Example house

Optimised order

4.2 m boards

1 (4.2 m)

4.8 m boards

4 (19.2 m)

5.4 m boards

41 (221.4 m)

6.0 m boards

31 (186.0 m)

Total

77 boards · 430.8 m

Used full length

32 boards

Courses are laid out on whole boards wherever the studs allow, short make-up pieces come out of offcuts, then the order is packed for least lineal metres and fewest boards.

With spare

4.2 m boards

1

4.8 m boards

4

5.4 m boards

41

6.0 m boards

35

Total

454.8 m

5% spare added as 4 × 6.0 m — the longest board covers any length that splits.

Take-off

Clad area (net of openings)

53.68 m²

Lineal metres cut

427.01 m

Pieces

129

Offcut waste

0.9%

Facings

4.2 m lengths

1 (4.2 m)

4.8 m lengths

1 (4.8 m)

5.4 m lengths

3 (16.2 m)

Pieces

13 · 24.23 m

One per wall at external corners marked with facings, plus two jambs and a head per opening.

Scribers

6.0 m lengths

2 (12.0 m)

Pieces

7 · 11.39 m

One per internal corner, plus one against each jamb facing.

Head flashings

1990 mm

× 2

1390 mm

× 1

Total

5.37 m

Made to length, one per opening — width plus both facings plus the lap each side.