Flooring is bought by the box, and you always buy more than the bare room area. The waste factor covers the cuts, the mistakes, and the spares you will be glad to have years later. Skimp on it and you risk a half finished floor and a frantic search for a matching box that the store no longer stocks.
Standard waste
For a straight layout in a simple rectangular room, add about 10 percent. This covers the cuts at the walls, the occasional damaged plank, and a few spares set aside for future repairs. It is the right starting point for most laminate, vinyl plank and hardwood jobs.
When to add more
- Diagonal layouts waste more at every edge. Use 15 percent.
- Herringbone and chevron patterns cut a lot of material. Lean toward 15 percent or higher.
- Long narrow rooms produce more end cuts than open squares.
- Rooms with many corners, closets and angles waste more than a clean rectangle.
- First time installers should add a few percent for learning curve mistakes.
- Natural hardwood with grain and colour variation may need extra so you can sort and set aside odd boards.
Waste factor at a glance
| Situation | Add |
|---|---|
| Straight layout, simple room | 10% |
| Diagonal layout | 15% |
| Herringbone or chevron | 15 to 20% |
| Many angles, closets, jogs | 15% |
Worked example
A 200 square foot room with a standard layout: add 10 percent for 220 square feet. If each box covers 20 square feet, that is 220 divided by 20, which is 11 boxes. Always round up to whole boxes, never down. The same room in a diagonal layout would need 230 square feet, or 12 boxes.
Buy by the box and keep spares
You cannot buy a partial box, so round up. Just as important, keep at least one unopened spare box after the job. Flooring products get discontinued, and even the same product from a different batch can vary slightly in shade. A stored spare lets you repair a damaged plank years later with a match rather than a patch that stands out.
Check the box coverage
Box sizes vary widely between products, from under 20 to over 30 square feet. Always use the coverage printed on the specific product you are buying, not a generic figure, or your box count will be off. Two products covering the same room can mean a different number of boxes, so confirm before you order.