What You Need to Know Before You Start

A roman blind is a window covering that folds up in horizontal pleats when you pull a cord, then hangs flat when lowered. Unlike roller blinds or curtains, roman blinds require precise measuring, fabric cutting, and installation of a wooden batten (a thin board) at the top and bottom. The sewing itself is straightforward — you are mostly joining fabric and lining in rectangles — but the accuracy of your measurements and the placement of the cord channels determine whether the blind will fold evenly and operate smoothly.

This guide walks you through measuring your window, cutting and preparing your fabric, sewing the blind together, installing the battens and cord, and hanging it. You will need a sewing machine, basic hand-sewing skills, and access to a drill or screwdriver. If you have never sewn a lined project before, roman blinds are a good starting point because the construction is logical and forgiving of small mistakes.

Key Takeaways

  • Measure your window width and decide whether the blind will sit inside the frame or cover the frame, because this changes the finished width by several inches on each side.
  • Cut your fabric and lining to the same width and length, then sew them together on three sides, leaving the bottom open so you can turn the blind right-side out and press it flat.
  • Mark and sew horizontal channels (tubes of fabric) on the back of the blind to hold the wooden battens and the cords that make it fold.
  • Insert the battens into the channels, attach the cords, and screw the top batten to the wall or window frame using a drill and wall anchors if you are not drilling into studs.
  • Test the blind by pulling the cord gently — it should fold into even horizontal pleats without twisting or bunching.

Measuring Your Window and Calculating Fabric Size

Start by deciding whether your blind will sit inside the window frame (the recess between the walls on either side) or cover the frame (mounted on the wall above and to the sides of the window). Inside-mount blinds look neater but require the frame to be deep enough to hold the batten. Cover-mount blinds work on any window and hide the frame edges.

For an inside-mount blind, measure the width of the recess at the top, middle, and bottom — windows are often slightly wider at one point. Use the smallest measurement and subtract 1/4 inch to may support the blind slides up and down without catching. For a cover-mount blind, measure the width of the window and add 2 to 4 inches on each side (so 4 to 8 inches total) to block light leaks.

Measure the height from the top of the frame to the windowsill (inside mount) or from 2 to 4 inches above the frame to 2 to 4 inches below the sill (cover mount). Add 3 inches to this measurement for the top batten pocket and seam allowances. This is your finished blind length.

When you buy fabric, add 1/2 inch to your finished width (for seam allowances on the sides) and 4 inches to your finished length (for the top pocket, bottom hem, and turning allowance). Buy the same amount of lining fabric. If your blind is wider than 54 inches (the standard width of most home-sewing fabrics), you will need to join fabric widths with a seam down the middle — plan for this when calculating yardage.

Cutting and Preparing Your Fabric and Lining

Lay your main fabric on a flat surface and use a ruler and fabric pencil or chalk to mark a rectangle the size you calculated. Cut along the lines with sharp fabric scissors or a rotary cutter. Cut your lining to exactly the same width and length. Press both pieces with an iron to remove wrinkles and creases.

Place the fabric and lining with right sides together (the pretty sides facing each other) and pin around all four edges. Sew along three sides — the top and both sides — using a 1/2-inch seam allowance and a straight stitch on your sewing machine. Leave the bottom edge completely unsewn. Backstitch at the beginning and end of each seam to lock the stitches.

Trim the corners diagonally, cutting close to the stitching without cutting through the thread itself. This reduces bulk when you turn the blind right-side out. Turn the blind through the bottom opening so the right sides of the fabric are now facing outward. Press the blind flat with an iron, paying special attention to the edges so they are crisp and even. The seam should sit exactly on the edge, not visible from the front.

Fold the raw edges of the bottom opening inward by 1/2 inch on both the fabric and lining, and press. Pin the opening closed and sew it shut by hand using a ladder stitch (also called an invisible stitch), or machine-stitch it closed 1/4 inch from the edge. Press the finished blind again.

Marking and Sewing the Cord Channels

Lay the blind flat with the lining side facing up. You will now mark horizontal lines where the cords will run. These lines become channels (tubes) that hold the cords and the wooden battens. The spacing between channels depends on how high you want each fold to be when the blind is raised — typically 4 to 6 inches apart. A blind that is 36 inches tall might have channels at 6, 12, 18, 24, 30, and 36 inches from the bottom.

Use a ruler and fabric pencil to draw a light line across the width of the blind at each channel position. Measure from the bottom edge so your lines are parallel and evenly spaced. Double-check your measurements before sewing.

Thread your sewing machine with thread that matches your lining (or use invisible thread if you want the channels to be completely hidden). Sew along each marked line, using a straight stitch and keeping the line of stitching as straight as possible. Sew from one side of the blind to the other, backstitching at the start and end. These stitched lines create the channels, but they do not yet form tubes — the tubes form when you insert the battens.

The top channel should be about 3 inches from the top edge of the blind. This space holds the top batten, which anchors the entire blind to the wall or frame.

Installing Battens and Preparing the Cords

Wooden battens are thin, flat strips of wood (usually 1/2 inch wide and 1/4 inch thick) that slide into the channels to keep the blind flat and help it fold evenly. You can buy pre-cut battens at fabric and home-improvement stores, or ask the store to cut a length of wood to your blind's width. The top batten should be slightly wider (3/4 inch) to provide a sturdy mounting surface.

Slide the battens into each channel from the side, pushing them all the way across. If a batten is too tight, sand the edges slightly. The bottom batten should sit in the lowest channel. The top batten sits in the top channel but will be mounted to the wall separately, so you can remove it temporarily if needed.

For the cords, you will need one cord for each side of the blind, plus one for the center if the blind is wider than 36 inches. Use roman blind cord (a smooth, thin cord designed not to fray) or nylon cord from a hardware store. Cut each cord to a length equal to the height of the blind plus the width of the blind plus 12 inches. This extra length allows the cord to run up one side, across the top, and down the other side, with enough slack to tie off.

Attach the bottom end of each cord to the bottom batten using a small screw eye or by tying the cord securely around the batten. Test the knot by pulling hard — it should not slip. Run each cord up the side of the blind (between the fabric and lining, or in a channel if you have sewn one), across the top, and down the other side. The cords should run parallel to each other and not twist.

Mounting the Blind to the Wall or Frame

The top batten is what holds the entire blind in place. If you are doing an inside mount, the batten will screw directly into the top of the window frame. If you are doing a cover mount, the batten will screw into the wall above the window.

Position the batten where you want it and mark the screw holes with a pencil. For an inside mount, drill pilot holes (small starter holes) into the frame using a drill bit slightly smaller than your screws. For a cover mount on drywall, use wall anchors — plastic sleeves that expand behind the drywall to hold the screw. Drill holes for the anchors, tap them in gently with a hammer, then screw the batten in place. Use at least two screws, spaced evenly along the batten.

Hang the blind by sliding the top batten into its mounting position. The blind should hang straight and not twist to one side. If it does, loosen the screws slightly, adjust the batten, and tighten again.

Gather the cords at one side (usually the right side, for right-handed operation) and tie them together with a knot. Attach a cord pull (a small wooden or plastic handle) to the knot so you can raise and lower the blind without pinching your fingers. Test the blind by pulling the cord gently — it should rise smoothly and fold into even horizontal pleats. If the pleats are uneven or the blind twists, the cords may not be tensioned equally. Loosen the knot, adjust the cord lengths so they are even, and retie.

Troubleshooting Common Problems

If the blind does not fold evenly, the channels may not be perfectly parallel or the battens may not be sitting flat in the channels. Check that each batten is pushed all the way to the sides and that no fabric is bunched underneath. If a channel is crooked, you can sometimes straighten it by carefully pulling the batten to one side or the other, but if the problem is severe, you may need to resew the channel.

If the blind twists when you raise it, the cords are not pulling evenly. This usually means one cord is shorter than the others or the knot at the bottom is not centered. Untie the cords, measure them against each other, trim any that are too long, and retie with the knot in the middle of the cord bundle.

If the blind is difficult to raise, the cords may be too tight or rubbing against the fabric. Loosen the knot at the bottom slightly so the cords have a bit more slack. If the blind still sticks, check that the top batten is level and not tilted — a tilted batten can cause friction.

If the blind sags in the middle (especially if it is very wide), you may need an additional center batten. Sew a channel down the middle of the blind and insert a batten there, then run a cord through it the same way you did for the side cords.

Frequently Asked Questions

Can I make a roman blind without a sewing machine?

You can hand-sew a roman blind, but it will take significantly longer — expect 8 to 12 hours instead of 2 to 3. The seams holding the fabric and lining together need to be strong, so hand-stitching them with a backstitch is possible but tedious. The channel lines can be hand-sewn as well. A sewing machine is not essential, but it makes the work much faster and the seams more even.

What fabric works best for roman blinds?

Medium-weight cotton, linen, and cotton blends are ideal because they hold their shape and fold evenly. Avoid very stretchy fabrics like jersey or very heavy fabrics like velvet, which can bunch or not fold smoothly. If you want the blind to block light, use a blackout lining instead of regular lining. Patterned fabrics work well as long as the pattern is not so large that it looks cut off at the edges.

Do I need to use a specific type of lining?

Standard cotton lining works fine for most blinds. If you want the blind to block light and heat, use blackout lining, which is thicker and has a special coating. Blackout lining is slightly stiffer, so the blind will fold more crisply. Avoid lining that is too thin or flimsy, as it will not support the battens evenly.

How do I clean a roman blind?

Dust the blind regularly with a soft brush or cloth. For deeper cleaning, you can vacuum it gently using the upholstery attachment. If the fabric is washable, you can remove the battens and cords and hand-wash the blind in cool water with mild soap, then hang it to dry. Do not machine-wash a roman blind, as the seams may weaken. Always check the fabric care label first.

Can I adjust the height of the folds after the blind is finished?

Yes, but it requires resewing the channels. If you want the folds to be higher or lower, you will need to mark new channel lines and sew them, then move the battens to the new channels. This is easier to do before the blind is mounted, so measure carefully before you start sewing the first time.