Installation Guide

5. INSTALLING TONGUE AND GROOVE
Tongue and groove siding can be installed horizontally or vertically. In horizontal application, start at the bottom
and work up with the groove edges facing downwards. Siding up to 6 inches wide can be blind nailed with one
siding nail per bearing toe-nailed through the base of each tongue. Wider siding should be face nailed using two
nails per piece. Nails must penetrate 1¼” into solid wood.
In vertical application, start at one corner with grooved edge toward the adjacent wall. Use a level or plumb line
to ensure that the rst board is installed plumb. The grooved edge of the rst board may have to be trimmed to
ensure a ush t. Siding is nailed to horizontal blocking lines installed between studs or to furring strips. As with
horizontal installation, pieces up to 6 inches can be blind nailed and wider pieces should be face nailed.
6. INSTALLING LAP SIDINGS
Lap sidings can be installed horizontally or vertically. For horizontal applications, start with the bottom course
and work up with the channels pointing upwards. Allow a ⅛” expansion gap between pieces if the siding is air or
kiln-dried. Do not nail through overlaps. For siding up to 6 inches wide, use one nail one inch up from the lap.
Face nail with two nails per piece for 8 inches patterns and wider, keeping nails 2 ½ to 3 inches apart to allow for
dimensional movement without splitting. For vertical applications, siding should be nailed to horizontal blocking
or furring strips.
INSTALLATION
WESTERN RED CEDAR
SIDING
12
Stud
House wrap
(eg. Tyvek®
DrainWrap™)
Exterior
sheathing
Cedar siding
up to 6” wide
Expansion gap
1/8” for dry
siding
(A) 6” and narrower lap siding
Stud
House wrap
(eg. Tyvek® DrainWrap™)
Exterior
sheathing
Cedar siding
Expansion gap
1/8” for dry
siding
(B) 8” and wider lap siding
Stud
House wrap
(eg. Tyvek®
DrainWrap™)
Exterior
sheathing
Cedar siding
up to 6” wide
(A) 6” and narrower siding in
normal climatic conditions
Stud
House wrap
(eg. Tyvek® DrainWrap™)
Exterior
sheathing
Cedar siding
up to 6” wide
Extra nail
(B) 6” and narrower siding in hot,
dry, windy or seacoast climates
Stud
House wrap
(eg. Tyvek® DrainWrap™)
Exterior
sheathing
Cedar siding
(C) 8” and wider siding
Ring shank nails
must penetrate
solid wood 1¼”
Ring shank nails
must penetrate
solid wood 1¼”
Ring shank nails
must penetrate
solid wood 1¼”
Ring shank nails
must penetrate
solid wood 1¼”
Ring shank nails
must penetrate
solid wood 1¼”