If you’re considering installing a metal roof for your home, it’s important to look at the benefits and drawbacks of metal against other common types of roof materials such as asphalt, wood, and tile. We have broken down the procs and cons so you can make the right decision for your home.
Metal roof has a longer life expectancy than other types of roofs. Properly installed, a metal roof should last as long as the house, sealing out water, surviving high winds, and easily shedding snow. Metal is also resistant to fire, mildew, insects, and rot. Warranties vary widely, but most companies back their products for 20 to 50 years. The performance of a metal flashing is directly correlated to the type of metal or alloy incorporated, the thickness or weight of the material, and the protective coating applied.
Metal roofs are lightweight when you compare them with tile at 750 pounds per square or concrete tile at 900 pounds per square. Most varieties run from 50 to 150 pounds per square.
For a sheet metal roof, a waterproof membrane must be installed prior to the installation of metal flashings as a part of the metal flashing detail. To prevent leakage, metal flashings must be installed in a manner that will ensure water sheds away from the seams.
The leading causes of leakage from sheet metal flashings include the absence of a waterproof membrane under the flashings and poor transitional detailing. Most metal flashing installers have little knowledge of waterproof membranes or transitional detailing. An experienced roofer will install the waterproof membranes so you don’t have to worry about any leakage.
Some types of metal roofing materials may be applied over an existing roof without the need to tare or add additional structural support. In fact, if you’re building a house or an addition, you can often downsize or reduce the number of roof support members.
Most metal roofing materials come in multiple-shingle sections or in 12- to 36-inch-wide panels. An experienced roofer can install these quickly.
Metal flashings are fabricated from a variety of metals and alloys: Galvanized Steel, Galvalume, Zinc, Copper. The coatings used to provide rust protection include baked enamel, silicon, and kevlar among others. Steel and aluminum are by far the most common and sensible of available roofing materials because they are economical, hold paint finishes well, and are durable. Aluminum is a relatively soft metal, so it is more prone to denting and damage and it is also more expensive than steel. On the flip side, aluminum won’t corrode the way steel can if the finish is compromised.
To resist wind uplift forces, metal clips and concealed fasteners are used to secure the flashings to the building during the installation process.
Metal flashing details are only one part of the buildings envelope and must be incorporated into the design of transitional details to ensure the building is protected from wind and rain.
Metal roofs offer substantial household energy savings and much lower lifetime costs when compared to other roofing materials. Metal roofs are manufactured from as much as 60 % recycled materials and the extended lifespan translates to significant waste reduction.
The variables that go into metal roofing prices are many, so much so that it is not possible to quote an exact price without a detailed inspection first. Factors like current roof condition, shape, and slope all affect price. Also, property location and roof accessibility are important considerations.
In 2016, the average cost of installing a high quality roofing system was $22 000 CAD. Residential metal roofing product prices ranged from $7.00 to $12.00 per square foot installed. To calculate the ballpark cost for your home in 2017 you would need to multiply the cost of installed product by square footage of roof area.
This is obviously a lot more expensive than your average roof, however you most likely won’t think about your roof for the lifetime of your home.
Labour of course is also a major factor when looking at a metal roof. However since they don’t take as long to install as a traditional roof made of asphalt or tile, the labour won’t be that expensive. However, since metal roofs are uncommon, you should ask the roofer if they have experience installing such a roof before. You don’t want an inexperienced roofer trying to learn on your home. It can cost you time and more money than you expected.
If you do go for a metal roof, the last thing you need to consider is look. When installing a metal roof, you’ll first want to determine the fundamental design you want it to have. Residential metal roofing comes in two basic forms that are very different in appearance – sheet-like panels and shingles. Within these two categories, there are many variations, colors, and pattern.
The most familiar pattern of panel-style metal roofing, “standing-seam roofing,” has raised every 6 or 12 inches and is applied vertically on a roof and doesn’t attempt to look like anything other than what it is. It has a decidedly commercial look that is favored by architects for its clean, contemporary appearance. It is commonly used on homes ranging from mountain cabins to modern masterpieces but would look very out-of-place on a Colonial home.
Metal shingle-style roofing is quite different than sheet roofing. With this style, metal is formed into shapes that imitate Spanish tile, wood shakes, or slate. These shingles are typically given multiple-layer factory finishes that may include granulated-stone topcoats to complete the realistic effect.
If you’re considering a metal roofing upgrade, you have probably done a search online, only to find that most metal roofing companies shy away from the topic of pricing. In an effort to help property owners get a good idea of what a metal roof really costs and save them from potential price shock we suggest you give us a call at 604-261-1111 and we can guide you through the entire process.