    The steel substrate is protected from corrosion by layers of metallic and polymer coatings. Envi Roofing and Exteriors Ltd.’s stone-coated metal roofs utilize an advanced metal composite introduced in 1973 as aluminum-zinc-coated steel. The composite improved earlier metallic coatings by applying an aluminum-zinc alloy to the steel in a continuous hot dip process. The aluminum creates an inert barrier coat while enhancing the long-term performance of zinc and its ability to protect breaks in the coating.

    Galvalume-coated steel has repeatedly been shown to outperform the corrosion resistance of other coated metals in industry studies conducted over the last 20 years. This is why our products are backed by a 50-year limited warranty.

  • How do the granules stay bonded to the steel?
    Specially graded, non-oiled stone chips are used for all stone-coated metal roof products. These fine granules ensure long-term adhesion to the steel substrate and are embedded in a UV resistant acrylic polymer for a lasting bond to the steel substrate.
  • Can you walk on a steel roof?

    Yes. Some care must be exercised while walking on the roof, but note that roofers walk all over shingles during the installation process.

  • Will a steel roof make my home hot?
    No. A properly vented steel roof system moves air both between the shingles and the underlying deck as well as moving air from vents under the decking. Heated air is allowed to dissipate through the ridge line as cooler air is drawn through eave vents. Reduced energy bills can result from airflow both under and over the decking.
  • How long has stone-coated metal roofing been around?
    Stone-coated metal roofing has actually been around since World War II, when tar and sand was used to cover galvanized steel bunkers. After the war, the practice was commercialized and the first roofs were produced. The product technology today bears little resemblance to early practices due to advances in the chemistry in coatings.

Stone-Coated Metal Roof Questions

  • How long does it take to install a steel roof?
    Usually only a few days. The complexity of the building’s roof scape (meaning the steepness of your roof, and the complexity of its overall shape) is the primary factor in determining the time required.
  • Does the colour fade on a stone-coated metal roof?
    Although sized with more precision, our products use the same stone granules used by asphalt shingle manufacturers for over 50 years. Its long history demonstrates that fading is not a problem. Over time, a slight change in colour may occur due to settling of airborne contaminants. However, periodic rain or washing of the roof with a garden hose will keep the roof looking new.
  • Will a steel roof rust?

    The steel substrate is protected from corrosion by layers of metallic and polymer coatings. Envi Roofing and Exteriors Ltd.’s stone-coated metal roofs utilize an advanced metal composite introduced in 1973 as aluminum-zinc-coated steel. The composite improved earlier metallic coatings by applying an aluminum-zinc alloy to the steel in a continuous hot dip process. The aluminum creates an inert barrier coat while enhancing the long-term performance of zinc and its ability to protect breaks in the coating.

    Galvalume-coated steel has repeatedly been shown to outperform the corrosion resistance of other coated metals in industry studies conducted over the last 20 years. This is why our products are backed by a 50-year limited warranty.

  • How do the granules stay bonded to the steel?
    Specially graded, non-oiled stone chips are used for all stone-coated metal roof products. These fine granules ensure long-term adhesion to the steel substrate and are embedded in a UV resistant acrylic polymer for a lasting bond to the steel substrate.
  • Can you walk on a steel roof?

    Yes. Some care must be exercised while walking on the roof, but note that roofers walk all over shingles during the installation process.

  • Will a steel roof make my home hot?
    No. A properly vented steel roof system moves air both between the shingles and the underlying deck as well as moving air from vents under the decking. Heated air is allowed to dissipate through the ridge line as cooler air is drawn through eave vents. Reduced energy bills can result from airflow both under and over the decking.
  • How long has stone-coated metal roofing been around?
    Stone-coated metal roofing has actually been around since World War II, when tar and sand was used to cover galvanized steel bunkers. After the war, the practice was commercialized and the first roofs were produced. The product technology today bears little resemblance to early practices due to advances in the chemistry in coatings.