How Flat Roofs Handle Drainage

Flat roofs are a staple for residential and commercial buildings around the country. Part of this is due to aesthetics, while in other cases, it may be a simple matter of necessity due to where the buildings are located and certain building codes. However, in order for a flat roof to be safe and effective, especially in areas like Colorado where weather can be harsh, there needs to be effective drainage for both rain and melted snow. This prevents pools of water from forming which can lead to leaks, ice formation, and even damage to the roof’s membrane. We’re going to profile some of your drainage options if you have a flat roof.

Your Drainage Options

Perhaps the most common option you have, especially if you’re dealing with an older home, is gutters. These are basically pipes attached to the edge of the roof that funnel water off of the roof and away from the foundation. These are considered to be some of the most cost-effective options around, but it’s important to note that you need to clear these regularly in order to let them do their jobs. Something similar to a gutter is a scupper. These are outlets put at the edge of the roof that drain water off the roof and away from the walls and foundation. These can be effective, but more so for rain than snowmelt. In addition, they work best with tapered insulation systems.

Your ideal option though could be interior drains. Placed around a roof, they help move water to the outside of a building via an internal network of pipes. By using a strainer at the top of the drains, these also minimize the amount of leaves and debris that gets into pipes. While these are efficient and visually appealing, there’s also a price component to consider.

What Should I Pick?

When you are debating on which of these options to choose, understand that for commercial cases, you should defer to the original building engineer whenever possible. If this isn’t the case, your best option is finding a roofer who can do all three and letting logistics guide your choice. If you are looking for a top roofing company in the Denver area, contact Horn Brothers Roofing today. We will be closed 12/21-1/7/2019 For Christmas and New Year.