What's the difference between board-on-board and solid board privacy fencing?

Board-on-board (also called shadowbox) fencing has alternating boards mounted on opposite sides of the horizontal rails with slight overlap, while solid board fencing places all boards on the same side with edges butting tightly together. Both provide privacy, but they differ significantly in appearance, wind resistance, cost, and how they look from your neighbour's side — all important considerations for Metro Vancouver homeowners.

Solid board fencing is the simpler and more traditional design. All fence boards are attached to the same side of the horizontal rails, with edges touching or overlapping slightly to create a continuous flat surface with no gaps. From the front (the "finished" side), it looks clean and uniform. From the back (the rail side), you see the exposed posts and horizontal stringers. This creates a clear "good side" and "bad side," which can be an issue with neighbours. The traditional etiquette — and some municipal bylaws — call for the finished side to face your neighbour's property, meaning you look at the rails and posts from your own yard. Solid board provides complete privacy with no light or visibility through the fence. It's also slightly cheaper to install because it uses fewer boards and less labour.

Board-on-board (shadowbox) fencing is a more refined design where boards alternate on each side of the rails with a slight overlap (typically 1-1.5 inches). When you look at the fence straight on from either side, you see a solid wall of overlapping boards — full visual privacy. When you look at an angle, you can see slight gaps between the boards where they overlap. This design has several important advantages for Metro Vancouver properties.

Wind resistance is the biggest practical advantage of board-on-board in Metro Vancouver. Solid fences act as wind sails — they catch the full force of incoming wind, transferring enormous stress to the posts and footings. During the outflow winds and winter storms that hit Metro Vancouver regularly, solid privacy fences are far more likely to lean, crack, or blow over than board-on-board fences. The gaps in a board-on-board design allow wind to pass through, reducing the wind load by 30-50% while still providing visual privacy. For properties in exposed locations — the North Shore, elevated lots, areas near open fields in Delta or Richmond — board-on-board is strongly recommended over solid board.

Appearance from both sides is the other major advantage. Board-on-board looks virtually identical from both sides — there's no "good side" and "bad side." Both you and your neighbour see an attractive fence face. This eliminates the awkward conversation about which direction the finished side faces and makes board-on-board the best choice for shared fence lines.

Cost comparison in Metro Vancouver: A 6-foot solid board cedar privacy fence typically runs $40-$70 per linear foot installed, while a 6-foot board-on-board cedar fence runs $50-$80 per linear foot. The 15-25% premium for board-on-board comes from using approximately 50% more boards (since boards overlap on alternating sides) and the additional labour for precise spacing. For a 100-foot fence run, that works out to roughly $1,000-$1,500 more for board-on-board — a worthwhile investment for the wind resistance and dual-sided appearance.

Maintenance is similar for both styles. Both need staining or sealing every 2-3 years in Metro Vancouver's wet climate. Board-on-board can be slightly more work to stain because you need to get product on the overlapping edges, but the difference is minor. Both styles use the same post and rail construction underneath.

For most Metro Vancouver residential properties, board-on-board is the better choice — the wind resistance alone justifies the modest cost premium, and the dual-sided appearance makes it ideal for shared property lines. Solid board is the right choice when you need absolute privacy with zero visibility (hot tub enclosures, for example) or when budget is the primary concern on a sheltered lot.

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