Installation Instructions
TRIM & FASCIA           190, 440, 540 & 2000 SERIES
INSTALLATION
LP SmartSide Trim Adjoining Vinyl Siding:
• Install vinyl siding meeting standards of manufacturers 
installation instructions and/or the Vinyl Siding Institutes’s 
Manual. 
• Horizontally adjoined trim and vinyl J-channel or utility trim: 
Install sloped Z-ashing with a minimum 4 inch (102 mm) upper 
leg. (See diagram 8a)
• Vertically adjoined trim and vinyl J-channel, J-channel should t 
snug to trim.
• Do not caulk between trim and J-channel or utility trim.
• Install the trim according to the LP SmartSide Trim and Fascia 
application instructions.
GENERAL REQUIREMENTS (CONTINUED)
LP® SmartSide® Trim Adjoining Other Materials
Window
Sill Flashing
Sloped
Z-Flashing
(do not caulk)
Utility Trim
Trim
Framing
Vinyl Siding
WRB
Sheathing
Sloped 
Z-Flashing 
(do not caulk)
Stucco, Brick 
or Cultured 
Stone
Masonry Over Trim
Casing Bead
WRB
Backer Rod 
and Sealant 
8a
8b
LP SmartSide Trim Adjoining Stucco, Brick or Cultured Stone:
When using LP SmartSide trim with stucco, brick or cultured stone, 
it is important to use a capillary break so moisture absorbed into 
the stucco, brick or cultured stone cannot transfer into the trim. 
• Avoid Direct Contact between the trim and stucco, brick or 
cultured stone.
• Separate with a minimum 3/8-inch (10 mm) space and a high-
quality sealant (backer rod may be required as per the sealant 
manufacturers instructions). Additional space may be required 
by the manufacturer of the stucco, brick or cultured stone 
cladding. (See diagram 8b)
• Other types of impervious material such as aluminum ashing 
can be used to separate the trim from the stucco, brick or 
cultured stone but the dissimilar materials should be properly 
spaced to allow for dierent rates of thermal or moisture-related 
movement.
• Apply sloped Z-ashing over horizontal trim so water that may 
get behind adjoining cladding can be redirected to the outer 
surface of the wall.
• Install the trim according to the LP SmartSide Trim and Fascia 
application instructions.
• Install the stucco, brick or cultured stone cladding in a manner 
consistent with the manufacturers installation instructions.
Masonry Under Horizontal 
Trim, or Along Vertical Trim
Casing Bead
Stucco, Brick 
or Cultured 
Stone
LP SmartSide Trim & Fascia 
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