Tracking Down Roofing Issues

Three Great Materials For A Low-Slope Roof

A low slope roof is, by definition, one that drops between 2 and 4 inches across a foot. While low-slope roofs are not as prone to drainage issues as completely flat issues, they do not drain as well as roofs with more of a pitch. So, when choosing a roofing material for a low-slope roof, it's important to keep this in mind. Here's a look at several roofing materials that work well for low-slope roofs.


EDPM stands for ethylene propylene diene terpolymer. It's a common choice for both flat and low-slope roofs in the US. This rubberized material is highly resistant to moisture, so it won't leak even if water tends to pool on its surface.

EDPM roofing usually comes in large sheets that are manufactured off-site. Your roofing contractor will unroll the material onto your roof surface and attach it with a special adhesive. EDPM is very affordable and easy for your roofing contractor to apply. However, its appearance is unappealing to many homeowners. It's black and looks somewhat like an inner tube.

TPO Roofing

TPO, or thermoplastic polyolefin, is a newer material that is becoming more common for low-slope roofs. It has a similar, rubbery texture to EDPM. Like EDPM, it is quite affordable and impervious to moisture damage. It won't corrode or break down in the presence of water. Many homeowners prefer TPO to EDMP because it is white, rather than black in color. This means it reflects more sunlight, leading to lower energy bills.

On the downside, TPO is a bit tricky to install. You need to find a roofing contractor with experience installing the material because if it's not installed correctly, it will wear out and deteriorate within a few years.

Spray Foam

Another option for your low-slope roof is spray polyurethane foam, or SPF as it is sometimes called. Similar to the spray foam used as insulation, this is a closed-cell foam that repels water. It's sprayed directly onto your roofing surface by a licensed applicator.

Spray foam is a good choice in areas where insulation is paramount, since it does a great job of blocking heat transfer. However, it's more prone to damage from branches and other debris than are the other types of roofing on this list.

To learn more about the best roofing materials for your low-slope roof, contact a roofing company in your area. They can look at your roof and let you know which materials are best for your unique situation.