Many homeowners install metal roofing because it’s low-maintenance and lasts for 40 to 70 years. However, this material can sweat, an issue where humidity builds up on the underside of the metal sheets. Here’s some information about why this moisture problem happens and how to address it before it causes structural damage.

What Causes Roof Condensation?

Moisture often develops at the highest point of a home because of limited ventilation. Metal roofing with low angles or many corrugations has a higher likelihood of developing this problem because the water can’t run down to the lowest part of the roof. Uninsulated roofs tend to sweat because the temperature of the metal roofing is below the temperature of the air, making water collect on the underside. 

How Does It Impact the Structure?

Prolonged exposure to moisture can corrode and rust metal roofing. This material is often coated with a sealant that reduces this risk on the exterior. However, it may not be sealed on the inside, making it more vulnerable to water problems. 

How Can You Prevent & Fix the Issue?

Homeowners should have insulation installed on the internal surface of the roofing to prevent condensation buildup. Spray insulation and bonded insulation work the best, as they don’t create gaps between the insulation and metal, which can trap moisture.

An anti-condensation layer made out of fleece can also be effective. This textured fabric absorbs condensation as it forms, preventing drips and reducing the risk of corrosion.

Having roof vents installed to exchange air from the inside to the exterior will lower humidity levels. Metal flashing around the vents will prevent leaks and protect the roofing.

If you need metal roofing installation or repair, contact Springer Roofing in Kearney, NE. They offer residential and commercial services for a variety of roofing materials and perform storm damage repair. Call (308) 237-4498 to schedule a maintenance appointment, or visit their website to learn more about their expertise.