RAIN Home Visit Series – Getting water off the roof
This is the second post in the RAIN Home Visit series. It will answer that ‘where do I start’ question. Even though each property has its own unique drainage situation, there are still general guidelines that all homeowners should follow.
As mentioned in the first post – the most important questions for homeowners to answer is: when it rains – where does the water go?
Answering this question starts on the roof with the eaves troughs and downspouts. Before worrying about where and how to direct the water on the ground, you first have to make sure water is draining off the roof properly. During a heavy rain, take an umbrella outside and walk around the perimeter of the house, taking note of places where water is spilling over the eaves. Spillage and leaks may be from
i) old eaves that have moved, cracked, or pulled away from the roof,
ii) clogging caused by leaves, debris, and/or ice,
iii) not enough downspouts to properly drain the water.
Make note also of any water that is spilling out of the downspouts, which is the pipe that will take water from the eaves to the ground.
If either the eaves or downspouts are not working properly, water can spill out and pool beside the foundation. Allowing water to soak into the ground too close to the foundation is one of the main causes of moist/wet basements. On your walk around the house, make note also of any water ponding or pooling on the ground. In best practice, no ponding is acceptable, but a general rule of thumb is the closer this ponding is to the foundation, the more damage it can do. It is best to try and keep the area within 8-10 feet of the foundation as dry as possible.
Once the eaves and downspouts are working properly you have taken the first steps in protecting your property against water damage. From here, the next steps focus on what to do with the water once it makes its way through the downspouts.
The next post in the series will focus on i) ‘connected downspouts’, and why they are now widely considered malpractice in the industry, as well as ii) the importance of lot grading for adequate drainage, and iii) where and how to direct your downspouts on the ground.