Installation Guide
34 | Diamond Kote Building Products Application Guide           6.18
LAP SIDING 
INSTALLED VERTICALLY continued
•  Lap Siding installed vertically must be 
applied in a manner that will not allow 
moisture intrusion or water buildup.
•  When using LP
® 
SmartSide
®
 siding with 
other  siding products like stucco, brick 
or cultured stone veneers, it is important 
to use a capillary break so moisture 
absorbed into those veneers cannot 
be transferred into SmartSide siding. 
Separate SmartSide siding from veneers 
with min. 3/8" space for horizontal joints 
and 3/8" for vertical joints, use sealant. 
Backer rod may be required by the 
sealant manufacturer. 
(Figure 7 & 8)
•  All other requirements of the LP
® 
Lap 
Siding Instructions and Trim and Fascia 
Instructions must be followed.
FASCIA APPLICATION
 Trim may be installed as fascia, without sub
fascia, if it is 440 Series or larger and the
following specications are met: 
•  Trim and Fascia must be greater than 
5 inches wide.  Maximum roof truss or 
rafter spacing of 24 inches on-center.
•  If trim is installed directly to outlookers 
on an overhanging rake, the outlookers 
must be installed edgewise and must 
be spaced no wider than 24 inches o.c. 
(Diagram 9d)
•  190 Series Trim and Fascia products 
MUST BE supported with solid wood 
sub-fascia.
•  Trim and Fascia are not designed for 
structural applications and cannot be 
used in the structural design of a roof 
assembly.
•  Exposed ying or suspended barge, rake 
or fascia tails are not covered under the 
LP
® 
 SmartSide
® 
 trim limited warranty if 
trim is extended beyond the protection 
of the roof system. 
•  If LP
® 
 SmartSide
®
 trim is extended 
beyond the protection of the roof 
system, cap the top of the trim with a 
metal coping that is integrated with the 
roong system. 
(Diagram 9a)
•  Install drip-edge to prevent water 
buildup behind fascia and trim. 
(Diagrams 
2c and 9b)
AT CORNERS: (See diagram 9c)
•  All joints must be supported by framing.
•  Do not nail from the face of one trim 
member into the edge of another.
•  Do not miter cut the corner joint.
TRIM & FASCIA     190, 440, 540 & 2000 SERIES
INSTALLATION
• Trim may be installed as fascia, without sub-fascia, if it is 440
Series or larger and the following specications are met:
- Trim and Fascia must be greater than 5 inches wide.
-Maximum roof truss or rafter spacing of 24 inches
on-center.
• If trim is installed directly to outlookers on an overhanging rake,
the outlookers must be installed edgewise and must be spaced
no wider than 24 inches o.c. (See diagram 9d)
• 190 Series trim and fascia products MUST BE supported with
solid wood sub-fascia.
• Trim and Fascia are not designed for structural applications and
cannot be used in the structural design of a roof assembly.
• Exposed ying or suspended barge, rake or fascia tails are not
covered under the LP SmartSide trim limited warranty if trim
is extended beyond the protection of the roof system. If LP
SmartSide trim is extended beyond the protection of the roof
system, cap the top of the trim with a metal coping that is
integrated with the roong system. (See diagram 9a)
• Install drip-edge to prevent water buildup behind fascia and
trim. (See diagrams 2c and 9b)
AT CORNERS:  (See diagram 9c)
• All joints must be supported by framing.
• Do not nail from the face of one trim member into the edge of
another.
• Do not miter cut the corner joint.
GENERAL REQUIREMENTS (CONTINUED)
9a
9b
Fascia and Rake Boards
9c
9c
LP SmartSide Trim & Fascia 
9
TRIM & FASCIA     190, 440, 540 & 2000 SERIES
PREPARATION
•  Minimum 6 inches clearance must be maintained between trim
and nished grade. (See diagram 2a)
•  Trim applied adjacent to roofs, porches, patios, sidewalks, etc.
must have a clearance of at least 1 inch above any surface where
water might collect. The surface must be sloped or otherwise
designed to provide proper drainage so the trim is at no time
directly exposed to standing water. (See diagram 2b)
•  A non-corrosive drip-edge must be applied at bottom edge of
roong where it meets the fascia. (See diagrams 2c and 9c)
•  In a horizontal brick frieze or band board application where the
trim meets the masonry leave a 3/8 inch minimum airspace and
ash between the trim and the masonry. (See diagram 2d)
GENERAL REQUIREMENTS (CONTINUED)
•  For the cleanest cut and longer blade life, a ne-tooth carbide
tipped blade is recommended.
•  Trim and fascia are manufactured with a special edge coating
which reduces moisture-related issues. Do not rip and/or rout
the trim and fascia, as it will leave the edges unprotected. If the
trim or fascia materials are ripped you must take special care to
prime, paint and seal all exposed wood ber as described in the
nishing section.
•  Climb cut the surface of the trim and fascia such that the rotation
of the blade cuts downward on the primed or prenished
surface.
•  Do not miter trim ends or edges. 45 degree diagonal cuts of trim
ends around door and window opening is acceptable, as well as
joining. (See diagram 2e)
2a
C
UTTING
2b
2c
2d
2e
General Information (continued)
Cutting
LP SmartSide Trim & Fascia 
2
Metal
Coping
1" Gutter Clearance
2x6 
Blocking
Rafter
 3/16" space with sealant
Trim Board
Trim Board
9d
TRIM & FASCIA     190, 440, 540 & 2000 SERIES
INSTALLATION
• Trim may be installed as fascia, without sub-fascia, if it is 440
Series or larger and the following specications are met:
- Trim and Fascia must be greater than 5 inches wide.
-Maximum roof truss or rafter spacing of 24 inches
on-center.
• If trim is installed directly to outlookers on an overhanging rake,
the outlookers must be installed edgewise and must be spaced
no wider than 24 inches o.c. (See diagram 9d)
• 190 Series trim and fascia products MUST BE supported with
solid wood sub-fascia.
• Trim and Fascia are not designed for structural applications and
cannot be used in the structural design of a roof assembly.
• Exposed ying or suspended barge, rake or fascia tails are not
covered under the LP SmartSide trim limited warranty if trim
is extended beyond the protection of the roof system. If LP
SmartSide trim is extended beyond the protection of the roof
system, cap the top of the trim with a metal coping that is
integrated with the roong system. (See diagram 9a)
• Install drip-edge to prevent water buildup behind fascia and
trim. (See diagrams 2c and 9b)
AT CORNERS:  (See diagram 9c)
• All joints must be supported by framing.
• Do not nail from the face of one trim member into the edge of
another.
• Do not miter cut the corner joint.
GENERAL REQUIREMENTS (CONTINUED)
9a
9b
Fascia and Rake Boards
9c
9c
LP SmartSide Trim & Fascia 
9
Ridge
1st Common 
Rafter
Barge 
Rafter
2x or 4x 
Outlookers
Fascia
End/
Verge 
Rafter
1st Common 
Rafter
Barge 
Rafter
A ladder of outlookers the same 
dimension as rafters at 24" o.c. max
9c
9b
9a
Drip-edge
Fascia
Sub-Fascia
CONTINUED ON NEXT PAGE 
WRB
Wall Sheathing
Lap Siding
Batten
Min. 3/8" space with 
sloped Metal Z-Flashing
Stucco, Brick or 
culutred stone
Horizontal 
Transition Joint
Vertical
Transiton Joint
Figure 7
Figure 8










