What a draft stopper is and why you need one

A draft stopper is a fabric tube filled with insulation material that blocks cold air from leaking under doors and around windows. You sew it yourself from two pieces of fabric, a needle, thread, and whatever filler you have on hand — sand, rice, dried beans, or polyester fiberfill all work. The finished stopper sits on the floor against the bottom of a door or wedges into a window frame, and it costs between two and eight dollars in materials depending on what you already own.

Homemade draft stoppers reduce heating bills in winter by stopping air movement through the gaps that exist in almost every older home. They also block dust, insects, and noise. Unlike weatherstripping, which requires tools and permanent installation, a draft stopper is portable — you can move it between rooms or take it with you when you move.

Key Takeaways

  • A draft stopper is a sewn fabric tube filled with sand, rice, beans, or fiberfill that blocks air leaks under doors and around windows.
  • You need two pieces of fabric (old clothing, sheets, or new fabric work equally well), thread, a needle or sewing machine, and filler material.
  • The basic method is to sew two fabric pieces together on three sides, turn it right-side out, fill it, and sew the opening closed.
  • A draft stopper for a standard door takes about 30 minutes to sew by hand and costs less than ten dollars in materials.
  • Measure your door or window gap before you cut fabric so the finished stopper fits snugly without bunching.

Gather your materials and measure your space

You need two pieces of fabric, each the same size. The length should match the width of your door or window opening — measure the gap where air comes through. Standard interior doors are 32 to 36 inches wide; measure yours to be sure. The width of each fabric piece should be 4 to 5 inches, which gives you enough material to sew a seam and create a tube about 3 inches in diameter when filled.

For fabric, use anything you have: old t-shirts, sheets, pillowcases, or curtains. New quilting cotton or fleece from a fabric store costs three to six dollars per yard and lasts longer than thin material. Avoid stretchy knits like jersey unless you reinforce the seams, because they can split when filled.

For filler, dried beans, rice, or sand work best because they are heavy and conform to the shape of the gap. Polyester fiberfill is lighter and easier to wash out if you need to open the stopper later. A standard door-width stopper needs about two to three cups of filler. Keep the filler dry — moisture causes mold and odor.

Cut and prepare your fabric pieces

Lay both fabric pieces flat and cut them to the same size. If you are using old clothing, cut away seams and hems first so you have flat material. Mark your cutting lines with a pencil or chalk so you stay straight. Cut one piece 36 inches long and 4 inches wide for a standard door, or adjust the length to match your measurement.

Stack the two pieces with the right sides (the pretty sides) facing each other. This is called "right sides together." Pin them along the edges so they do not slip while you sew. If you do not have pins, you can hold them in place with your fingers, but pins make the work faster and neater.

Sew three sides of the tube

Using a needle and thread or a sewing machine, sew along three of the four long edges. Leave one short end open — this is where you will pour in the filler. Use a straight stitch and keep your seam about half an inch from the edge of the fabric. If you are sewing by hand, use a running stitch (in and out, in and out) and make your stitches as even as you can, about one-eighth inch apart.

Sew the two long sides first, then one short end. The remaining short end stays open. Backstitch at the beginning and end of each seam to lock the thread so it does not unravel — push the needle backward through the last few stitches, then forward again. If you are using a sewing machine, set it to a medium stitch length and sew slowly so the fabric does not bunch.

Turn the tube right-side out and fill it

Reach into the open end and grab the fabric from the inside. Pull gently until the tube turns inside out and the right sides (the pretty sides) are now on the outside. This takes a little patience — work slowly and use a pencil eraser or wooden spoon handle to push out the corners if they stay tucked inside. Once it is turned, the seams should be hidden on the inside.

Pour your filler material into the open end using a funnel or a rolled piece of paper. Fill the tube until it is firm but still flexible — you should be able to bend it without hearing the filler shift too much. Do not overfill, or the seams will strain and split. Stop when the tube feels like a rolled towel.

Close the open end with a ladder stitch

Fold the raw edges of the open end inward about half an inch and pin them closed. Use a ladder stitch (also called a whip stitch) to sew the opening shut. This stitch is nearly invisible because the thread runs inside the fold of the fabric.

Thread your needle and tie a knot at the end. Bring the needle up through the fold on one side of the opening, then across to the fold on the other side. Push the needle into the fold, slide it along inside the fold for about half an inch, and come back out. Cross back to the first side and repeat. The thread stays hidden inside the fold, and the opening closes as you pull the thread tight. When you reach the end, tie off the thread on the inside.

If you are using a sewing machine, you can sew the opening closed with a straight stitch instead. Fold the edges inward, pin them, and sew slowly along the fold. Machine sewing is faster but leaves a visible seam on the outside.

Position your draft stopper and check the fit

Place the finished stopper on the floor against the bottom of the door or window. It should fit snugly in the gap without bunching or leaving space on either side. If it is too long, it will fold up and create a tripping hazard. If it is too short, air will leak around the ends. If the fit is wrong, you can open one end with a seam ripper, remove some filler, and sew it closed again.

For doors that swing open, place the stopper on the inside of the room so it does not interfere with the door's movement. For windows, wedge it into the frame where the sash meets the sill. Some people sew a handle loop to one end so the stopper is easier to move or remove for cleaning.

Frequently Asked Questions

Can I use a sewing machine instead of sewing by hand?

Yes. A sewing machine is faster and creates stronger seams. Set it to a medium stitch length, use all-purpose thread, and sew slowly so the fabric does not bunch. Backstitch at the start and end of each seam. If you have never used a sewing machine, practice on scrap fabric first.

What is the best filler material?

Dried beans, rice, and sand are heavy and stay in place. Polyester fiberfill is lighter and easier to remove if you need to wash the stopper. Do not use materials that absorb moisture, like newspaper or cotton batting, because they can mold. Avoid anything with a strong smell that might transfer to your home.

How do I clean a draft stopper?

Wipe the outside with a damp cloth to remove dust. If the fabric is washable, you can open one end with a seam ripper, pour out the filler, wash the tube in cool water, dry it completely, and refill it. This takes about an hour but extends the stopper's life.

Will a draft stopper work on a sliding glass door?

Yes, but you need a longer stopper. Measure the width of the door opening and cut your fabric pieces to that length. A sliding glass door stopper works the same way as a regular door stopper — it sits on the floor and blocks air from leaking underneath.

Can I make a draft stopper without a sewing machine or needle?

You can use fabric glue instead of sewing, though the seams will not be as strong. explore fabric glue along the edges, press the fabric together, and let it dry according to the glue instructions. This method works for light-duty stoppers but may fail if the stopper is moved frequently.