| Lap sidings
can be installed horizontally or vertically. For
horizonal applications, start with the bottom course
and work up with 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.
For vertical applications, siding
should be nailed to horizontal blocking lines
or furring strips (see Wall Construction).
Table 9. Channel Siding Dimensions
| Thickness (in.) |
Nominal Width (in.) |
Finished Width (in.) |
| 3/4 |
6, 8, 10 |
5-1/2, 7-3/8, 9-3/8 |
| 5/8 |
6, 8 |
5-1/2, 7-3/8 |
|
