How much tile adhesive do I need per square metre in South Africa?

Standard tile adhesive coverage is 3–4 kg per m² for floor tiles using a 6mm notched trowel, and 3–4 kg/m² for wall tiles using a 4–6mm notched trowel. For large-format tiles (600×600mm and above), use a 10–12mm notched trowel which increases consumption to 5–8 kg/m². Tile adhesive is sold in 20 kg bags in South Africa. Divide your total kg requirement by 20 to get number of bags, then round up.

Tile Calculator South Africa | SA Property Tools

🔲 Last Updated: May 2026 · SANS 52004 Adhesive Rates

🔲Tile Calculator — South Africa

Total Tiling Area (m²) For multiple rooms, add areas together first

Tile Layout

Diagonal layouts generate more cut tiles

Tile Size — Select or Enter Custom

Grout Joint Width (mm)

Tile Thickness (mm)

Adhesive Type / Trowel Size

Large format tiles need more adhesive

Tile Price (R/m²) — optional Leave blank to skip cost estimate

Total Tiles to Buy (inc. wastage)

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Tiling Area

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Tiles per m²

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Wastage Tiles

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Adhesive Bags (20kg)

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Grout (kg)

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Tile Cost Estimate

⚠️ For planning purposes only. Actual quantities may vary with surface condition and laying pattern. Always buy 10% extra tiles and keep spare tiles for future repairs.

Tiling Calculations in South Africa

Getting tile quantities right before you visit the tile shop saves money and avoids the nightmare of running short mid-job — especially if the tile is from a limited batch and re-stocking is not possible. The calculation has three components: tiles (including wastage), adhesive (based on trowel size and tile format), and grout (based on joint width and tile dimensions).

Tile Size	Tile Area (mm²)	Tiles/m²	Notes
300×300mm	90,000	11.1	Small format — classic bathroom and kitchen wall
400×400mm	160,000	6.25	Popular budget floor tile
600×600mm	360,000	2.78	Most popular SA floor tile format (2026)
900×900mm	810,000	1.23	Large format — open plan living areas
600×1200mm	720,000	1.39	Slab-style — modern aesthetic, fewer grout lines
300×600mm	180,000	5.56	Common wall tile, also bathroom floor

Adhesive coverage — why trowel size matters

The size of the notched trowel determines how much adhesive is applied per m². A 6mm notched trowel (standard for 400–600mm floor tiles) uses approximately 3.5 kg/m². Larger-format tiles (600mm+) require a 10–12mm notched trowel at 5–8 kg/m² to ensure full coverage across the tile back — this prevents hollow spots and tile cracking underfoot. Many SA tilers also back-butter large tiles (apply a thin adhesive layer directly to the tile back) before placing them.

Grout — narrow vs wide joints

Rectified tiles (precision-cut to exact dimensions) can use 2mm joints. Standard porcelain and ceramic tiles need at least 3mm to accommodate size variations. Outdoor tiles and pavers typically use 5–8mm joints. Narrower joints require less grout but are less forgiving — any slight size variation becomes visible. For bathroom and kitchen floors in SA, 3mm joints with a matching grout colour is the standard specification.

Frequently Asked Questions

How many tiles do I need per square metre in South Africa?

Tiles per m² = 1,000,000 ÷ (tile width mm × tile height mm). For 600×600mm: 1,000,000 ÷ 360,000 = 2.78 tiles/m². For 300×300mm: 11.1/m². For 400×400mm: 6.25/m². Add 10% wastage for straight layouts and 15% for diagonal — always round up to the next whole tile and buy a few extra for future repairs.

How much tile adhesive do I need per m² in South Africa?

Standard floor tiles (400–600mm) with a 6mm notched trowel: 3–4 kg/m². Large-format tiles (600mm+) with a 10mm trowel: 5–7 kg/m². Adhesive is sold in 20 kg bags in South Africa. Divide your total kg requirement by 20 and round up. For a 30m² floor with 600×600mm tiles at 3.5 kg/m²: 105 kg ÷ 20 = 5.25 → buy 6 bags.

How much grout do I need for tiling in South Africa?

Grout consumption (kg/m²) = [(TileW + TileH) ÷ (TileW × TileH)] × JointWidth × Thickness × 1.6. For 600×600×10mm tiles at 3mm joints: [(600+600)÷(600×600)] × 3 × 10 × 1.6 ≈ 0.18 kg/m². For 300×300×8mm at 3mm: ≈ 0.35 kg/m². Wider joints and smaller tiles use significantly more grout.

Why do I need more tiles for a diagonal layout?

Diagonal layouts create a 45° cut at every wall edge — instead of a clean straight cut, each edge tile is bisected diagonally, losing roughly half the tile. Standard rooms with 4 straight walls need about 15% extra tiles for a diagonal layout vs 10% for straight. For rooms with alcoves, bay windows, or many corners, increase diagonal wastage to 20%.

What is the standard tile size in South Africa?

The 600×600mm format is the most popular SA floor tile size in 2026 for open-plan areas — larger tiles make spaces feel bigger, have fewer grout lines, and are easier to maintain. For bathrooms and kitchens, 300×600mm and 300×300mm wall tiles remain common. Large-format slabs (600×1200mm, 900×900mm) are increasingly popular in premium applications.

What type of tile adhesive should I use in South Africa?

For dry interior floors: standard Type 1 cement-based adhesive (SANS 52004 compliant). For wet areas (bathrooms, showers): Type 2 improved adhesive or Type 3 flexible. For large-format tiles or external tiling: Type 3 flexible to accommodate thermal movement. Back-butter large tiles (600mm+) with a thin adhesive skim in addition to the floor application to ensure full coverage. External adhesive must be frost-resistant in cold highveld climates.

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