What waste factor to use on a cut up roof?
Standard waste percentages do not apply to heavily cut-up roofs featuring lots of hips and valleys. Workers will not hold onto odd pieces for hours trying to reuse them, turning potential material savings straight into trash.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
- 1Contacting the manufacturer directly to review architectural plans
- 2Estimating higher waste percentages due to hips, valleys, and breakage
In their words
Unedited, most upvoted first, each linked to the thread it came from.
“I’m imagining the usual waste factors don’t apply here. This is for a cut up roof.”source ↗
MT-Estimator · r/Roofing · 1 upvotes
“How cut up? Lots of hips and valleys? 30% waste guys aren't going to hold onto a piece for 5 hours cuz it might work somewhere else its trash”source ↗
fRiskyRoofer · r/Roofing · 1 upvotes