Elongated nailing slots in cedar siding play a critical role in ensuring a secure and aesthetically pleasing siding installation. In this article, we will delve into the technical details and practical applications of these slots, shedding light on their importance and proper usage.
Elongated Nailing Slots: An Overview
Elongated nailing slots, also known as keyhole or oval slots, are purposefully elongated openings designed into cedar siding. They are typically found at the top of each siding board, just beneath the overlap. These slots allow for both vertical and horizontal movement of the siding board when nailed, compensating for wood’s natural expansion and contraction due to varying environmental conditions.
Technical Benefits
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Preventing Cracks and Splits: The ability of cedar siding to expand and contract is essential, especially in regions with fluctuating temperatures and humidity levels. Elongated nailing slots help prevent the siding from developing unsightly cracks or splits by accommodating these movements.
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Reducing Water Intrusion: A well-maintained cedar siding installation relies on effective water shedding. Elongated slots minimize the risk of water infiltration by ensuring that siding boards remain secure and properly aligned over time.
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Minimizing Warping: Cedar siding can warp if not installed correctly. Elongated nailing slots allow for subtle adjustments that help maintain a straight and uniform appearance.
Installation Guidelines
Properly utilizing elongated nailing slots in cedar siding requires careful attention to detail. Here are the key steps to ensure a successful installation:
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Nail Placement: When using elongated slots, it’s crucial to position nails at the center of the slot’s elongation, allowing room for movement in both directions. This prevents the siding from binding against the nail.
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Spacing: Follow manufacturer recommendations for nail spacing, but a common guideline is to place nails approximately 1 inch from the bottom of the slot and 1 inch from the top edge of the siding board. Spacing between nails should be in accordance with local building codes and manufacturer specifications.
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Nail Length and Type: Use corrosion-resistant nails that are long enough to penetrate the underlying sheathing by at least 1 inch. This ensures a secure hold for the siding board. Stainless steel nails are an excellent choice for cedar siding due to their corrosion resistance.
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Expansion Gaps: Maintain a small gap between the ends of siding boards (usually around 1/16 to 1/8 of an inch). This accounts for potential expansion and prevents the boards from binding against each other.
Conclusion
Elongated nailing slots in cedar siding are a critical component in ensuring the longevity and integrity of your siding installation. By understanding their technical benefits and following the proper installation guidelines, you can make the most of this feature and enjoy a beautiful, resilient, and well-protected exterior for your home. Remember that adherence to manufacturer recommendations and local building codes is essential for a successful siding project.