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Author:
Arnoldtailor (NJ)
Hello all! I'm in the midst of a home renovation, and I've encountered a unique challenge where my roofing and plumbing systems intersect. My rainwater drainage system from the roof is supposed to feed into a rainwater harvesting tank, but I'm uncertain about the best materials and methods to ensure longevity and avoid leakages where the downpipes connect. Additionally, I'm contemplating incorporating a first-flush system to divert the initial dirty runoff. Has anyone here tackled both roofing and plumbing projects simultaneously, and can offer advice on seamless integration? Specifically, I'm interested in material recommendations, potential pitfalls, and any best practices you've found. Thanks in advance for any insights or resources you can share!
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Author:
bernabeu (SC)
? What does your architect say ?
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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638
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Author:
packy (MA)
there are plenty of charts on the internet concerning roof drainage piping.
example...
Select a reference of a roof drain size with hourly rainfall together with the roof area square footage you have estimated and then determine from the chart below how many roof drains you require. Example: Each 4" drain size in a 6" hourly rainfall area will accommodate drainage of 3,070 sq. ft. of roof area
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Author:
Arnoldtailor (NJ)
My architect gave me a basic idea, but thought it'd be good to chat with people who've actually done this kind of work. You know, get some real-life tips. Have you come across this before? Would love your thoughts!
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Author:
Arnoldtailor (NJ)
Oh, awesome tip! I'll dive into some of those charts. Didn't realize they broke it down so clearly. Thanks for pointing me in that direction. Do you have a go-to resource or website you'd recommend for this?
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Author:
packy (MA)
gotta be good with math for this.
convert square to round and multiply rain fall in inches per hour
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Author:
mimlifarzu (CT)
Mixing roofing with plumbing is a big job, especially when you're collecting rainwater. For pipes that last, think about using PVC or aluminum since they're tough and don't leak much. Adding a first-flush system to catch the dirty water at the start is a smart move.
Edited 3 times.
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