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A Guide to Interlocking Roofing Tiles


30th January 2018

Interlocking technology is a relatively new style of roof tile that combines traditional designs with innovative modern techniques. This guide will give you all the basics so you can decide if interlocking tiles match the requirements of your build. Read on for information about the benefits of interlocking roof tiles. This includes the potential costs involved, as well as additional information which will be of use when using interlocking tiles.

What Are Interlocking Roof Tiles?

The primary difference to standard tiles is found in the connecting mechanism that joins together each tile on the roof. Manufacturers have been able to continue producing tiles that replicate the traditional concrete and clay styles while integrating new locking technology that makes the installation of roof tiles a much easier process.

Sandtoft Lindum Concrete Tile - Roof Stores
Sandtoft Lindum Concrete Tile

Interlocking tiles can be smooth or granular either flat or profiled. They can be laid in a single lap or broken bond laying pattern which enhances the strength of the roof. Interlocking tiles are generally larger than standard plain tiles which reduces labour intensity and costs. This is why installation companies prefer to work with them wherever possible.

Advantages of Interlocking Tiles

There were three main reasons behind the introduction of interlocking tiles. The first, and as usual the most common factor, is cost-effectiveness. From manufacturing and end-user perspectives, the use of interlocking tiles is a cheaper option. They are also more eco-friendly, manufacturers are able to produce this style at more sustainable levels.

The effect on labour is also a positive one, especially for volume house builders in the UK. Interlocking tiles are large format and require fewer tiles per square metre. The tiles also simply click together which means fewer tiles to install and a shorter completion time. This also lowers labour costs for companies who can invest more in other areas of the project.

The final reason is their versatility. They can be manufactured to look like concrete, clay or even slate and allow for use on lower pitches. This has enabled the pitch level to come down to 15°, or even further. Depending on the technical make-up of the property, the Forticrete Centurion Standard interlocking tile can be installed a pitch as low as 10°.

Types of Interlocking Roof Tiles

As is the case with many of the styles of tile available on the market, concrete leads the way. However, the integration of this interlocking technology into other materials has made them more accessible for customers.

Redland Fontenelle - Roof Stores
Redland Fontenelle

Below are the main types of interlocking tiles available.

  • Interlocking Plain Roof Tiles: Popular with self-builders and homeowners who are thinking of re-tiling their home, they retain the traditional look and style. The Forticrete Gemini Interlocking Plain Concrete tile is a good example of this classic look. It has all the advantages that large modern tiles should offer, adding value to the property and reducing unnecessary costs.
  • Interlocking Clay Roof Tiles: There is always a demand to add some finesse to the design of a roof, which is what clay material adds in abundance. Sandtoft’s 20/20 tile is renowned not only for its handsome finish but because it comes in at a lower cost than a plain concrete tile.
  • Interlocking Concrete Roof Tiles: As you would expect, interlocking concrete tiles offer the most variety and thus remain the popular choice. You can pick up the traditional looking Russell Highland Concrete tile with its flat profile, or you can even choose a double roman interlocking tile or a pantile such as the Sandtoft Shire Pantile Concrete tile.

How Much Do Interlocking Tiles Cost?

This section is intended to provide you with an idea of the level of pricing for interlocking tiles which can range from approx: £0.77 to upwards of £7.00 per tile. To see the most up to date prices for individual products, follow the links below or visit our interlocking tiles page.

Russell Highland Interlocking Tile - Roof Stores
Russell Highland Interlocking Tile

Interlocking tiles tend to be cheaper to buy than almost all other varieties. This means that money is saved at both the purchasing and installation stages. A closer look at some of the examples we provided above demonstrates their value in terms of money and attributes.

Interlocking Tile Price Examples

Sandtoft’s 20/20 tile is one of the most popular interlocking clay tiles on the market and a very affordable price point it’s easy to see why. For those looking for authenticity at a price that won’t break the bank, this is an ideal option.

One element of interlocking tiles that may deter some buyers is the large format effect. The Redland Mockbond Mini Stonewold cleverly navigates that with its mock bond that gives the impression that there are in fact two tiles present instead of just one. Another reason for their popularity is that they can be bought at is a very persuasive price point.

The Koramic Tempest 44 tile is a one-of-a-kind on the market because it is the only single roman clay tile available to buy. It’s a very attractive option which maintains a charming and natural style without a huge outlay.

For those who find the slate aesthetic appealing, the Marley Modern tile offers visual and installation benefits and is very reasonably priced. It can also be laid at a minimum pitch of 17.5° for added flexibility.


Sandtoft Clay 20/20 Interlock Plain LH Tile & Half (Verge)

Sandtoft Clay 20/20 Interlock Plain LH Tile & Half (Verge)

Sandtoft 20/20 Interlock Tile & Half, LeftHand. Sold in a variety of colours. Available for delivery across the UK. Buy online now.
Buy online now

How Many Interlocking Tiles Per Square Metre?

Getting your estimates right from the early planning stages saves time, effort and money in the long run. Once you have measured your roof, you can assess the tiles that need laying economically to keep you on budget. The table below shows how many of each tile may be needed to complete your new roof.

Type Size Square Metre Coverage
Forticrete Gemini Interlocking Plain Concrete Tile 270 x 337mm 16.3 tiles per m²
Redland Stonewold Mk2 Concrete Slate 430 x 380mm 8.2 tiles per m²
Russell Highland Concrete Tile 418 x 298mm 9.8 tiles per m²
Sandtoft 20/20 Tile 330 x 226mm 22.7 tiles per m²
Sandtoft Shire Pantile Concrete Tile 380 x 230mm 16.4 tiles per m²
Sandtoft Calderdale Concrete Slate 420 x 334mm 10.6 tiles per m²
Sandtoft Double Pantile Concrete Tile 420 x 334mm 10.6 tiles per m²
Marley Ashmore Concrete Tile 267 x 333mm 17.5 tiles per m²


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