Materials & Textiles Terms
Shiplap
Shiplap is a type of wooden board with a rabbeted (notched) edge that lets each plank overlap the next, creating a tight seam with a distinctive evenly spaced groove between boards. Originally a practical cladding for barns and sheds because the overlapping joint sheds water, it is now used decoratively on interior walls and ceilings for its clean, lined texture. The look is closely tied to farmhouse and coastal interiors, where the horizontal lines add character to an otherwise flat wall.
In practice
Shiplap most often appears as horizontal white-painted boards on a feature wall, a fireplace surround, or a ceiling, with thin, even gaps between planks that catch a shadow line. It reads as clean texture rather than pattern, which is why it works as a backdrop rather than a focal point competing for attention.
Why it matters
Shiplap adds architectural texture to a plain drywall room without color or pattern, which is why it anchors the farmhouse look and suits coastal spaces too. Because the interest is all in the surface, it lets a wall feel considered while staying neutral enough to build any style on top of it.
How to use it
Use shiplap on one feature area rather than every wall: an accent or fireplace wall, a ceiling, an entry, or a kitchen island face. Run the boards horizontally for the classic farmhouse feel or vertically to lift a low ceiling, paint it a crisp white or a soft muted tone, and keep the surrounding walls plain so the texture stays the highlight. Real tongue-and-groove boards give the deepest shadow line; MDF shiplap panels are a faster, cheaper approximation.
What it is made of
Traditional shiplap is solid wood (often pine) milled with an overlapping rabbet joint. Most interior shiplap today is either pre-primed MDF or plywood planks sold in easy-to-install strips, which cost less and paint cleanly, or a nickel-gap variant milled for a consistent narrow gap. For bathrooms or humid rooms, choose a moisture-resistant board and seal it, since untreated MDF can swell.
Pros and cons of shiplap
The upsides: shiplap adds instant architectural texture, hides imperfect drywall, paints cleanly, and delivers the farmhouse and coastal look people want. The trade-offs: the gaps between boards collect dust, it can date a room as trends shift, and poorly sealed board in a bathroom can swell with moisture. Used on one feature wall rather than everywhere, it stays a highlight instead of feeling overdone.
Installing shiplap
Shiplap installs over drywall or studs: find the studs, level the first board, then stack each plank so its rabbeted edge overlaps the one below, using a coin or spacer to keep the gap even, and nail through into the studs. Boards are cut to fit at doors and outlets, then nail holes are filled, corners caulked, and the wall painted. Pre-primed MDF or plywood planks make it an approachable weekend project; solid tongue-and-groove gives the deepest shadow line.
See it in practice