Cedar Ship Lap Siding: Beauty, Durability, and Practical Guide

Cedar ship lap siding blends classic Americana charm with modern durability, making it a popular choice for timeless exterior and interior applications. This article explores what cedar ship lap is, why it’s favored for homes, how to select the right grade and profile, installation tips, maintenance best practices, costs, and environmental considerations. Readers will gain practical insights to make informed decisions about using cedar ship lap siding on residential projects.

What Is Cedar Ship Lap Siding

Cedar ship lap siding refers to narrow, horizontal boards with a rabbeted edge that allows boards to overlap neatly at joints, creating a smooth, continuous exterior or interior surface. Made from western red cedar or other cedar species, ship lap panels highlight natural grain patterns and warm tones. The rabbeted profile helps shed water and minimizes gaps, contributing to a clean, classic appearance. Cedar ship lap is available in various thicknesses, typically ranging from 3/8 inch to 5/8 inch, and can be ordered as solid wood or pre-primed options for interior walls.

Why Homeowners Choose Cedar Ship Lap

The appeal of cedar ship lap lies in several key advantages. First, cedar’s natural oils confer weather resistance and decay resistance, helping it hold up in diverse climates. Second, the tight grain and scent of cedar add aesthetic value, with hues that range from pale amber to reddish-brown as it ages. Third, the ship lap profile provides a classic, streamlined look that complements traditional and contemporary architecture. Finally, cedar can be refinished or repainted, extending the life of the siding without compromising its character.

Boards, Grades, And Profiles

Choosing the right cedar ship lap involves understanding boards, grades, and profiles. Cedar boards come in clear, premier, select, and common grades, each reflecting the amount of knots and straightness. For exterior applications, many homeowners opt for heartwood or clear grades for fewer defects and a more uniform appearance. Profiles vary in rabbet depth and thickness; common exterior options are 3/8 inch or 1/2 inch thick with a standard 5.5 inch or wider exposure. For interiors, you may find pre-primed options and tongue-and-groove alternatives that simplify installation.

Installation Considerations

Proper installation is essential to maximize performance and lifespan. Key steps include:

• Preparation: Acclimate cedar boards to site conditions for 48 to 72 hours and check for warping.
• Framing: Ensure a solid, straight substrate with a moisture barrier and proper drainage behind the siding.
• Fastening: Use corrosion-resistant fasteners, typically stainless steel or coated nails, and maintain recommended nail spacing to avoid boards cupping.
• Expansion Gaps: Account for wood expansion and contraction with appropriate gaps at corners, ends, and door and window openings.
• Sealing Joints: Apply flashing and sealant at seams and edge joints to prevent moisture intrusion.

For interior applications, ship lap can be installed over studs with insulation behind, using appropriate siding adhesives or fasteners if necessary. Some installers prefer pre-primed cedar ship lap for interiors to simplify paint work and reduce finish time.

Finishes And Maintenance

Maintenance keeps cedar ship lap looking its best and lasting longer. Exterior cedar should be finished with a high-quality penetrating stain or clear sealant designed for exterior woods. Regular maintenance includes:

• Annual Inspections: Look for loose boards, cracking, or signs of water damage.
• Cleaning: Rinse with a soft brush and mild detergent to remove mildew and dirt; avoid high-pressure washing that can erode wood fibers.
• Refinishing: Re-coat every 3–7 years depending on climate, sun exposure, and finish type.
• Repair: Promptly replace or repair damaged boards to maintain moisture barriers.

Interior cedar ship lap requires less weather protection but benefits from a good interior finish and occasional cleaning to maintain aesthetics. For high-humidity spaces, ensure adequate ventilation to prevent moisture buildup behind the siding.

Weather Resistance And Longevity

Cedar’s natural oils help resist decay and insects, contributing to long-term durability. The ship lap profile adds a slight protective barrier against water infiltration by overlapping joints. In regions with heavy rainfall, diligent sealing and regular maintenance are essential. Areas with freeze-thaw cycles may experience more expansion and contraction, underscoring the need for proper gaps and fastener choices. When properly installed and maintained, cedar ship lap siding can last decades, often outperforming some composite alternatives in appearance and value retention.

Cost And Value

Costs for cedar ship lap siding vary based on grade, thickness, profile, and whether boards are pre-primed. Typical exterior cedar ship lap materials range from 8 to 14 dollars per square foot for material alone, with installation adding 4 to 10 dollars per square foot depending on complexity and local labor rates. Interior applications can be more cost-efficient if pre-finished panels are used. While cedar may carry a higher upfront price than some vinyl siding, its natural beauty, resale value, and longevity often justify the investment for many homeowners. A professional assessment helps tailor budget and timeline to local climate and structure.

Environmental Considerations

Responsible sourcing matters. Look for cedar that is certified by credible forestry programs, such as the Forest Stewardship Council (FSC) or Sustainable Forestry Initiative (SFI). Locally harvested cedar reduces transportation emissions and supports regional economies. Consider finishing products with low-VOC finishes to minimize indoor air pollutants. Proper disposal of waste wood and offcuts should align with local guidelines to minimize environmental impact.

Tips For Choosing A Cedar Ship Lap Siding Contractor

Choosing the right contractor ensures a durable, aesthetically pleasing result. Consider these criteria:

• : Look for a portfolio featuring cedar ship lap projects similar in scope to yours.
• : Request contact information for recent clients and inquire about satisfaction and outcomes.
• : Confirm the supplier and grade of cedar being used, and whether finishes are included.
• : Ask about workmanship warranties and finish warranties for coatings.
• : Ensure the contractor conducts moisture tests and substrate assessments before installation.

Standard timelines, permits, and local building codes should be reviewed during the planning phase to prevent surprises and ensure a compliant installation.