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Channel Siding Installation Guide

Lap sidings can be installed horizontally or vertically. For horizonal 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).

installation of channel siding  image

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