How many roof tiles do I need per m2 in the UK?

It depends on the tile type. Large format interlocking tiles (like Marley Ludlow Major) usually require ~10 tiles per m². Small format interlocking tiles require ~16 per m². Traditional plain clay or concrete tiles require ~60 per m².

What is the standard batten spacing for roof tiles?

For large interlocking tiles, the batten gauge (spacing) is typically between 300mm and 345mm. For plain tiles, the spacing is much tighter, usually 100mm. Always refer to the manufacturer's specific 'minimum headlap' for your roof pitch.

What size battens should I use?

In the UK, BS 5534 standards require 25mm x 38mm battens for rafters at 450mm centres, or 25mm x 50mm battens for rafters at 600mm centres. These must be 'graded' battens, usually identifiable by their blue or red pre-treatment.

Can I use tiles on a low pitch roof?

Standard plain tiles should not be used on pitches below 35 degrees. Interlocking tiles are better for low pitches, with some specialized 'low pitch' tiles capable of performing down to 12.5 degrees if the correct underlay and headlap are used.

How many roof tiles do I need per m2 in the UK?

It depends on the tile type. Large format interlocking tiles (like Marley Ludlow Major) usually require ~10 tiles per m². Small format interlocking tiles require ~16 per m². Traditional plain clay or concrete tiles require ~60 per m².

What is the standard batten spacing for roof tiles?

For large interlocking tiles, the batten gauge (spacing) is typically between 300mm and 345mm. For plain tiles, the spacing is much tighter, usually 100mm. Always refer to the manufacturer's specific 'minimum headlap' for your roof pitch.

What size battens should I use?

In the UK, BS 5534 standards require 25mm x 38mm battens for rafters at 450mm centres, or 25mm x 50mm battens for rafters at 600mm centres. These must be 'graded' battens, usually identifiable by their blue or red pre-treatment.

Can I use tiles on a low pitch roof?

Standard plain tiles should not be used on pitches below 35 degrees. Interlocking tiles are better for low pitches, with some specialized 'low pitch' tiles capable of performing down to 12.5 degrees if the correct underlay and headlap are used.

Roof Tile Calculator

Professional material takeoff for pitched roofs.

Total Roof Area (m²)

Remember to include both sides of a pitch.

Tile Type / Format

Roofing Takeoff

Pitch Tip: Interlocking tiles are ideal for low pitches (down to 12.5° in some cases), whereas plain tiles usually require a minimum pitch of 35° to ensure they remain watertight.

Roofing Science: Tiles, Battens, and Breathability

Structural Protection

The roof is your home's first line of defence against the British weather. Whether you are re-tiling a Victorian terrace or a modern extension, getting the tile count and batten gauge right is essential for both structural integrity and aesthetics.

Our **roof tile calculator** provides accurate estimates for the most common tile formats in the UK, helping you order materials with confidence.

Standard Coverage

Plain Tiles~60 per m²

Large Interlocking~10 per m²

Small Interlocking~16 per m²

Ventilation & Underlay

Tiling is only part of the system. Modern UK roofing standards require high levels of ventilation to prevent condensation in the loft space.

Ensure you use a **breathable roofing membrane** (LR underlay) and incorporate eaves ventilation and ridge vents. If you are using interlocking tiles, ensure they are mechanically fixed (nailed or clipped) according to the latest BS 5534 wind loading requirements.

Gauge & Headlap

The 'gauge' is the distance between the top of one batten and the top of the next. This is determined by the tile's length minus the required 'headlap' (the amount the tile above overlaps the tile below). For low pitches, the headlap must be increased to prevent water ingress.

Batten Selection

Only use roofing battens that are marked as being graded to BS 5534. These have been inspected for knots and grain defects to ensure they can safely support the weight of the tiles and a roofer's weight during installation.

Pro Tip: Wastage Allowance

Always order **5% to 10% more** tiles than your calculated area requires. Tiles are easily broken during transport and installation, and you will lose material when cutting tiles at valleys, hips, and gables.

Roofing & Tiling FAQ

Technical Disclaimer

Material estimates are based on standard linear coverage. Irregular roof shapes with multiple valleys, dormers, or hips will require significantly more cutting and specialized tiles (e.g. tile-and-a-half). Always consult a professional roofer for complex roof geometries.