Panel siding manufactured by LP (Louisiana-Pacific Corporation) is designed for use in outdoor structures, specifically sheds, where interior wall cavities will remain exposed. These application instructions detail requirements for installation, clearance, and substrate preparation, as outlined in official LP documentation. The siding meets or exceeds 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. Copies of these product approvals are available online or through LP Customer Support.
Siding Types and Installation Orientation
LP SmartSide panel siding is available in both non-grooved square edge and shiplap edge varieties. Non-grooved square edge panel siding can be installed either vertically or horizontally. However, shiplap edge panel siding is limited to vertical applications. Proper installation orientation is crucial for maintaining the structural integrity and weather resistance of the siding.
Structural Framing and Fastener Requirements
The spacing of structural framing members dictates the required panel siding series. 38 and 76 Series panel siding may be installed directly to studs spaced a maximum of 16 inches (406 mm) on center. 190 Series panel siding is required when installing directly to studs spaced up to a maximum of 24 inches (610 mm) on center.
Fastening should be accomplished using nails. While alternate fasteners such as staples are permissible, their use is contingent upon approval by local building codes and requires design approval by a licensed design professional and the local building official. The design must ensure the size, embedment, placement, and number of alternate fasteners are appropriate for the application.
Clearance Requirements
Maintaining adequate clearance between the siding and surrounding surfaces is essential to prevent moisture intrusion and potential damage. A minimum clearance of 6 inches (152 mm) must be maintained between the siding and the finish grade (ground cover).
Specific clearance requirements apply at intersections with horizontal surfaces:
- A general minimum clearance of 1 inch (25 mm) is required above any horizontal surface.
- This clearance may be reduced to 3/8 inch (10 mm) for porches, patios, balconies, or walking surfaces that slope away from the structure, provide gaps for water flow, and are covered by a roof (not an eave or overhang).
- A 3/8 inch (10 mm) clearance is also permissible for porch columns with walking surfaces that slope away from the structure or provide gaps for water flow.
- A minimum 1 inch (25 mm) clearance is required at the intersection with the roof line.
Moisture Management and Substrate Preparation
Proper moisture management is critical for the longevity of LP SmartSide panel siding. The siding must be applied and maintained in a manner that prevents moisture intrusion and water buildup. All wood substrate exposed to the weather must be sealed to prevent moisture intrusion and water buildup.
Specifically, all exposed cuts of siding and trim must be sealed. Field spray applied coatings on cuts are not recommended. Sealing can be accomplished by applying a paint or sealant according to the manufacturer’s requirements.
Several conditions must be avoided during installation:
- Application to structures with excessive moisture conditions, such as drying concrete, plaster, or wet blown cellulose insulation.
- Application to green or crooked structural framing members.
- Application over rain-soaked or buckled sheathing materials.
The use of gutters is recommended for controlling roof water runoff.
Handling and Storage of Pre-Finished Siding
Pre-finished panel siding requires careful handling during storage and application. Siding should be kept clean and dry and inspected prior to application. It must be stored off the ground on a flat surface and under a roof or separate waterproof covering. Additional support may be required to achieve safe clearance from the ground. When the covering is removed, all unit banding must be cut.
Limitations and Warranty Considerations
LP does not recommend panel siding for use in Insulated Concrete Form (ICF) assemblies. If used in such assemblies, LP will not warrant against buckling and shrinkage.
The documentation emphasizes the importance of adhering to these guidelines to ensure the performance and durability of the installed siding. Failure to follow these instructions may void any applicable warranties.
Conclusion
LP SmartSide panel siding offers a durable and versatile solution for outdoor structures. Successful installation relies on careful attention to framing requirements, clearance specifications, moisture management practices, and proper handling of materials. Adherence to the guidelines outlined in the official LP documentation is crucial for maximizing the lifespan and performance of the siding and maintaining warranty coverage.