Installation Guide
22 | Diamond Kote Building Products Application Guide           6.18
OUTSIDE + INSIDE CORNER 
WITH NAIL FIN APPLICATION 
It is recommended to install corners 
with  nailing  n  over  nailable  structural 
sheathing. Some face nailing may be 
required if nailable sheathing is not 
present. 
•   Apply corners over properly prepared 
walls. 
(see general guidelines pg 2)
•   Diamond Kote
® 
Outside and Inside 
Corners with Nail Fin are designed to 
be installed blind nailed through the 
attached  nail  ns  to    help  complete  a 
hidden fastener install.
•   Install  corners  and  trims  rst  before 
beginning ins tallation of the siding 
products. Start by carefully removing 
the corners from protective shipping 
packaging.  Do not cut packaging on 
face of material.
•   Avoid drawing corners against uneven or 
out of square walls. Before installation 
make sure that the foundation or 
foundation coverings do not project 
beyond the plane of the wall.
•   Shim as necessary to avoid potential to 
split corners lengthwise.
FINGER JOINTS
•   10' Corners are manufactured with a 
random nger jointed  trim  board. For 
aesthetic purposes it is recommended 
to  attempt  to  turn,  ip,  and/or  cut  o 
corners in order to reduce the visibility 
of  the  nger  joints  around  high  trac 
areas of the building. 16' corners DO 
NOT contain nger joints. 
CUTTING 
•    Measure and mark corners for length 
typically 1/2" - 3/4" lower than the 
bottom course of siding.
•   Cut outside corners carefully to avoid 
marring the nished surface,  4" corners 
can be cut utilizing power compound 
miter saws. 6" corners typically require 
cutting by hand or by circular saw.
•   It is recommended to cover the bed of 
circular saws with tape or protective 
coverings to  avoid  marring  the  nished 
surfaces.
SEALING
•   Cotton swabs are recommended for 
touch-up  painting  on  the  nished  face 
of products. Paint and/or seal ALL cut 
ends and edges of corners. 
(see Figure 7a)
NOT RECOMMENDED to use pneumatic 
roong,  or siding  nail guns  to install 
trim with nailing n. 
•   When attaching siding, avoid nailing 
closer than 1-1/2" from the end of 
the board so the power nail does not 
penetrate the nail n of Diamond Kote
®
Trims. 
•  Use hand driven galvanized roong nails 
for installation on Corner.
•  1-3/4" StormGuard Ring shank nails 
from Maze Nails are recommended.
•  When installing inside and outside 
corners over 
(up to) 1" rigid foam 
sheathing, be careful not to drive nails 
so hard as to compress the foam and 
distort  the  n.  Nail  length  must  be 
increased to ensure penetration of the 
wood substrate.
Figure 7a
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