Installation Guide
9 | Diamond Kote Building Products Application Guide           6.18
RIGIDMOUNT™ 
Ensure the penetration is sealed and/or 
ashed  properly  by  integrating  it  into  the 
weather-resistive barrier. RigidMount
™
 trim 
should extend beyond the face of the siding. 
Watch our RigidMount
™
 Installation Video.
APPLICATION 
•  Start by preparing for the application 
needed. Some cutting maybe necessary 
for tment of your specic situation. 
•  Cuts should always be re-sealed with 
touch up paint. 
•  A jigsaw works best for cutting, be sure 
to cut from the back to keep the nished 
surface intact. 
•  Set the mount into position and mark the 
weather resistive barrier by using the 
nail holes (about 1/2" above the built in 
ashing)  and  the  outside  edges  of  the 
ange. 
•  Remove the mount and slit the weather 
resistive barrier horizontally (slightly 
wider  than  the  top  ange  across  those 
marks) creating a ap in the weather 
resistive barrier.
•  Next install the RigidMount
™
 by slipping 
the  top  of  the  nailing  ange  under  the 
weather resistive barrier ap.
•  Set the mount at the correct elevation, 
level and then fasten the RigidMount
™
 to 
the wall lling every hole in nail ange.
•  Hand driven galvanized roong nails are 
recommended for fastening, such as 
1-3/4" Maze STORMGUARD
®
.
•  Place the adhesive ashing tape over the 
top of the RigidMount
™
  ange  making 
sure to cover nailing holes. 
•  Fold the ap down and seal the slit in the 
weather resistive barrier with compatible 
building tape.
•  This single fashion installation helps 
shed bulk water out and away from the 
structure.
•  Install siding around the mount and 
leave the proper spacing between the  
RigidMount  placement  ange  and  the 
siding. 
(Min. 3/16")
•  Note that the top course of siding should 
be cut 3/8" above the built in ashing as 
measured from the face of the siding. 
•  Make sure to seal cut edges of siding 
with provided touch-up paint. This area 
should be left uncaulked. 
•  Finish by applying sealant, starting 
approximately 3/4" in from the top 
corner and then working your way out, 
down the side, and across the bottom.
•  Also seal the space between the wall 
penetrating material and the RigidMount
™ 
cut out. 
•  DAP
®
 Spec Line 920  sealant which 
meets ASTM-C92
0  Specication  is 
recommended.
TRIM & FASCIA     190, 440, 540 & 2000 SERIES
INSTALLATION
• If framing around an existing column, be sure to use pressure
treated lumber in all locations that may be touching concrete,
masonry or decking. Provide adequate framing support for the
trim to be properly fastened. (See diagram 11a)
• Be sure to use proper ashing with a minimum 4 inch upper leg.
A secondary water-resistive barrier is recommended as well.
• Maintain a 3/8 inch space, and do not caulk, between trim and
ashing. (See diagram 11b)
• Maintain a minimum 1 inch clearance between LP SmartSide
products and any surface where water might collect.
(See diagram 11b)
• Fasten all trim over 11 inches wide a maximum of every 6
inches o.c. around the perimeter and every 12 inches o.c.
along intermediate supports. For trim under 11 inches wide,
fastener placement and quantity must be consistent with LP®
SmartSide® Trim and Fascia Application Instructions.
(See diagram 11b)
• Be sure to prime and paint all expose substrate surfaces and cuts.
• TRIM MUST NOT BE IN DIRECT CONTACT WITH MASONRY,
CONCRETE, BRICK, STONE, STUCCO OR MORTAR.
GENERAL REQUIREMENTS (CONTINUED)
• Trim mounting blocks should extend beyond the face of the siding.
• Prime and paint all cut ends, edges and holes.
On-site assembled:
• Use metal Z-ashing with a minimum 4 inch upper leg over the top side of trim mounting block. Leave a minimum 3/8 inch
space above Z-ashing and do not caulk. (See diagram 11d)
• Properly integrate the Z-ashing with the housewrap. (See diagram 11c)
• Apply fasteners meeting the specications in this document.
Pre-assembled:
• Properly integrate the built-in placement ange and ashing with the housewrap.  (See diagram 11c)
• Fasten the built-in-placement ange to the framing meeting the pre-assembled trim mounting block manufacturer’s
instructions.
• When installing pre-assembled trim mounting blocks, leave proper spacing at the two sides and bottom between the
built-in-placement ange and the siding (minimum 3/16 inch). Seal these spaces with sealant. (See diagram 11d)
• Seal the space between the wall-penetrating material or xture and the mounting block cut-out. (See diagram 11d)
11a
C
UTTING
11b
11c 11d
6” o.c.
Column Application
Mounting Blocks for Exterior Fixtures
LP SmartSide Trim & Fascia 
11
TRIM & FASCIA     190, 440, 540 & 2000 SERIES
INSTALLATION
• If framing around an existing column, be sure to use pressure
treated lumber in all locations that may be touching concrete,
masonry or decking. Provide adequate framing support for the
trim to be properly fastened. (See diagram 11a)
• Be sure to use proper ashing with a minimum 4 inch upper leg.
A secondary water-resistive barrier is recommended as well.
• Maintain a 3/8 inch space, and do not caulk, between trim and
ashing. (See diagram 11b)
• Maintain a minimum 1 inch clearance between LP SmartSide
products and any surface where water might collect.
(See diagram 11b)
• Fasten all trim over 11 inches wide a maximum of every 6
inches o.c. around the perimeter and every 12 inches o.c.
along intermediate supports. For trim under 11 inches wide,
fastener placement and quantity must be consistent with LP®
SmartSide® Trim and Fascia Application Instructions.
(See diagram 11b)
• Be sure to prime and paint all expose substrate surfaces and cuts.
• TRIM MUST NOT BE IN DIRECT CONTACT WITH MASONRY,
CONCRETE, BRICK, STONE, STUCCO OR MORTAR.
GENERAL REQUIREMENTS (CONTINUED)
• Trim mounting blocks should extend beyond the face of the siding.
• Prime and paint all cut ends, edges and holes.
On-site assembled:
• Use metal Z-ashing with a minimum 4 inch upper leg over the top side of trim mounting block. Leave a minimum 3/8 inch
space above Z-ashing and do not caulk. (See diagram 11d)
• Properly integrate the Z-ashing with the housewrap. (See diagram 11c)
• Apply fasteners meeting the specications in this document.
Pre-assembled:
• Properly integrate the built-in placement ange and ashing with the housewrap.  (See diagram 11c)
• Fasten the built-in-placement ange to the framing meeting the pre-assembled trim mounting block manufacturer’s
instructions.
• When installing pre-assembled trim mounting blocks, leave proper spacing at the two sides and bottom between the
built-in-placement ange and the siding (minimum 3/16 inch). Seal these spaces with sealant. (See diagram 11d)
• Seal the space between the wall-penetrating material or xture and the mounting block cut-out. (See diagram 11d)
11a
C
UTTING
11b
11c 11d
6” o.c.
Column Application
Mounting Blocks for Exterior Fixtures
LP SmartSide Trim & Fascia 
11
Housewrap 
Flap
Adhesive 
Flashing
Housewrap 
Tape
Min. 3/16" 
space with 
sealant
Min. 3/8" space 
(do not caulk)
Min. 3/16" 
space with 
sealant










