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Had a contractor chew me out over my broom finish on a driveway last spring
He told me I was dragging the broom in straight lines instead of arcs and it was trapping water, so now I arc all my finishes even though it takes twice as long.
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terryw6718d agoMost Upvoted
Man, I used to think arcs were just for looks but that water pooling argument totally changed my mind.
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gavinb9718d ago
Feel you on that, Terry. I used to roll my eyes at people getting deep about drainage slopes, but seeing how fast a little standing water can wreck a flat surface over time changed my tune. It's one of those things you don't notice until you actually have to deal with the mess.
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joel_martinez18d ago
The drainage slope on my patio is only about 1/8 inch per foot and I haven't seen any pooling in 6 years. @terryw67 I think people get too worked up about water pooling on flat roof arcs. Most modern roofing materials are waterproof anyway, so a little standing water isn't going to hurt anything. Unless you're dealing with a serious design flaw where water sits for days at a time, it's probably fine. I'd worry more about proper flashing and sealant than the exact angle of an arc.
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