Metal Roofs for Modular Homes
Metal Roofs Are Attractive
I’ve always found metal roofs attractive. They come in a variety of bright vivid colors and designs to complement any style home. In addition to a traditional vertical seam profile, they can be made to resemble slate, shingles, wood shake, or clay tiles.
Metal Roofs Are Durable
Metal roofs are especially popular in areas of heavy snow, since they’re strong and shed ice and snow much better than asphalt shingles. They’re also resistant to cracking, shrinking and eroding and can withstand extreme weather conditions including hail storms, high winds, and wildfires. Their durability is evidenced by the typical 30 to 50 year manufacturer warranty that accompanies metal roofs. The average mon-metal roof lasts under 20 years. This means that a metal roof will likely last about twice as long as an asphalt roof.
Metal Roofs Are Green
If you are considering building a “green” home, metal roofs are a better option than asphalt shingles. To begin with, they typically are made from 30-60% recycled material. If they need to be replaced many years down the road, the materials can be recycled. Compare this with conventional roofing products, including asphalt shingles, which contribute an estimated 20 billion pounds of waste to U.S. landfills annually. Metal roofs are easier on the environment even when replacing an asphalt shingle roof on an older home, since they can often be installed over the existing roof, eliminating the cost of disposal.
Metal Roofs Are Energy Efficient
Whether you select a light or dark color, a metal roof will lower your energy costs because it will reflect heat to reduce cooling loads in the summer and help retain heat in the winter. This is possible because metal roofs now utilize reflective pigment technology, which results in overall home energy efficiency and lower utility bills. A metal roof may also earn you discounts on your homeowner’s insurance. Better yet, it can increase the resale value of your home.
Five Myths about Metal Roofs
Since there is a bit of misinformation floating around about metal roofs, let me quote some facts from the Metal Roofing Alliance about five common myths.
Lighting A metal roof will not increase the likelihood of lightning striking your home. However, if your home were hit by lightning, your metal roof would disperse the energy safely throughout the structure. Since metal roofing isn’t combustible or flammable, it’s a low risk and desirable roofing option where severe weather is concerned, especially for lightning.
Noise A common misconception is that a metal roof will be noisier than other types of roofing. When installed with solid sheathing, a metal roof on your home will actually silence noise from rain, hail and bad weather, many times much better than other roofing materials.
Rust Today’s metal roofing systems are built to last. Steel metal roofing has a “metallic coating” made of either zinc or a combination of zinc and aluminum. This metallic coating prevents rust from forming and is bonded to the steel at the factory. Paint is then applied over the metallic coating to provide the long-lasting color homeowners desire
Dents In most cases, a metal roof can withstand decades of abuse from extreme weather like hail, high winds, and heavy snow. Today’s systems also have a 150-mph wind rating (equal to an F2 tornado), meaning your metal roof is also safe from wind gusts that can accompany hail storms.
Durability Many people think you can’t (or shouldn’t) walk on a metal roof, but the truth is that you can safely walk any metal roof without damaging it. Before you walk your roof, however, we recommend you talk to your installed or roof manufacturer first. They will have the details on how to walk the particular roof you have, based on the style you chose and your roof pitch.
Since modular manufacturers only offer and install asphalt roof shingles, you’ll need to have the metal roof installed on site by the general contractor after the modules are set on the foundation. During the set, it is critical that the general contractor help the crew protect the house against weather damage. Otherwise any water that finds its way past the unfinished roof will cause serious damage to those parts of the interior of the home already finished by the manufacturer.
For more information about heating and cooling systems, see Modular Home Specifications and Features and The General Contractor’s Responsibilities for Building a Modular Home in my book The Modular Home.