Install a Valance or Cornice Board Above Curtains

The difference between a window that looks dressed and one that looks finished often comes down to what you do above the rod. A valance or cornice board hides the mechanical parts—the rod, brackets, the raw edge of your curtains—and creates a horizontal frame that pulls the whole composition together. A valance is fabric, usually gathered or pleated, mounted on a simple board. A cornice is a rigid box, often upholstered or painted, that sits like an architectural crown above the window. Either way, the install is straightforward: you're hanging a board to the wall or ceiling, anchoring it securely, and attaching your finished piece. Done right, it makes a bedroom feel intentional and complete. Done poorly, it sags, wobbles, or sits crooked, undermining everything else you've done with the curtains themselves.

1. Mark Your Centerline. Measure up from the top of your curtain rod (or from the top of the window frame if you haven't hung the rod yet) to determine where the valance should sit. A typical valance sits 4 to 8 inches above the rod, depending on the height of the valance itself and your window proportions. Mark the centerline of your window with a pencil, then use a level to establish a horizontal line across the wall where the front of your valance board will sit. This line should be visible enough to work from but light enough to erase later.
2. Find Studs, Plan Anchors. Use a stud finder to locate the wall studs behind your marked line. Mark the center of each stud with a pencil. If your window is narrow or your studs don't align with where you need to mount, you have two options: mount your board into studs and accept the placement, or use a sturdy support board (1x8 or 1x10 pine) that spans the width of the window and anchors into the studs it does cross. The support board method is more forgiving and distributes weight across studs rather than trying to hit them directly.
3. Secure the Support Board. If you're using a support board to distribute weight, cut it to the width you want your valance to span—typically 2 to 6 inches beyond the window on each side. Position it on your pencil line, level it, and mark the stud locations through the board. Drill pilot holes at those marks, then secure the board with 3-inch wood screws (at least two per stud, preferably three if the board spans more than 36 inches). Use a level continuously as you tighten to keep the board from twisting. Caulk the seam where the board meets the wall if you're painting it to match the wall.
4. Mount the Brackets. If your valance comes with metal brackets or a mounting rail, position them on the support board at the height specified by the valance manufacturer, usually flush to the front edge. Brackets are typically spaced 16 to 24 inches apart. Mark the screw holes, drill pilot holes, and secure with the screws provided. Test the brackets by pushing down with moderate force—they should not flex or shift. If you're using standard shelf brackets, ensure they're rated for the total weight of your valance plus fabric and hardware.
5. Build Your Valance. If you're making your own valance, start with a board cut to length—typically the width of your window plus 4 to 12 inches on each side for returns (the short pieces that drop down at the corners). A 1x4 or 1x6 pine board works well. Paint or stain it to your preference and let it dry completely. If you're wrapping it with fabric, add the fabric now before mounting: stretch batting or polyester batting across the face and staple it to the back, then wrap your fashion fabric over the batting and staple it to the back as well, mitering the corners for a clean appearance.
6. Lift Into the Brackets. Lift the valance or valance board and set it into the brackets. If the brackets have a lip or slot, the board should slide in; if they have pre-drilled holes, line them up and secure with the fasteners provided. Once the board is seated, tighten all fasteners fully. Check that the board is level along its entire length and that it sits at the same height on both sides of the window. Open and close your curtains once to ensure they don't catch on the edges and that the mounting is solid.
7. Install Return Pieces. Some valances have separate return pieces that drop down at the ends to cover the wall between the valance board and the curtain rod. These are usually fabric-covered and can be glued or screwed on. If gluing, use a construction adhesive suitable for wood and fabric; if screwing, use short wood screws into the side of the valance board. Make sure the returns are aligned vertically and sit flush against the wall.
8. Position the Curtain Rod. If you haven't already hung your curtain rod, do so now, positioning it below the valance. The rod typically sits 4 to 6 inches below the valance board. Hang the rod on its brackets, which should be screwed into studs or solid support. If the valance is sitting lower than intended because the rod brackets are in the way, you may need to angle or nest the rod brackets slightly, or adjust the valance height upward. The goal is for the valance to appear to float above the rod with a clean gap between them.
9. Test Curtain Movement. Hang your curtains on the rod as you normally would. Open them fully and check that they don't catch on the valance board or its edges. If the curtains bunch or snag, you may need to adjust the valance height slightly or ensure the curtain rod is positioned far enough forward that the curtains clear the valance when drawn. This is a fine-tuning step—it usually requires only a few inches of adjustment, which you can make by adding spacer brackets under the valance board or moving the curtain rod slightly forward.
10. Seal Gaps. If there are visible gaps between the valance board and the wall, or between the support board and the wall, apply caulk to seal them. Use paintable caulk that matches your wall color or the color of your valance board. This keeps dust from collecting, improves the finished appearance, and reduces light leaks around the sides. Apply a thin, even bead and smooth it with a wet finger or caulk tool. Let it dry per the manufacturer's instructions before painting or applying finish.
11. Paint the Board. If your support board is visible at the sides or top, paint it to match your wall or your valance. Use the same paint you used on the walls or a complementary trim color. Two coats usually provide good coverage. If you've already caulked the seams, this paint will cover them and create a seamless appearance. Finish any visible wood edges the same way.
12. Step Back and Assess. Wipe down the valance, brackets, and wall with a dry cloth to remove dust and pencil marks. Stand back and observe the installation from the room—check that the valance is level, that the spacing between it and the rod is even, and that the curtains hang properly. Look for any visible fasteners, gaps, or misalignment. Make any final micro-adjustments: a fastener that's crooked, a return that's sitting proud of the wall, or a gap that's bigger on one side.