Dreadnought Technical Data

Relevant Test Information

Current European Freeze Thaw Standards require plain clay tiles for use in the U.K. to withstand at least 100 freeze / thaw cycles under method D of European Standard EN 539-2:2006.   When the new universal European test method E is adopted in the U.K, a top level of only 150 cycles may be deemed acceptable.   U.K. manufacturers regard this as too low.    Dreadnought Tiles will withstand in excess of 400 cycles under this new test. View Dreadnought Test certificate.

We know from experience that Dreadnought Tiles last for in excess of 100 years.  In fact there are many cases where second hand Dreadnought Tiles sell for more than new tiles.

Poor performance in freeze/thaw test are an indication of the potential for the delamination of clay roof tiles over time, as moisture held within the pores of the tiles expands when frozen.

Click here to view Dreadnoughts most recent CERAM test certificate demonstrating performance to over 400 freeze/thaw cycles.

Specifications

	Tiles	Eaves	Gable
Size	265 x 165 mm	215 x165 mm	248 x 265 mm
Weight	1.19 kg	0.95 kg	1.8 kg
Pattern	Traditional Single Camber
Material	Etruria Marl	Etruria Marl	Etruria Marl

 

 

	Pitched Roofs	Vertical
Minimum Lap	65 mm	35 mm
Maximum Gauge	100 mm	115 mm
Approx Weight at Maximum Gauge	71 kg/m2	63 kg/m2
Nails	38 x 2.65 mm alloy	38 x 2.65 mm alloy
Battens	38 x 25 mm	38 x 25 mm
Minimum Pitch	35 degree

 

Quantity Guide

 

Tiles @ 100mm Gauge	60m2
115mm Gauge	53m2
Eaves/Tops	6/lineal metre
Gable (Tile and Half)	5/lineal metre of verge
Hips and Valleys	10/lineal metre of main rafter
Ridges	Supplied in 300 mm and 450 mm lengths

 

Relevant Manufacturing Standards ‘Clay Roof Tiles for Discontinuous Laying’

 

BS EN 1304	Product Definitions and Specifications
BS EN 1024	Determination of Geometric Characteristics
BS EN 539-1	Part 1.  Impermeability Test
BS EN 539-2	Part 2.  Test for Frost Resistance
B S EN 538	Flexural Strength Test

 

Relevant Fixing Standards

 

BS 5534 2003	Code of Practice for Slating and Tiling
BS 8000-6.1990	Workmanship on Building Sites
BS6399 [part 2] 1997	Loadings for Buildings.  Code of Practice for Windloads