Redland 49 tiles per m², gauge and battens (chart for 10 to 150 m²)
Redland 49 covers 17.7 tiles per m² at a 282 mm gauge (below 30°) (BMI Group, Redland 49 tile product page, pitched roof characteristics, read 2026-09-20), and 16.3 at 307 mm from 30°. One batten every 282 mm up the slope is 3.55 m of batten per m². The calculator's starting roof, a 12 m by 9 m gable at 26.6° (120.7 m² of roof), takes 2,351 Redland 49 tiles with 10% waste, 472 m of batten and 27 ridge tiles.
How many Redland 49 tiles per m²?
17.7 tiles per m² at a 282 mm gauge (below 30°) (BMI Group, Redland 49 tile product page, pitched roof characteristics, read 2026-09-20). From 30° the data sheet allows a wider gauge of 307 mm, so the same m² takes 16.3 tiles and 3.26 m of batten (BMI Group, Redland 49 tile product page, pitched roof characteristics, read 2026-09-20). Tiles to order = m² of roof x tiles per m² x (1 + 10% waste), rounded up. Waste: Rule of thumb, not a tile manufacturer figure, read 2026-09-20; hips and valleys cut more.
Redland 49 gauge and battens
Maximum batten gauge 282 mm below 30° and 307 mm from 30° (BMI Group, Redland 49 tile product page, read 2026-09-20). One batten per gauge up the slope gives 1000 / 282 = 3.55 m of batten per m² (3.26 m at 307 mm). BMI gives the nail size (50 x 3.35 mm aluminium alloy) and the batten size (38 x 25 mm up to 450 mm rafter centres, 50 x 25 mm up to 600 mm); the fixing schedule comes from the fixing specification for your site.
Redland 49 tiles and battens for 10 to 150 m²
Computed with the tile calculator's own code at 17.7 per m² and the 282 mm gauge. The m² is the roof surface; the roof area in m² guide turns a plan size and pitch into it.
| Roof area | Tiles, no waste | Tiles, 10% waste | Battens (m) | Tiles at 16.3/m² |
|---|---|---|---|---|
| 10 m² | 177 | 195 | 40 | 180 |
| 25 m² | 443 | 487 | 98 | 449 |
| 50 m² | 885 | 974 | 196 | 897 |
| 75 m² | 1,328 | 1,461 | 293 | 1,345 |
| 100 m² | 1,770 | 1,947 | 391 | 1,793 |
| 150 m² | 2,655 | 2,921 | 586 | 2,690 |
A 12 x 9 m roof in Redland 49 at 25° to 45°
The same plan gets more roof surface as the pitch rises, so more tiles at the same coverage. From 30° the rows use the second data sheet line (16.3 per m² at 307 mm). Check the minimum pitch on the data sheet before you choose the tile for a shallow roof.
| Pitch | Roof area (m²) | Tiles per m² | Tiles | Battens (m) | Ridge tiles |
|---|---|---|---|---|---|
| 25° | 119.2 | 17.7 at 282 mm | 2,321 | 465 | 27 |
| 30° | 124.7 | 16.3 at 307 mm | 2,237 | 447 | 27 |
| 35° | 131.8 | 16.3 at 307 mm | 2,364 | 473 | 27 |
| 40° | 141 | 16.3 at 307 mm | 2,528 | 506 | 27 |
| 45° | 152.7 | 16.3 at 307 mm | 2,739 | 548 | 27 |
Work it out for your roof
Open the roof tile calculator, pick Redland 49 (BMI, concrete interlocking) under Tile type and type each roof section: the tiles per m² and the gauge load from the data sheet and stay editable. It adds the ridge and hip tiles and, with your price per tile, the tile cost; the installed range for concrete tiles is £80 to £150 per m² (MyJobQuote, "Roof Tile Cost Guide", last updated 30 July 2026, cost per m² supplied and fitted, read 2026-09-20). The UK tiling cost guide compares it with 6 other tiles, from Marley Modern (concrete interlocking) to Natural slate 500 x 250 mm (100 mm headlap).
Sources
- Redland 49: tiles per m²: BMI Group, Redland 49 tile product page, pitched roof characteristics: "Tiles per m2: 17.7" (at the 282 mm gauge used below 30°; at 30° and over the maximum gauge is 307 mm, 3.26 m/m² of batten, 16.3 tiles/m²) — https://www.bmigroup.com/uk/p/redland-49-tile-brown-granular-1879346601/, read on 2026-09-20
- Redland 49: batten gauge: BMI Group, Redland 49 tile product page: "Max batten gauge: below 30° at 282mm / 30° and over 307mm", "Min batten gauge: 257mm" — https://www.bmigroup.com/uk/p/redland-49-tile-brown-granular-1879346601/, read on 2026-09-20
- Redland 49: second coverage figure: BMI Group, Redland 49 tile product page, pitched roof characteristics: at 30° and over the maximum gauge is 307 mm, 3.26 m/m² of batten and 16.3 tiles/m² (17.7 at the 282 mm gauge below 30°) — https://www.bmigroup.com/uk/p/redland-49-tile-brown-granular-1879346601/, read on 2026-09-20
- Redland 49: second batten gauge: BMI Group, Redland 49 tile product page: "Max batten gauge: below 30° at 282mm / 30° and over 307mm" — https://www.bmigroup.com/uk/p/redland-49-tile-brown-granular-1879346601/, read on 2026-09-20
- Redland 49: price per tile: No merchant price read for Redland 49 on 2026-09-20: type the price per tile from your own quote (typical ranges by material under the field, from MyJobQuote 2026) — https://www.myjobquote.co.uk/costs/replacing-roof-tiles, read on 2026-09-20
- Ridge tile length: Marley, Ridge and Hip Tiles: ridge tiles are "provided in lengths of 450mm for clay and 457mm for concrete" — https://www.marley.co.uk/fittings/ridge-and-hip-tiles, read on 2026-09-20
- Waste on tiles: Rule of thumb, not a tile manufacturer figure: IKO's shingle recommendation "adding 10 to 15 percent of this area for material waste or loss depending on the style of roof"; cuts at hips and valleys push it up — https://www.iko.com/na/blog/blueprint-for-roofing/, read on 2026-09-20
- Installed cost per m², Concrete Tiles: MyJobQuote, "Roof Tile Cost Guide", last updated 30 July 2026, cost per m² supplied and fitted: "Concrete Tiles: £80–£150" — https://www.myjobquote.co.uk/costs/replacing-roof-tiles, read on 2026-09-20
Frequently asked questions
- How many Redland 49 tiles per m²?
- 17.7 at a 282 mm gauge (below 30°), from the manufacturer data sheet (BMI Group, Redland 49 tile product page, pitched roof characteristics, read 2026-09-20). 16.3 at 307 mm from 30°. Add 10% for cuts and breakages and round up.
- What is the Redland 49 batten gauge?
- 282 mm maximum below 30°, 307 mm from 30° (BMI Group, Redland 49 tile product page, read 2026-09-20). The gauge is the distance between battens; setting it out evenly between the eaves and the top course can make it a little less than the maximum, never more.
- How many Redland 49 tiles for 100 m² of roof?
- 1,770 tiles on the roof, 1,947 to order with 10% waste, and 391 m of batten. At 16.3 per m² (at 307 mm from 30°) it is 1,793 tiles to order. 100 m² is the roof surface, the plan area times the pitch multiplier, not the floor of the house.
- How much batten per m² for Redland 49?
- 1000 / 282 = 3.55 m of batten per m² of roof, and 1000 / 307 = 3.26 m at the wider gauge. BMI gives the nail size (50 x 3.35 mm aluminium alloy) and the batten size (38 x 25 mm up to 450 mm rafter centres, 50 x 25 mm up to 600 mm); the fixing schedule comes from the fixing specification for your site.
- How much does a Redland 49 tile cost?
- No merchant price was read for Redland 49, so the calculator leaves the price field for you to fill. Typical UK prices: clay £0.80 to £2.50 per tile, concrete £1 to £3.50, slate £3 to £5 (MyJobQuote, "Roof Tile Cost Guide", last updated 30 July 2026, read 2026-09-20).
More guides
- How much does it cost to tile a roof in the UK? (per m² and per roof)
Supplied-and-fitted cost per m² for concrete, clay and slate (MyJobQuote 2026) for 50 to 150 m² of roof; tiles, battens and tile cost per type at 10% waste.
- How to calculate roof area in square metres (UK pitched and hip roofs)
Roof area = plan area x pitch factor: 1.221 at 35°, so 12 x 9 m is 131.8 m² of roof. Chart for 8 x 6 to 15 x 10 m at 25° to 45°, gable vs hip, tiles.
- Marley Modern tiles per m², gauge and battens (chart for 10 to 150 m²)
Marley Modern: 9.9 tiles per m² at a 345 mm gauge, 10.7 at 100 mm headlap; 2.9 m of batten per m²; tiles and battens for 10 to 150 m² of roof.
- How many shingles do I need for a shed? (8x8 to 12x16 chart)
Bundles, underlayment, ridge cap, nails and drip edge for 8x8 to 12x16 ft gable sheds at 4:12 and 6:12 (Owens Corning, IKO); a 10x10 shed takes 4 bundles.
Last updated 2026-09-29. Planning quantities from manufacturer coverage figures and published cost ranges, each with its source and date: measure the roof and follow the product data sheet. Not a structural assessment.