Measuring for shiplap requires precision and a methodical approach to ensure a flawless finish. A single miscalculation can lead to wasted materials, uneven surfaces, and a project that never looks quite right. This guide breaks down the process into clear, actionable steps, covering everything from initial room preparation to the final cut.
Before you even pull out a tape measure, the installation area must be prepared. Shiplap is a transformation, not a quick fix, so the surface beneath it needs to be stable and true. This preparation phase is critical for avoiding common issues like bubbles in the backing or boards that refuse to lie flat.
Gathering Your Tools and Materials
The right tools make the difference between a stressful project and a satisfying one. You will need more than just a tape measure; a level, pencil, and straight edge are essential for accuracy. Having these items ready streamlines the workflow and prevents the frustration of stopping mid-measure to find a specific tool.
- Tape measure (25-foot recommended)
- Laser level or spirit level
- Pencil and carpenter’s square
- Straight edge or ruler
- Calculator (for waste factor calculations)
Understanding Linear Footage vs. Square Footage
Shiplap is often sold by the linear foot for accent walls or by the square foot for full-room coverage. Understanding the difference is vital for budgeting and ordering the correct amount of product. Misunderstanding this can result in ordering too little and delaying your project, or too much and wasting money.
Calculating for a Full Wall
To determine the square footage of a standard rectangular wall, simply multiply the height by the width. However, most walls feature windows, doors, and plug outlets that do not require coverage. Subtract the dimensions of these obstacles from the total wall area to find your true "coverable" space. This adjusted number represents the actual material you need to purchase.
The Critical Step of Measuring for Obstacles
One of the most detailed parts of measuring for shiplap involves accounting for windows, doors, and electrical fixtures. These obstacles dictate where your boards will need to stop, start, or be cut to size. Ignoring them leads to boards that end abruptly in the middle of a window or sit awkwardly against a door.
For electrical outlets, measure the center point of the box to determine the placement of your vertical boards. For windows, measure the height to the sill and the width of the opening to plan a clean mitered edge or a seamless transition. Sketching a quick layout of these obstacles on your measurement notes prevents confusion when you begin nailing.
Accounting for the Waste Factor
Even the most experienced DIYer encounters waste. Cuts need to be made to fit around corners, electrical boxes, and trim. Boards may need to be ripped down to fit a specific height, resulting in off-cuts that cannot be reused. Professional installers typically factor in 5% to 10% waste for standard installations, but this percentage can rise to 15% for complex rooms with many angles and obstacles.
Translating Measurements to the Wall
Once your measurements are calculated, the next phase is transferring them to the physical wall. This is where a laser level shines, as it creates a perfectly straight vertical line down the entire length of the wall. Starting with a plumb line ensures that your first board is straight, which is crucial because subsequent boards will align against it. A crooked first board guarantees a crooked finish, no matter how carefully you cut the subsequent pieces.
Marking the vertical position of each board is just as important as marking the horizontal height. Use your measurements to snap horizontal chalk lines or make pencil marks that indicate the top of every board. This grid of reference points keeps your layout consistent and saves you from constantly measuring each individual board during installation.
