Ordering a little extra material feels like the responsible thing to do. Nobody wants to be the crew standing in a half-finished room waiting on a rush delivery. But "a little extra" has a way of creeping upward over time, and at some point the cushion you built for safety turns into a cushion that's quietly pricing you out of jobs.
Why overage creeps up
Nobody sits down and decides to over-order by 20%. It happens one job at a time — a crew runs short once, so the next quote for a similar job gets a little extra built in "just in case." That becomes the new normal. A few jobs later, someone pads that number again. Nobody's tracking it, so nobody notices the standard overage has quietly doubled from what it used to be.
What too much overage actually costs you
It's not just wasted material sitting in a truck. It shows up in your bid as a higher number than a competitor who's pricing the same job with a tighter, more accurate overage. On a close job — and a lot of jobs are close — that difference is exactly the kind of thing that loses you the sale to someone whose numbers just look more careful.
What too little overage costs you
The opposite problem is more visible and more painful in the moment: a crew short on material mid-install, a rush order, a job that takes an extra day because material didn't show up until tomorrow. It's easy to see why shops overcorrect toward too much cushion after living through this once.
Finding the actual right number
The right overage isn't a personality trait of your shop, or a number you picked once and never revisited — it's specific to the material and the layout, the same way waste factor is (they're related, but not identical: waste factor is about cuts and pattern matching, overage is about buffer for the unexpected — damaged pieces, a slightly-off delivery count, a small measurement miss).
The only way to actually know your right number is to track it: how much extra did you order, and how much was actually left over, job after job. If you're consistently sitting on leftover material after every job, your overage is too high. If you're consistently placing rush orders, it's too low. Most shops have never actually looked at this pattern, because it means keeping a simple log of estimated-vs-actual material use — a small habit that pays for itself the first time it stops an unnecessary rush order, and keeps paying every time it tightens a bid enough to win a close job.