Installation Instructions

38 AND 76 SERIES STRAND SUBSTRATE
SMOOTH FINISH OR CEDAR TEXTURE
PRIMED LAP SIDING
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At the time of manufacture, siding meets or exceeds the
performance standards set forth in ICC-ES AC321 and has
achieved code recognition under ESR-1301, CCMC 11826-L,
APA recognition under PR-N124, and HUD recognition under
HUD-MR-1318c. For copies of Product Approvals go online
at https://lpcorp.com/resources/product-literature/ or call
LP Customer Support at 888-820-0325.
Minimum 6 inch (152 mm) clearance must be maintained
between siding and finish grade (ground cover).
Siding applied adjacent to surfaces such as porches, patios,
balconies, walking surfaces or porch columns must have a
clearance of at least 1 inch (25 mm) above any horizontal
surface. Clearance may be reduced to 3/8 inch (10 mm) for:
- Porches, patios, balconies, or walking surfaces that
slope away from the structure and are covered by a roof,
not an eave or overhang; or
- Porch columns.
Minimum 1 inch (25 mm) clearance at intersection with roof line.
Apply siding in a manner that prevents moisture intrusion and
water buildup.
All wood substrate that is exposed to the weather must be
sealed in a manner that prevents moisture intrusion and water
build up.
- Seal ALL exposed cuts of siding and trim. Field spray
applied coatings on cuts are not recommended.
- Sealing can be accomplished by applying a coating or
sealant according to the manufacturer’s requirements.
- Butt joints that are covered with joint molding, sealant
or factory prefinished end, are considered sealed from the
weather.
See Alternate Fastening Options for fastening lap siding to SIP,
ICF and Steel Frame assemblies.
DO NOT USE STAPLES.
SIDING MUST NOT BE IN DIRECT CONTACT WITH MASONRY,
CONCRETE, BRICK, STONE, STUCCO OR MORTAR.
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Store o the ground well supported, on a flat surface, under a
roof or separate waterproof covering.
Keep siding clean and dry. Inspect prior to application.
G  S
Seal all gaps with a high-quality, non-hardening, paintable
sealant meeting ASTM C920, minimum Class 25.
Follow the sealant manufacturer’s instructions for application.
All openings must be properly sealed or flashed in a manner that
prevents moisture intrusion or buildup. Several examples that
accomplish this are shown on the following pages.
F, W, D  O
W-R B (WRB)
A properly installed water-resistant barrier is required behind
siding. Consult your local building code for details.
The LP SmartSide limited warranty does not expressly or
implicitly cover water penetration. LP does not assume
responsibility for any water penetration.
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Moisture control and moisture vapor control are critical
elements of proper housing design. Check your local building
codes for application procedures for handling moisture and
water vapor in your area.
When using wet blown cellulose insulation, the insulation
must not be in direct contact with the siding and it must be
allowed to dry a minimum of 24 hours or longer if specified by
the insulation manufacturer.
As with all wood products, do not apply engineered wood
siding to a structure having excessive moisture conditions such
as drying concrete, plaster or wet blown cellulose insulation. If
such conditions exist, the building should be well ventilated to
allow it to dry prior to the application of the siding.
Siding must not be applied to green or crooked structural
framing members. Do not apply siding over rain-soaked or
buckled sheathing materials.
Gutters are recommended for control of roof water run o.
S S
38 Series Strand Substrate lap may be installed on studs
spaced a maximum of 16 inches (406 mm) o.c.
See Alternate Fastening Options for fastening 38 Series Strand
Substrate 6 inch (152 mm) and 8 inch (203 mm) lap on studs
spaced a maximum of 24 inches (610 mm) o.c.
76 Series Strand Substrate lap may be installed on studs
spaced a maximum of 24 inches (610 mm) o.c.
For installations over masonry or concrete walls, the wall
shall be furred out and open at the top and bottom of the wall
to allow for convective ventilation between framing spaced
16 inches (406 mm) o.c. The framing shall be of adequate
thickness to accept 1-1/2 inches (38 mm) of nail penetration. A
properly installed breathable water-resistant barrier is required
between the siding and masonry or concrete walls.
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Application instructions

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