All roofs have some kind of drainage system to prevent your roof from holding water and debris which can cause damage and deterioration to the roofs membrane often leading to leaks. On a sloped roof the concept is straight forward, the water runs down hill and the gutters control the direction and flow of the water to downpipes as it leaves the roof system. On flat roofs the system is not as straight forward and can often require more attention. There are different types of drainage systems including scupper, overflow and internal drains for flat roofs. Most flat roofs have an internal drainage system that is placed strategically throughout the roofs surface to allow the water to leave. These drains are connected to pipes that run through the building taking water to the ground.
This time of year with falling leaves landing on your roofs your drains are especially susceptible to getting clogged. Despite what you might read online it is very important that you don’t attempt to unclog roof drains on your own. Snaking a drain without the proper knowledge can dislodge and loosen internal pipes causing leaks and internal damage. Something as simple as removing leaves and debris from around your drains improperly can cause pipes to burst and in turn unimaginable internal damage can occur. Some things are best left to the professionals!
Whether you have a flat or sloped roof system it is important to have your drains inspected and cleaned on a regular basis. Just as flat roof drains can get clogged, drains in gutter systems and downpipes on sloped roofs can get clogged with debris as well. This can cause your gutter system to hold water which is never a good thing. When gutters hold water and gutter drains are plugged you are no longer able to control the flow and direction of water leaving your roofs system. This will often lead to gutters over flowing and depending on the severity this can cause leaks on sloped roof systems.
The best way to prevent clogged roof drains, be it flat or sloped roofs, is to have regular maintenance performed on your roofs. This will included drain cleaning and inspection to make sure that your drains and drain screens are secured and functioning properly. Now that we are into the winter season it is especially important to speak to your roofing contactor to see if you require additional semi annual drain inspection and cleaning, especially after storms with heavy wind or rain. In doing so you will help mitigate the effects of clogged drains and in turn flooded roofs which leads to damage of your roof system.