Roof tile sizes how many roof tiles per square metre

Close up view of the roof showing valley ridge with Acme Single Camber used
Training and Technical Support Manager
Kevin is a training and technical support manager, specialising in roof tiles and slates.

Roof tile size: how many roof tiles are needed per square metre?

The number of roof tiles needed per square metre varies and can range from less than 10 for large format interlocking tiles  to more than 60 for plain tiles.

Kevin Taylor, Training and Technical Support Manager at Marley, notes that roof tiles come in a vast range of shapes and sizes, and roof structures can also vary greatly, so coverage will depend on the specific project. 

“The type of roof tile, the required minimum headlap and the batten gauge used on site can all affect the number of roof tiles required,” he explains. 

“Determining precisely how many roof tiles are needed for a project will require careful calculation based on all the relevant factors,” he advises.


Comparing roof tile sizes and coverage capacity

The table below can help you determine approximately how many roof tiles are needed per square metre for a project. Pantiles and interlocking tiles are usually larger than plain tiles, so fewer tiles are required. 

For a rough estimate of how many tiles are needed, multiply the size of the roof (in metres squared) by the roof covering capacity (see chart below).

So, for example, the calculation for a 100m² roof covered in Marley Acme tiles would be:
100x60=6,000 tiles

 Marley roof tile sizes and covering capacity
 Product Material Type Tile size (mm) Minimum headlap (mm) Maximum gauge (mm) Roof covering capacity (tiles/m²)
Acme Clay Plain 265 x 165 65 100 60 (100mm gauge)
Canterbury Clay Handmade plain 265 x 165 65  100 60 (100mm gauge)
Hawkins Clay Plain 265 x 165 65 100 60 (100mm gauge)
Lincoln Clay Interlocking pantile 3705x 250 75 300 14.9 (75mm headlap)
16.2 (100mm headlap)
Anglia Concrete Interlocking pantile 387 x 230 75 312 15.7 (75mm headlap)
17.1 (100mm headlap)
Ashmore Concrete Plain 267 x 333 77 190 17.5 (77mm headlap)
19 (92mm headlap) 
Double
Roman
Concrete Double Roman 420 x 330 75 345 9.7 (75mm headlap)
10.4 (100mm headlap)
Duo
Edgemere
Concrete Interlocking slate 420 x 330 75 (22.5° and above)
100 (below 22.5°)
345  9.7 (75mm headlap)
10.5 (100mm headlap)
Duo
Modern
Concrete Interlocking 420 x 330 75 345 9.8 (75mm headlap)
10.6 (100mm headlap)

Edgemere

Concrete Interlocking 420 x 331 75 (22.5° and above)
100 (below 22.5°)
345 9.7 (75mm headlap)
10.5 (100mm headlap)
Ludlow
Major
Concrete Interlocking 420 x 330 75 345  9.8 (75mm headlap)
10.6 (100mm headlap)
Ludlow
Plus
Concrete  Interlocking  387 x 230  75  312  9.7 (75mm headlap)
10.5 (100mm headlap)
Mendip Concrete  Interlocking double pantile 420 x 330 75 345  9.7 (75mm headlap)
10.5 (100mm headlap)
Modern Concrete  Interlocking  420 x 330 75 345  9.7 (75mm headlap)
10.5 (100mm headlap)
Plain Concrete  Interlocking  267 x 165  65 100  9.7 (75mm headlap)
10.5 (100mm headlap)
Riven Edgemere Concrete  Interlocking slate  420 x 330  75 (22.5° and above)
100 (below 22.5°) 
345  9.7 (75mm headlap)
10.5 (100mm headlap)
Wessex Concrete Interlocking 420 x 330 75 345 9.7 (75mm headlap)
10.4 (100mm headlap)

 

If the roof specification differs from the standard details (for example, batten gauge or headlap are different), please contact our technical team for advice.

Other types of tiles

When calculating how many roof tiles are needed for a project, Kevin also points out that specifiers should consider the other types of tiles and fittings that are required to complete the roof. 
“For example, depending on the type of roof tiles chosen, there may hip and valley tiles, verges, angle tiles, ridges, stop ends and ventilation tiles,” he explains. These products are available in a variety of colours, materials and designs to ensure compatibility with your roof tile of choice.

Roof tile sizes, amounts and other specification advice from Marley

As experts in roof tiles, Marley offers a complete roofing system with everything you need to build a safe, secure and attractive roof - and our products are backed by a market-leading warranty and excellent technical support

Our integrated solar tiles measure 1000 x 1686mm and 1134 x 1722mm respectively for the G1-335 and M10-405 panels. They can be installed in a landscape or portrait orientation and are easily combined using patented push-fit technology to create solar arrays of any shape and size. As well as this, the industry-leading 5mm panel spacing and hidden fixings give a high-end, sleek aesthetic to your solar roof.

Whether you need assistance determining the best roof tile size and type for a project or calculating how many roof tiles are required per square metre, our technical team is on-hand to answer your questions. Please contact us for specification help.