Lap sidings can be installed horizontally or vertically. For horizontal applications, start with the bottom course and work up with the bevel sides of the channels pointing upwards.
Allow a 1/8 in. expansion gap between pieces if the siding is air-or-kiln-dried.
Do not nail through overlaps. For siding up to 6 in. wide, use one nail one inch up from the lap. Face nail with two nails per bearing for 8 in. patterns and wider, keeping nails 2-1/2 to 3 in. apart to allow for dimensional movement without splitting (see Figure 6).
Table 9. Channel Siding Dimensions
|Thickness (in.)||Nominal Width (in.)||Finished Width (in.)|
|3/8||6, 8, 10||5-1/2, 7-3/8, 9-3/8|
|5/8||6, 8||5-1/2, 7-3/8|