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Residential Metal Roofing: Is It Right for Me?

When the contractor delivered the sad news that my roof needed replacing, that led to a discussion of material choices. I was surprised to hear that metal roofing was an option. Sure, it was fine for commercial buildings, but a home? My contractor told me that metal is used for homes more than people realize. The panels can be designed to look like just about any type of roofing you can imagine. After looking at some samples and finding out about the long life of metal roofs, I decided to give it a try. Fifteen years later, my roof is still in great shape. If you are facing a roof replacement in the near future, let me tell you more about metal roofing. I'm betting that you'll decide this solution is right for your home.

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Residential Metal Roofing: Is It Right for Me?

How Poor Ventilation Can Lead To Roof Damage

by Kelly Murphy

Poor roof venting leads to several problems, including poor energy efficiency for the HVAC, but did you also know that it can lead to roof damage? Here are four ways in which poor ventilation can cause roof damage:

Roof Material Damage Due To Overheating

As you probably know, poor ventilation places more stress on your air conditioning system since the house will be overheated. However, this isn't the only effect of overheating; it can also lead to roof damage. When the roof overheats, its materials weaken and become susceptible to damage. For example, wood shingles may crack, asphalt shingles may melt, and roof trusses may warp if exposed to too much heat.

Rust Due To Too Much Moisture

Poor venting may also cause the metallic parts of your roof to rust. If your roof isn't properly ventilated, moisture may collect on the underside of the roof during the cold season. This happens when the hot air inside the house rises and meets the underside of the roof, which will be cold due to the snow or ice on the roof. The moisture-laden hot air then condenses and affects the metal on your roof, which may then weaken and give way prematurely.

Moisture Damage Due To Ice Dams

Ice dams form when the hot air inside the house rises and warms the roof. The snow or ice above the roof then melts and runs down to the edges of the roof that are still cold, where they refreeze. The frozen water then traps more water behind it forming a dam. The weight of the ice dam may damage your gutters or cause water to backup and penetrate the roof.

Roof Damage Due To Mold

Mold on the roof is another thing to expect if you don't ventilate your roof properly. This is because poor ventilation increase the amount of moisture on the roof, and mold thrives on moisture. Most people find moldy roofs unsightly, but that isn't the only disadvantage associated with mold on the roof. The mold acts like a sponge and soaks up water, which may then wick its way under the shingles and damage the underlayment. By trapping moisture, the mold will also make your roof (the parts made from wood) more susceptible to rot.

Therefore, you should consult your roofing contractor if you suspect your roof is poorly ventilated. Don't delay until the roof becomes too damaged and necessitates a serious repair or replacement budget.