Measuring for valances is the foundational step that ensures your window treatments hang flawlessly and frame your space with the right aesthetic. A precise measurement eliminates the frustration of a valance that is too short, comically oversized, or misaligned with the width of your window. This process requires nothing more than a reliable metal measuring tape, a notepad, and a commitment to accuracy at three key points: width, drop, and mounting height.
Essential Tools for Accurate Measurement
Before you begin, gathering the right tools streamlines the process and guarantees professional results. You will need a sturdy metal measuring tape for precision, a notepad and pen to record dimensions, and possibly a step stool for high windows. While a level is not always necessary, it is helpful if you want to ensure your mounting brackets are perfectly aligned, especially for wider valances or ornate styles that sit close to the glass.
Measuring the Width
The width of your valance should match the width of the window frame or the intended coverage area exactly. Place the zero end of your tape measure at the far left edge of the window frame or the spot where the valance will start, and extend it to the far right edge. Record this number as your base width. If you are installing the valance inside the window frame, measure the interior width carefully; if it sits on top of the frame or extends beyond the jambs, measure the total span you wish to cover to ensure the fabric drapes elegantly without gaps.
Determining the Drop Length
The drop refers to the vertical length of the valance, which dictates how much fabric cascades downward and how dramatic the silhouette appears. Standard drops usually range from 4 to 12 inches, depending on whether you prefer a shallow swag or a more elaborate, cascading effect. To measure, decide where the bottom edge of the valance should fall—typically just above a window ledge or at the top of the window molding—and measure that specific distance. For instance, if you want the valance to sit 6 inches below the curtain rod and the rod is 8 inches from the window frame, your drop would be 14 inches.
Accounting for Mounting Hardware
One of the most overlooked aspects of measuring is accounting for the hardware that secures the valance. If you are using a wooden board, plastic valance, or heavy fabric, the mounting bracket adds depth and height to the installation point. Measure the thickness of the bracket or board and add this to your drop measurement to determine the true length of fabric or material you need. This ensures that when the hardware is hidden behind the valance, the final look aligns perfectly with your calculations.
Calculating Mounting Height
Mounting height dictates where the valance sits on the wall and heavily influences the proportion of the window. For a balanced look, position the mounting location approximately 4 to 6 inches above the window frame or directly on the molding if you want a built-in appearance. Measure from the floor to your intended mounting point to confirm the height feels comfortable within the room’s layout. This vertical placement ensures the valance draws the eye upward, enhancing the perceived height of the ceiling without creating a cramped or awkward feel.
Documenting and Double-Checking
To avoid errors, write down each measurement clearly and verify them before cutting fabric or purchasing materials. Revisit the window to confirm that the tape measure was level and that the trim or molding width was included where relevant. If you are working with a custom design, such as a tailored cornice or a gathered valance, add a quarter-inch to each side for seam allowances. This extra buffer provides flexibility during construction and guarantees a snug, polished finish.
Adjusting for Decorative Elements
Decorative valances often feature tailored corners, box pleats, or ornate brackets that require additional planning. For sharp corners, measure the depth you want the valance to extend and factor in the seam where the side meets the front. If the design includes a center stack or overlap, ensure the total width accounts for this closure so the valance hangs smoothly when closed. By visualizing the final shape and adjusting the measurements accordingly, you prevent awkward bunching or misalignment that can detract from the overall look.
Practical Tips for Success
- Always round up to the nearest 1/8 inch when cutting fabric to allow for hems.
- Take measurements at multiple points if the window frame is uneven.
- Use painter’s tape to temporarily mark the mounting location to visualize the scale.
- When in doubt, choose a slightly larger drop; excess fabric can be easily trimmed later.