Question 1

1. How many Double Roman roof tiles do I need per m²?

Accepted Answer

For standard double roman concrete tiles (usually 420mm × 330mm), you’ll typically need about 9.7 tiles per m², including the 75mm headlap. If you’re installing them with a 100mm headlap, the coverage is a bit more: about 10.4 tiles per m².

If you’re using clay Double Roman tiles (such as those made by Sandtoft) coverage may vary. Check the tile size, headlap and manufacturer guidelines.

Question 2

2. How many extra tiles should I order for waste, hips, ridges and cuts?

Accepted Answer

Regardless of the type of roof tile or shingle you’re using, it’s a good idea to order a surplus beyond your basic tiles-per-m² calculation. These extras cover hips, ridges, verges, cut tiles and breakages. Many guides recommend rounding up and ordering an extra 5–10%.

Question 3

3. How much are double Roman roof tiles?

Accepted Answer

Prices for Double Roman tiles depend on the material (concrete vs. clay), finish, colour and the supplier. Costs fluctuate with quantity and delivery, as well as by region. You can use Buildbuddy to compare supplier prices for Double Roman roof tiles and find the best deals.

Question 4

4. What’s the minimum roof pitch needed for double Roman roof tiles?

Accepted Answer

This very much depends on the material and headlap. However, for many concrete double Roman tiles (like those from Marley or Condron) the minimum roof pitch is 22.5° for smooth-finish tiles. For other options (like Sandtoft) laid with a 100 mm headlap, the minimum pitch may be as low as 17.5°.

Question 5

5. What type of roof underlay and fixings do I need when using double Roman tiles?

Accepted Answer

You should use a suitable air and vapour-permeable underlay, laid according to manufacturer instructions. For low-pitch installations of some concrete double Roman tiles (such as those from Crest), tiles need to be clipped rather than nailed.

Question 6

6. Do I need to adjust batten spacing or gauge for double Roman roof tiles?

Accepted Answer

Yes. The batten gauge and spacing should match the tile specification. The typical batten gauge for or concrete double Roman tiles is up to 345 mm for, for example.

Double Roman roof tiles

Marley Double Roman Concrete Roof Tiles - Dark Red (Pallet of 192)

Marley Double Roman Interlocking Concrete Roof Tile Smooth Brown (Pallet of 192)

Double Roman Interlocking Concrete Roof Tile - Tudor Brown

Marley Double Roman Concrete Roof Tiles - Antique Brown (Pallet of 192)

Marley Double Roman Concrete Roof Tiles - Mosborough Red (Pallet of 192)

Marley Double Roman Concrete Roof Tiles - Grey (Pallet of 192)

Sandtoft Double Roman Concrete Half Tile Rustic