Page 45 - roofing
P. 45
NATURAL SLATE PITCHED ROOF
NATURAL SLATE TERMINOLOGY
WEIGHT (Kg/m2)
Slate Size Lap Battening Slate Qty Holing Batten per 4/6 4/7 7/9
mm mm Gauge mm m2 Gauge mm m2 mm mm mm
39.61
600 x 300 90 255 13.1 245 3.92 40.95 54.60
500 x 250 38.85
450 x 250 90 205 19.5 195 4.90 30.71 38.70 57.79
400 x 250 37.54 52.15
400 x 220 90 180 22.2 170 5.55 36.48 57.88
400 x 200
350 x 250 90 155 25.8 145 6.45 32.51
300 x 200
90 155 29.1 145 6.45
90 155 32.3 145 6.45
90 130 30.8 120 7.70
90 105 47.6 95 9.60 63.97
Head
25-30mm Batten Gauge
Capillary Spread Head Lap
Eaves Tail
undercourse
8 - 15mm
Holing Gauge
= Gauge + Lap
+ 8 to 15mm
Angle of Creep Margin Side Lap
The diagram and the common terms used in slate roofing
will serve as a general guide to terminology. Further
information on this subject can be obtained by reference
to BS 6100 Building and Civil Engineering terms.
ROOFING – ISSUE 1 45
