Installation Guide
3 | Diamond Kote Building Products Application Guide           6.18
INSULATED SHEATHINGS 
Diamond Kote
®
 Building Products may be 
installed over low-compression rigid foam 
or exterior gypsum sheathings. 
The following precautions must be followed:
•  Nailable structural sheathing must be 
behind the insulated sheathing.
•  Make sure to brace the wall accordingly 
to the required international and other 
building codes. 
•  For rigid foam sheathing up to 1" thick, 
siding may be nailed directly to the foam 
sheathing unless a drainage plane is 
required by the local building code. Nail 
length must be increased to ensure a 
minimum 1-1/2" fastener penetration 
into the structural framing. 
Note:  Diamond Kote
®
 Building Products  
may also be installed in compliance with 
category 8140-Exterior wall siding and 
sheathing for Wildland Urban Interface 
applications atop LP
®
 FlameBlock
®
sheathing. Refer to FlameBlock
®
 installation 
instructions and product data sheets.
All  Diamond Kote
®
 Building  Products may 
be installed as exterior siding in Wildland 
Urban Interface applications. It can be 
installed over one layer 5/8" Type X gypsum 
sheathing applied behind the exterior 
covering or cladding on the exterior side of 
the framing. They may also be installed over 
the exterior portion of a 1-hour re-resistive 
exterior wall that has been assembly 
designed  for  exterior  re  exposure which 
also includes assemblies using the gypsum 
panel and sheathing products listed in the 
Gypsum Association Fire Resistance Design 
Manual.
•  For rigid foam sheathing that is greater 
than 1", a minimum 1-1/2" thick by 
3-1/2" wide vertical strapping or furring 
strip must be installed over the sheathing 
to provide a solid, level nailing base 
for the siding. The strapping must be 
securely fastened to structural framing 
spaced no greater than 16" o.c. with a 
minimum fastener penetration of 1-1/2".
•  Diamond Kote
®
 Building Products  will not 
assume any responsibility for conditions 
arising from the use of foam sheathing or 
damage.
MOISTURE
•  Moisture and vapor control are critical 
elements of proper housing design. 
•  Check local building codes for application 
procedures for handling moisture and 
moisture vapor in your area.
•  Do not apply engineered wood siding to 
a structure having excessive moisture 
conditions such as drying concrete or 
plaster or wet blown cellulose insulation.
•  If conditions exist, the building should be 
well ventilated to ensure the substrate is 
completely dry prior to siding.
•  Siding must not be applied to any green 
or crooked structural framing members.
•  Do not apply siding over rain-soaked or 
buckled sheathing materials.
•  We recommend protection for your  
home from rainfall with gutters and 
downspouts. Always be sure that your 
drainage system is free of debris and 
working properly.
WEATHER-RESISTANT BARRIER
•  It is required to have a water-resistant, 
properly breathable barrier behind the 
siding. 
•  When integrating ashing with a water-
resistive barrier (WRB), be sure to follow 
the WRB installation instructions.
•  Diamond Kote
®
 Building Products will 
not assume responsibility for water 
penetration.
•  Consult local building codes for more 
details.
TRIM & FASCIA     190, 440, 540 & 2000 SERIES
INSTALLATION
• Trim ends may lightly touch adjacent trim edges around windows and doors only. Re-prime and paint all cut ends.
• When installing trim around windows and over window anges, be sure to follow the window manufacturer’s installation
instructions.
• All openings must be properly sealed and ashed in a manner that prevents moisture intrusion or buildup. Flashing may be
sealed to the water-resistive barrier by using adhesive ashing or housewrap tape.  (See ALL diagrams)
• When trim is installed adjoining vinyl siding, install Z-ashing with a 4 inch upper leg between horizontal trim and J-channel.
(See diagram 8a)
• Horizontal trim or bands shall be ashed with a sloped metal Z-ashing to redirect water away from the wall assembly.
GENERAL REQUIREMENTS (CONTINUED)
7a
7b
Windows, Doors and Openings
7c
7d
7e
LP SmartSide Trim & Fascia 
7
Housewrap 
Flap 
Head 
Flashing 
Jamb 
Flashing 
Sill 
Flashing 
Window 
Flashing 
Housewrap 
Tape 










