How many mosaic sheets per m²?

Standard 300×300mm mosaic sheets cover 0.09 m² each, so you need approximately 11.1 sheets per m². With 10% wastage, order 13 sheets per m². Mosaic sheets come on mesh, paper, or dot-mounted backing. Mesh-backed sheets are the easiest to install as they flex around curves and the mesh stays behind the tiles.

What adhesive for mosaic tiles?

Use a white flexible adhesive (C2 TE) for mosaic tiles — white is important for glass mosaics as grey adhesive shows through. Apply with a 3-4mm notched trowel for a thin, even bed. Rapid-set adhesive is recommended to prevent sheets sliding. For glass mosaics, use a specialist glass tile adhesive like BAL White Star Plus.

What grout for mosaic tiles?

Use unsanded (fine) grout for mosaic joints under 3mm. Epoxy grout is ideal for wet areas — it's waterproof, stain-resistant, and doesn't need sealing. Standard cementitious grout works well in dry areas. Apply with a rubber float, working diagonally across the sheets. Clean excess quickly — mosaic tiles have many joints and excess grout is harder to remove.

How do I cut mosaic sheets?

Cut between individual tiles using sharp scissors or a craft knife on the backing mesh. For cutting individual mosaic tiles, use tile nippers for simple cuts or a wet tile saw for precise cuts. Glass mosaics can shatter with nippers — score and snap or use a wet saw with a glass-cutting blade.

Can I use mosaic tiles in a shower?

Yes — mosaic tiles are excellent for showers, especially on curved surfaces and shower floors where the small tile size follows the fall to the drain. Use waterproof adhesive and epoxy or waterproof grout. Ensure the substrate is fully tanked/waterproofed before tiling. The many grout joints actually improve grip, making mosaics ideal for shower floors.

TradeCalculator

Mosaic Tile Calculator — Sheets, Adhesive & Grout

Calculate mosaic tile sheet quantities from area. Includes adhesive and grout for narrow mosaic joints.

Area to Tile

Splashback, feature wall, etc.

Sheet Size

Price Per Sheet (optional)

How We Calculate This

This calculator works out mosaic sheet quantities, adhesive, and grout based on the area to tile.

The formula

Sheets = Ceiling(Area ÷ Sheet coverage × Wastage)

Adhesive = Area × 2.5 kg/m² (3mm trowel)

Grout = Area × 0.5 kg/m²

For 5 m² splashback: 5 ÷ 0.09 × 1.1 = 62 sheets. Adhesive = 5 × 2.5 = 12.5 kg. Grout = 5 × 0.5 = 2.5 kg.

Frequently Asked Questions

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Last updated: March 2026

All calculations are estimates. Verify with your supplier.