Installation Instructions
2
•  Climb cut the surface of siding such that rotation of the blade 
cuts downward on the primed or prefinished siding surface.
•  Seal all exposed surfaces, including all drip edges or where 
water will hang.
•  Apply finish coat of paint as soon as possible, and within 
180 days of application.
•  Follow the coating manufacturer’s application and 
maintenance instructions.
•  For best results use a high-quality 100% acrylic exterior paint, 
specially formulated for use on wood and engineered wood 
substrates; oil paint is acceptable.
   - DO NOT USE: stain 
   - DO NOT USE: vinyl-based paint 
(like vinyl acetate or PVA)
SMOOTH FINISH Panel Siding:
•  Either flat, satin or semi-gloss coatings can be applied to 
smooth finish panel siding. 
   - 
Each offers different appearance & maintenance benefits.  
   - See Technical Bulletin #049 for additional information.
CEDAR TEXTURE Panel Siding:
•  For best results use semi-gloss finish.
 -  
See Technical Bulletin #049 for additional information.
F I
LP Siding
Min. 1" (25 mm) 
clearance between 
siding and roofi  n g ,  
or trim and roofi ng
•  Trim should be thick enough so the siding does not extend 
beyond the face of the trim.
•   Trim and fascia must be applied in a manner that will not allow 
moisture intrusion or water buildup.
•  LP® SmartSide® siding is not designed and/or manufactured to 
be used as trim. 
T
Do not  run trim  or siding 
inside the kick- out fl ashing
•  
I
nstall kick-out fl ashing at roof eave-to-wall intersections to   
  direct the water into the gutter.
•  Install step fl ashing at roof-to-wall intersections with a      
 minimum 4 inch (102 mm) upper leg.
• Properly integrate fl ashing with the water-resistive barrier. Use 
housewrap, fl ashing tape, Z-fl ashing, or other items as needed 
to maintain the counterfl ashing principle.
•  
DO NOT extend the siding or trim into kick-out fl ashing or gutter.
•  Maintain a minimum 1 inch (25 mm) clearance between the end    
 of the gutter and the adjoining wall to allow for proper 
  maintenance of the siding.
K-O F
•   All openings must be properly sealed or fl ashed in a manner 
that prevents moisture intrusion or buildup. Several examples 
that accomplish this objective are shown on the following pages.
F, W, D  O
G  S
•   Seal all gaps with a high-quality, non-hardening, paintable 
exterior sealant meeting ASTM C920, minimum Class 25. 
Follow the sealant manufacturer’s instructions for application.
•   A properly installed WRB is required behind siding. Consult 
your local building code for details. 
•   The LP SmartSide panel siding limited warranty does not 
expressly or implicitly cover water penetration. 
 - LP does not assume responsibility for any water penetration.
•   Sheds and other accessory structures where the interior 
wall cavities will remain permanently exposed may use LP 
SmartSide panel siding with SilverTech or SmartFinish and 
do not require a WRB, if exempt by local building code.
W-R B (WRB) 
P P S
•  Handle prefinished panel siding with extreme care during 
storage and application. 
 - Do not remove slipsheet while handling or carrying siding      
   on job site as doing so may damage the coating.
 - Touch-up any damage to prefinished siding that may 
   occur during application per the instruction below or the  
 Prefinishers specifications.
 - Touch-up paint should be used sparingly. 
 - Carefully apply touch-up paint only to the areas with   
   missing paint. Doing so will allow the touched-up areas  
   to better blend in with the factory applied coating.
     - Apply touch-up paint to cover scratches less than 1 inch 
   in length and less than 1/16 inch wide, exposed nail heads 
 or small nicks.
 - 
Do not apply touch-up paint to spots greater than 3/4 inch 
 in diameter. 
 - Apply touch-up paint only when air, siding and paint 
 temperature are above 50°F and will remain above 50°F  
    for at least 24 hours after application.
 - Shake touch-up paint for 90 seconds before every use.
 - Do not use touch-up if you suspect the paint has frozen.
 - Do not apply touch-up paint to wet siding.
- Avoid using touch-up when condensation is likely to form.
 - Avoid using touch-up when precipitation is possible.
- Store touch-up paint between 40°F and 100°F.
•  Touch-up paint is air dried, while factory applied paint is 
generally cured using ovens. For this reason, the touch-up 
paint will have some minor differences initially and after time. 
Minimizing the use of touch-up paint is the best approach to 
ensure these minor differences are less noticeable.
•   Use the appropriate applicator provided in the LP® SmartSide® 
   ExpertFinish® Touch-Up Kit.
 - Nail Head Paint Applicator. 
(Figure 5H) 
 - Cut End Paint Applicator. (Figure 5J) 






