Installation Guide

47
OUTSIDE CORNERS
TIP: When pre-assembling
exterior corners using
HardieTrim 5/4, 4/4 boards,
position the finish nailer
parallel with the trim
Single board
INSIDE CORNERS
Inside corners can be made with either
a single HardieTrim 5/4, 4/4 board in the
corner, or with one board on each wall
depending on the desired look.
Keep weather cuts at least 12 in.
apart on adjacent corner boards.
Keep nails at
least 1 in. from
ends and
3
/4 in.
from edges.
Angle slopes down
and to the outside.
Join lengths of boards
with angled cuts at
least 22.5˚
Two nails in each face attach
the corner to the building.
Water-resistive
barrier
16-in.
(max.)
Keep nails
at least 1 in.
from ends
and
3
/4 in.
from edges.
Pre-built corner
installation 4-in boards
Weather cuts
A pair of nails (one in each face)
attach the corner to the building.
Pre-built corner
installation 6-in boards
16-in.
(max.)
Corners made from HardieTrim
®
5/4, 4/4
boards can be pre-assembled before
they’re installed. Pre-assembled corners
look better and generally make the instal-
lation go more quickly. To join two pieces
of HardieTrim 5/4, 4/4 boards for a corner,
drive 2-in. 16 ga. corrosion-resistant finish
nails
1
/2 in. from the edge and spaced 16-
in. apart along the edge.
To fasten 4-in. corners to the wall, drive
a pair of finish nails or siding nails, (one nail
into each face of the corner) with the nails
spaced 16 in. apart. For 6-in. corners, drive
a pair of finish nails or siding nails into each
face spaced 16 in. apart. Nails should be
kept
3
/4 in. from the edges of the board and
1-in. from the ends.
When walls are more than 10 ft. high,
splice corner boards together using weath-
er cuts of at least a 22.5° angle. The angle
of the weather cut must slope downward
and away from the building. Then nail both
boards to the building with the same at-
tachment schedule as for pre-assembled
corners, except that 4-in. HardieTrim 5/4,
4/4 boards that should get two nails per
side every 16 in. Only install trim by butting
to it with the siding. Do not install any trim
product over James Hardie
®
siding.
NOTE: All weather cut
joints should be touched
up prior to installation.
8.14 8.15
8.16
8.17
WARNING
Use only 2-in. 16-ga. finish nails to
pre-assemble HardieTrim 5/4, 4/4 board corners.
!
General
Product
Information
Working
Safely
Tools for
Cutting and
Fastening
General
Installation
Requirements
General
Fastener
Requirements
Finishing and
Maintenance
HardieTrim
®
Boards/Battens
HardieWrap®
Weather Barrier
HardieSoffit
®
Panels
HardiePlank
®
Lap Siding
HardieShingle
®
Siding
HardiePanel
®
Vertical Siding
Appendix/
Glossary
ESR-1844 &
2290 Report