Installation Guide

21
outside and inside corner posts
accessories installation
8"-12"
1/4" space at top of w
all
1/4"
1"
1"
Fig.1
Fig. 2
Fig.3
Step 1
A water-resistant material should be
used to flash the inside and outside
wall corners a minimum of 10˝ on
each side before installation of the
corner posts. A housewrap would be
an adequate flashing (Fig. 1).
Step 2
Place the corner post in position,
allowing a 1/4˝ gap between the top of
the post and the eave or soffit
(Fig. 2).
NOTE: If vinyl or aluminum soffit will be
installed, either install prior to corner post
installation or allow for soffit and accessory
thickness when positioning the height of the
corner.
Position a nail at the top of the upper
slot on both sides of the corner post,
leaving a 1/32˝ gap between the nail
heads and the corner post nailing hem.
The corner post hangs from these nails.
The balance of the nailing should be in
the center of the slot, 8˝ to 12˝ apart,
again leaving 1/32˝ between the nail
head and the corner post. This allows
for the expansion and contraction to
occur at the bottom. The corner post
should extend 3/4˝ below the starter
strip. Make sure the posts are vertically
straight and square.
Do not nail corner post tight.
Step 3
If more than one length of corner post
is required, overlap the upper corner
post over the lower corner post.
Splicing Outside
Corner Post
Remove 1˝ from the nail hem and
receiving channel of the bottom end
of the top piece. Position uncut top
end of lower post under bottom edge
of upper post allowing a 1/4˝ gap at
the nail for expansion and contraction.
(Fig. 3).