Alderman Roofing Lead Guide
 
British Standard BS1178 (1982) Milled Lead Sheet
  
CODE
3
4
5
6
7
8
THICKNESS (mm)
1.32
1.80
2.24
2.65
3.15
3.55
COLOUR CODE
GREEN
BLUE
RED
BLACK
WHITE
ORANGE
WEIGHT (Kg/m2)
15.0
20.4
25.4
30.1
35.7
40.3
How to claculate the weight of a 750mm wide by 2.45mt piece of Code 5 lead:
0.75 X 2.45 = 1.84sq.m X 25.4kg/sq.m (for Code 5) = 46.7kg + 5% = 49kg maximum
               
Alderman Roofing Sizing guidelines for good practice
     
APPLICATIONS
Code
L
mm
W
mm
Soakers
Flashings
Pitched Gutters
Cladding
Weatherings
Parapet Gutters
Roofing
3
1000
-
YES
NO
NO
NO
NO
NO
NO
4
1500
500
YES
YES
YES
YES
YES
NO
NO
5
1500
600
NO
YES
YES
YES
YES
YES
YES
6
2250
675
NO
NO
NO
NO
YES
YES
YES
7
2500
675
NO
NO
NO
NO
NO
YES
YES
8
3000
700
NO
NO
NO
NO
NO
YES
YES
 
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