The fascia is the stable wooden board that runs all around the edge of your roof. You’ve probably never seen it, as it is often tucked behind other parts of the edge of your roof, like gutters. But, on a flat roof, the fascia is the perfect spot to mount your railing system. Sure, you could install the posts right onto the rooftop. But mounting them from the edge has some key advantages that help you enjoy your rooftop space.
1. Space on the Rooftop
According to Homeadvisor, the average cost of a rooftop deck is $15-35 per square foot, depending on material costs. That’s reason enough to not waste any space on your deck.
When you mount your railing system’s posts on the fascia of the roof, the posts are actually off the edge of the roof. They don’t take up any of the square footage of the roof itself, which means you can use more of it. The space will feel bigger, and you will be able to fit more on it. While the half-foot or so you gain by moving just one post off the rooftop to the edge may not seem like much, it really adds up when you consider how many posts you’re moving.
2. Proper Drainage
On flat roofs, there is a slight pitch which directs water toward one edge of the roof. Here the drainage system that will catch it and bring it safely away from your building’s foundation. If you have rooftop-mounted posts, then these posts must necessarily be exposed to the water as it drains off the roof. When you have fascia-mounted posts, there is a small gap between the edge of the roof and the post. Water won’t collect around the post as it waits to be drained. Posts that are exposed to less water will have longer lifespans and be less likely to rust or to develop rot.