Slate Coverage | Battening Gauges | Holing Gauges

David Wallace International - Slate UK

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Coverage, Battening and Holing Gauges

Coverage

Size (Nominal)		Lap (mm)
mm	50	65	75	80	85	90	95	100	105	110	115	120	125	130
600 x 350	10.2	10.5	10.7	10.8	10.9	11.0	11.2	11.3	11.4	11.5	11.6	11.7	11.9	12.0
600 x 300	11.9	12.3	12.5	12.6	12.7	12.9	13.0	13.1	13.2	13.4	13.5	13.7	13.8	14.0
550 x 300	13.1	13.5	13.8	14.0	14.1	14.3	14.4	14.6	14.7	14.9	15.1	15.2	15.4	15.6
500 x 300	14.6	15.1	15.4	15.6	15.8	16.0	16.2	16.4	16.6	16.8	17.0	17.3	17.5	17.7
500 x 250	17.4	18.0	18.5	18.7	18.9	19.1	19.4	19.6	19.9	20.1	20.4	20.6	20.9	21.2
450 x 300	16.4	17.0	17.5	17.7	18.0	18.2	18.5	18.7	19.0	19.3	19.6	19.9	20.2	20.5
400 x 250	22.4	23.4	24.1	24.5	24.9	25.3	25.7	26.1	26.6	27.0	27.5	28.0	28.5	29.0
400 x 200	27.9	29.1	30.0	30.5	31.0	31.5	32.0	32.5	33.1	33.6	34.2	34.8	35.5	36.1
350 x 250	26.1	27.5	28.5	29.0	29.6	30.2	30.8	31.4	32.0	32.7	33.4
350 x 200	32.5	34.2	35.5	36.1	36.8	37.5	38.3	39.0	39.8	40.7	41.5
300 x 200	39.0	41.5	43.4	44.3	45.4	46.5	47.6	48.8

Battening and Holing Gauges

	Battening gauge mm	m batten per m²	Holing gauge mm	Battening gauge mm	m batten per m²	Holing gauge mm
Headlap Slate Length		50mm			65mm
600mm 550mm 500mm 450mm 400mm 350mm 300mm	275 250 225 200 175 150 125	3.64 4.00 4.44 5.00 5.71 6.67 8.00	340 315 290 265 240 215 190	268 243 218 193 168 143 118	3.74 4.12 4.60 5.19 5.97 7.02 8.51	348 323 298 273 248 223 198
Headlap Slate Length		75mm			80mm
600mm 550mm 500mm 450mm 400mm 350mm 300mm	263 238 213 188 163 138 113	3.81 4.21 4.71 5.33 6.15 7.27 8.89	353 328 303 278 253 228 203	260 235 210 185 160 135 110	3.85 4.26 4.76 5.41 6.25 7.41 9.09	355 330 305 280 255 230 205
Headlap Slate Length		85mm			90mm
600mm 550mm 500mm 450mm 400mm 350mm 300mm	258 233 208 183 158 133 108	3.88 4.30 4.82 5.48 6.35 7.55 9.30	358 333 308 283 258 233 208	255 230 205 180 155 130 105	3.92 4.35 4.88 5.56 6.45 7.69 9.52	360 335 310 285 260 235 210
Headlap Slate Length		95mm			100mm
600mm 550mm 500mm 450mm 400mm 350mm 300mm	253 228 203 178 153 128 103	3.96 4.40 4.94 5.63 6.56 7.84 9.76	363 338 313 288 263 238 213	250 225 200 175 150 125 100	4.00 4.44 5.00 5.71 6.67 8.00 10.00	365 340 315 290 265 240 215
Headlap Slate Length		105mm			110mm
600mm 550mm 500mm 450mm 400mm 350mm	248 223 198 173 148 123	4.04 4.49 5.06 5.80 6.78 8.16	368 343 318 293 268 243	245 220 195 170 145 120	4.08 4.55 5.13 5.88 6.90 8.33	370 345 320 295 270 245
Headlap Slate Length		115mm			120mm
600mm 550mm 500mm 450mm 400mm 350mm	243 218 193 168 143 118	4.12 4.60 5.19 5.97 7.02 8.51	373 348 323 298 273 248	240 215 190 165 140 -	4.17 4.65 5.26 6.06 7.14 -	375 350 325 300 275 -
Headlap Slate Length		125mm			130mm
600mm 550mm 500mm 450mm 400mm	238 213 188 163 138	4.21 4.71 5.33 6.15 7.27	378 353 328 303 278	235 210 185 160 135	4.26 4.76 5.41 6.25 7.41	380 355 330 305 280