Estimating
Waste Factor Reference
Working waste and overage percentages for plants, hardscape, and bulk materials — and when to adjust them.
Waste factors are not padding — they are the measured difference between calculated quantities and what a job actually consumes through cuts, breakage, compaction, edge losses, and replacements. Too low and the crew makes a supply run at 2 pm; too high and your bid loses to someone who measured. These are the working ranges we see across contractor accounts.
| Material | Factor | Driver |
|---|---|---|
| Trees (container) | 0 to 2 percent | Individually counted; overage only on large multi-tree buys |
| Shrubs and perennials | 2 to 5 percent | Handling losses, replacements, batch matching |
| Seasonal color | 5 percent | Tray damage, edge fills |
| Sod | 5 to 10 percent | Edge cuts; curved beds push it higher |
| Mulch and soil | 5 to 10 percent | Settling, uneven depths, edge feathering |
| Pavers — running bond | 5 percent | Perimeter cuts |
| Pavers — herringbone / diagonal | 10 to 15 percent | Every edge cut is angled |
| Patterned flagstone | 10 to 15 percent | Breakage and trimming |
| Irregular flagstone | 15 to 20 percent | Puzzle-fit losses; the last corner problem |
| Wall block | 3 to 5 percent | Cuts at corners, caps, and curves |
| Crushed base (compaction) | 15 to 20 percent | Volume loss under compaction — order loose yards to hit compacted depth |
| Decorative gravel | 10 percent | Settling into soil; fabric reduces this |
| Steel edging | 5 percent | Curve trimming and splices |
| Irrigation pipe and wire | 5 to 10 percent | Route changes, fitting losses, service loops |
Compaction is not waste — but you order for it the same way
Crushed base compacts to roughly 80 to 85 percent of its loose delivered volume. A patio needing 5 compacted yards needs about 6 loose yards delivered. That 15 to 20 percent is physics, not sloppiness, and it comes on top of any edge-cut waste. Gravel over bare soil similarly loses its first half inch into the ground — geotextile under decorative rock pays for itself in saved material alone.
When to adjust the ranges
- Go to the high end for: complex or curved layouts, diagonal patterns, inexperienced crews on the material, remote sites where a shortage means a 90-minute round trip.
- Go to the low end for: simple rectangles, repeat crews on familiar product, sites five minutes from the yard.
- Add a deliberate attic-stock line (2 to 3 percent) on dyed or lot-sensitive products — pavers, wall block — left with the client, from the same dye lot, for future repairs.
- Never absorb pattern changes inside the waste factor. If the client upgrades from running bond to 45-degree herringbone, that is a quantity change order, not waste.
Track your own numbers
These ranges are starting points. Log ordered-versus-used on five jobs per material and you will have factors calibrated to your crews, your patterns, and your sites — which is a genuine competitive edge in tight bids. Your order history in the contractor portal makes this a fifteen-minute exercise.
Returns note for planning: unopened palletized goods generally restock cleanly; bulk materials and cut or dyed-lot goods generally do not. It is one more reason measured waste beats guessed waste — see our return policy for specifics, and call the yard if you are unsure how a material restocks before you pad an order.
Waste factors also belong in the client conversation, not just the internal spreadsheet. A takeoff that shows the base quantity and the waste line separately, with a one-line reason for each, reads as rigor to a client comparing bids — and it heads off the awkward mid-job question of why the material delivered is more than the square footage they measured off a satellite photo.
Have a question about material for this job? Call the yard at (817) 431-9490 or browse live inventory.