Shiplap Siding vs. Lap Siding

When it comes to exterior cladding, siding plays a major role in defining a home’s architectural character and performance. Two of the most popular styles—shiplap siding and lap siding—offer distinct visual effects, installation methods, and maintenance needs. Whether you’re designing a modern residence, a coastal retreat, or a timeless craftsman, understanding the differences between these profiles can help you choose the best fit for your project.

Below, we’ll break down the key distinctions between shiplap and lap siding, along with insights into materials that balance long-term durability, beauty, and sustainability.

What Is Shiplap Siding?

Shiplap siding is characterized by long horizontal boards that overlap with a small, uniform gap or “reveal” between each plank. Originally used in barns and coastal cottages, shiplap has become a hallmark of both rustic and contemporary design for its clean lines and shadowed seams. The profile’s distinctive rabbeted edge allows each board to fit neatly over the next, creating a tight, weather-resistant seal that still offers subtle texture and dimension.

Shiplap siding can be installed horizontally for a classic look or vertically for a more modern twist. Its streamlined aesthetic makes it a popular choice for luxury siding applications, both indoors and out.

What Is Lap Siding?

Lap siding, sometimes referred to as clapboard or bevel siding, is one of the oldest and most widely used siding types. Boards are installed with the top edge of each piece overlapping the one below it, creating a traditional layered effect that efficiently sheds water.

Lap siding offers timeless curb appeal and versatility across architectural styles, from colonial to contemporary. Depending on the chosen width, bevel, and texture, it can deliver either a classic handcrafted look or a more modern, linear aesthetic.

Comparing Performance and Maintenance

While both styles deliver beauty and charm, their long-term performance depends largely on the material used. Traditional wood versions of shiplap and lap siding require regular staining, sealing, and repainting to resist moisture, insects, and UV damage. Without proper maintenance, boards can crack, warp, or rot over time, especially in regions with heavy rain or humidity.

Composite siding has emerged as a durable, low-maintenance alternative. Made from engineered materials that resist swelling and decay, composites retain their appearance with minimal upkeep. They also provide better dimensional stability than wood, reducing the likelihood of gaps or uneven spacing that can develop as boards expand and contract.

Sustainability and Material Innovation

Homeowners and designers are increasingly turning to sustainable siding options that reduce environmental impact without compromising design. Some composites contain recycled content or bio-based materials, providing a more eco-friendly path than wood harvested from forests.

Innovative manufacturers are now producing eco-friendly siding solutions that eliminate harmful chemicals and minimize waste during production. Choosing sustainable materials not only supports environmental responsibility but also reduces the need for frequent repairs and replacements, further lowering a project’s overall carbon footprint.

ACRE: A Versatile and Sustainable Solution

For those seeking the look of wood without the drawbacks, ACRE by Modern Mill is redefining what’s possible in exterior design. Made in the USA from upcycled rice hulls, ACRE is a sustainable, tree-free composite that mirrors the warmth and workability of real wood while offering exceptional durability and weather resistance.

ACRE is available in multiple profiles, including shiplap, nickel gap, v-groove, and edge and center bead, giving architects, builders, and homeowners the flexibility to achieve virtually any aesthetic. It’s resistant to moisture, pests, and rot, and contains no phenol, formaldehyde, adhesives, or forever chemicals—making it as safe for the planet as it is beautiful for the home.

Conclusion

Both shiplap siding and lap siding can elevate a home’s curb appeal and character, but the material behind the design is what truly determines its longevity and sustainability. While traditional wood requires ongoing upkeep, modern composites like ACRE by Modern Mill offer a smart alternative—capturing the timeless appeal of natural wood in a low-maintenance, eco-friendly form.

Ready to explore the future of siding? Order a sample of ACRE or get in touch with the Modern Mill team below to learn how it can bring lasting performance and beauty to your next project.