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.