How much extra tile should I order for wastage?
Short Answer
Always order 10% more tile than the exact area you need to cover. This is the industry-standard wastage buffer and it accounts for:
1. Cutting waste (every wall and floor has corners, edges, plumbing penetrations and irregularities that force the fabricator to cut tiles).
2. Transit breakage (2-3% is normal even with careful packing).
3. Future repairs (you'll be glad to have a few spare tiles if a tile chips two years later - and the same batch may no longer be in production).
Bump it up to 15-20% if you're using:
1. Diagonal or herringbone layouts (more cuts = more waste).
2. Large-format tiles (1200x600 mm and above - every cut creates a bigger off-cut).
3. Patterned or directional tiles (Moroccan, terrazzo, wood-look) where the pattern has to be matched across the floor.
1. Cutting waste (every wall and floor has corners, edges, plumbing penetrations and irregularities that force the fabricator to cut tiles).
2. Transit breakage (2-3% is normal even with careful packing).
3. Future repairs (you'll be glad to have a few spare tiles if a tile chips two years later - and the same batch may no longer be in production).
Bump it up to 15-20% if you're using:
1. Diagonal or herringbone layouts (more cuts = more waste).
2. Large-format tiles (1200x600 mm and above - every cut creates a bigger off-cut).
3. Patterned or directional tiles (Moroccan, terrazzo, wood-look) where the pattern has to be matched across the floor.
Detailed Explanation
Ordering the exact square footage of your floor or wall is one of the most common mistakes in a tiling project, because it leaves zero margin for the things that always happen - cuts, breakage and a future repair. The industry-standard answer is to order 10% extra by default, and more for specific situations.
Why 10% baseline:
1. Cutting waste - every room has corners, edges, doorways, pipe penetrations and irregular dimensions, so the fabricator has to cut tiles to fit. The cut-off pieces are usually unusable elsewhere, so they're wastage. On a typical room this alone is 5-7% of the area.
2. Transit breakage - 2-3% of tiles arrive broken even with careful packing (tiles are fragile). This is normal industry-wide and absorbed by the 10% buffer.
3. Future repairs - if a tile chips, cracks or stains 2-3 years after installation, you'll want a spare in the same shade. Tile batches are produced in runs and the exact shade may not be available later - designs are sometimes discontinued entirely. A few extra boxes in storage save you from re-tiling a whole room over one broken piece.
When to order MORE than 10% - bump it to 15-20% for these cases:
1. Diagonal or herringbone layouts - diagonal cuts mean almost every perimeter tile is cut, and the off-cut shapes are awkward to reuse. Wastage easily climbs to 15-18%.
2. Large-format tiles (1200x600 mm, 800x1600 mm, slab tiles 1200x2400 mm) - each cut produces a larger unusable off-cut. Wastage often reaches 18-20%.
3. Patterned or directional tiles - Moroccan, terrazzo, wood-look planks, marble-look with veining all need pattern matching across the floor, which forces the fabricator to select specific orientations and discard tiles where the pattern doesn't align.
4. Multiple small rooms with many cuts (bathrooms, utility areas) - small rooms have a high perimeter-to-area ratio, so cut wastage is proportionally higher.
How to calculate: take the exact floor/wall area in square feet → multiply by 1.10 (or 1.20 for the special cases above) → that's your order quantity. Round up to the nearest full box, since tiles are sold by the box.
Why 10% baseline:
1. Cutting waste - every room has corners, edges, doorways, pipe penetrations and irregular dimensions, so the fabricator has to cut tiles to fit. The cut-off pieces are usually unusable elsewhere, so they're wastage. On a typical room this alone is 5-7% of the area.
2. Transit breakage - 2-3% of tiles arrive broken even with careful packing (tiles are fragile). This is normal industry-wide and absorbed by the 10% buffer.
3. Future repairs - if a tile chips, cracks or stains 2-3 years after installation, you'll want a spare in the same shade. Tile batches are produced in runs and the exact shade may not be available later - designs are sometimes discontinued entirely. A few extra boxes in storage save you from re-tiling a whole room over one broken piece.
When to order MORE than 10% - bump it to 15-20% for these cases:
1. Diagonal or herringbone layouts - diagonal cuts mean almost every perimeter tile is cut, and the off-cut shapes are awkward to reuse. Wastage easily climbs to 15-18%.
2. Large-format tiles (1200x600 mm, 800x1600 mm, slab tiles 1200x2400 mm) - each cut produces a larger unusable off-cut. Wastage often reaches 18-20%.
3. Patterned or directional tiles - Moroccan, terrazzo, wood-look planks, marble-look with veining all need pattern matching across the floor, which forces the fabricator to select specific orientations and discard tiles where the pattern doesn't align.
4. Multiple small rooms with many cuts (bathrooms, utility areas) - small rooms have a high perimeter-to-area ratio, so cut wastage is proportionally higher.
How to calculate: take the exact floor/wall area in square feet → multiply by 1.10 (or 1.20 for the special cases above) → that's your order quantity. Round up to the nearest full box, since tiles are sold by the box.
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