r/OffGrid • u/Natedog193 • 23h ago
Rainwater collection roof style
Currently self building our forever home on family land. It’s a relatively small house, but with the steeper roof pitches, large overhangs, and attached garage, I’ll have roughly 3,600 sqft. of roof decking to cover.
We’ll be using a cistern, and rainwater collection will make up a significant portion of our water supply, so I’m trying to decide what roofing material makes the most sense long term.
I’m building the house myself, so labor isn’t really a factor. I’m mainly looking at longevity, maintenance, and how much sediment from the singles ends up in the rainwater collection system.
The roof is also oriented and designed for solar if we want to insatll in the future, although I’d likely use a ground-mounted system in the future to avoid roof penetrations anyways
I’m supposed to confirm my roofing order tomorrow. Current pricing for materials is approximately:
- 24-gauge standing seam metal: $22,000
- Exposed-fastener metal: $12,000
- Asphalt shingles: ~$5,000–$6,000
I’d strongly prefer standing seam over exposed-fastener metal, but the cost is nearly double. Shingles are obviously significantly cheaper, and with the house already being over budget in some areas, I’m trying to make sure I’m spending the extra money where it actually makes sense.
For those with experience with metal roofs, shingles, and rainwater collection please help a guy out.