Care

How to Flatten a Rug: Fold Lines and Curled Corners

By Storied Rugs9 min read

In stock now: 2006 Persian rugs

A red Persian rug with rows of octagon motifs lying flat on pale spruce planks in a dark timber cabin with a wood stove.

A rug that arrives folded usually flattens on its own within a week or two, once it is unwrapped and walked on in a warm room. If a corner still lifts after that, roll it loosely the other way for a few hours, then weight it flat for a day or two. Keep steam, water and irons away from it.

Our rugs travel folded, wrapped and insured, and a folded rug remembers the trip. You may see a line or two across the field, the main background of the rug, where it was folded. A corner or an edge may lift off the floor. Both are normal. Wool is springy and a hand-knotted foundation flexes, so with time, warmth and a little weight the rug settles into the floor.^[1] This page covers the first few days, what to try if a corner will not lie down, and the things that do real damage to a vintage wool rug.

Red and navy Hamedan rug just unpacked on honey pine boards, fold lines crossing it in low sun, a linen sofa and folded wrapping beside — A rug straight out of its box, with the fold lines from the trip across it. The pile leans the other way along each line and catches the light, and a week or two underfoot settles it.

Fold lines and curled corners are two different things

A fold line is a crease across the rug where it was folded for packing. It shows as a slightly raised ridge, or as a line where the pile leans a different way and catches the light. It comes from the trip, not from the rug, and it is the easier of the two to fix.

A curl is an edge or a corner that lifts off the floor or turns under. Sometimes it comes from how the rug was stored, rolled the same way for years. Sometimes it comes from the rug itself. The edges of a hand-knotted rug are wrapped by hand, and a side cord or end binding that is a little tighter than the field will pull a corner up.

Corner of a cream Turkish rug with rose and sage flowers curling up off a dark walnut floor, its knotted back showing the same flowers — A curled corner. The edge lifts off the floor while the rest of the rug lies flat, often because the binding is a little tighter than the field.

Curls like that are usually fixed when a rug is restored. In our own process, curled corners are stretched flat and stitched so they sit down. Even so, a restored corner can lift again for a while after being folded for shipping.

How to flatten a new rug: time and footsteps

Unwrap the rug as soon as it arrives. Lay it face up in the room where it will live, then use the room normally. Walking on a rug is the gentlest way to flatten it. Each step presses the fold line down a little, and the pile stands back up around it. Most fold lines soften within a few days and are gone within a week or two.

Warmth speeds this up, because wool is more pliable when it is warm. A rug that spent a day in a cold delivery truck in January will take longer to settle than one that arrives in July. Give it a warm room and a few days before you decide it needs help.

How to flatten a rug that was rolled

A rug that was rolled, for delivery or for years in storage, tries to curl back along its length, mostly at the two ends. Unroll it face up in a warm room and put something heavy and flat along each curling end for a day. Then let people walk on it as usual. If the ends still lift after a few days, roll the rug loosely the other way for a short time, as described next. A roll that sat in a closet for years can take longer to settle than a rug fresh out of its box. How to store a rug explains how to roll one so it comes out flatter next time.

Reverse-roll a curled edge

If an end or a side still curls after a few days, roll the rug loosely the opposite way. For an edge that curls up, that usually means rolling it with the pile facing out. Leave it rolled for an hour or two, or overnight for a stubborn curl. Then unroll it and lay it flat again. Do not roll it tightly or force it. The aim is to undo the curl, not to bend the foundation hard the other way.

This is a short fix, not a way to store a rug. For storage, the advice on our care page still stands: roll it pile side in, around a tube, wrapped in something breathable.

Camel and blue floral Persian rug rolled loosely with the pile facing out on pale oak boards at the foot of a white iron bed — Rolling a rug loosely the other way, with the pile facing out. A few hours like this, or a night for a stubborn curl, takes out the curve it picked up in storage.

How to flatten a curled rug corner

For one corner that will not lie down, lay the rug flat. Fold the corner back gently the opposite way for a minute, then put it down and weight it. A stack of heavy books works well. Put a clean towel or a flat board under the books so the weight spreads over the whole corner instead of pressing into one spot of the pile. Leave it for a day or two.

Furniture does the same job for longer. If a sofa leg or a chest can stand on that corner, it will hold it flat while the wool settles.

If a corner is still stubborn, a little warmth helps. Set a hair dryer to warm, not hot, and hold it a few inches from the back of the corner for a minute or two. Put the weights on right away, while the wool is still warm. Keep the dryer moving and keep it off the face of the rug. That is as far as we would go at home.

Red Persian Kashan runner with navy medallions lying flat on honey oak boards in a sage green hall with a console and bench — A Kashan runner, 2 feet 11 inches by 9 feet 7 inches, lying flat down a hall. A long, narrow rug has less weight on its edges than a room-size one, so it is often the first to show a lifted corner.

A pad keeps it flat

Once the rug has settled, a pad keeps it that way. Choose a felt and rubber pad, cut about an inch smaller than the rug on every side. It gives the rug something to grip, stops it creeping and lets the border lie flush with the floor. A rug that shifts every day gets pushed into ripples that look just like a curl. We compare the options in Rug Pads 101.

While you wait for a pad, reusable corner grippers that hold the floor by friction are fine for a while. Avoid anything that sticks to the back of the rug. Double-sided carpet tape leaves adhesive in the foundation. On a vintage rug that residue collects grit and is very hard to get out.

Flat edges matter for safety, too. A lifted corner is easy to trip on, and it can catch the wheel of a walker or a wheelchair.^[2] Rugs for wheelchairs and walkers goes into that in more detail.

What not to do

Each of these is a normal thing to try on a new synthetic rug. None of them belongs near a hand-knotted wool one.

No steam iron on the pile. Heat and moisture together can make dyes run and shrink the cotton foundation.^[3] That is how a small curl becomes a permanent one. The same goes for steam cleaners.
No soaking or wetting to relax it. A wet wool rug has to dry evenly, or it may never lie quite flat again. A patch of damp foundation that dries slowly also invites mildew.^[4] Water belongs in a proper wash, not in a flattening job.
No hard ironing of a crease. Even a dry iron pressed into a fold line crushes the pile into a shiny stripe and can scorch the wool. A fold line fades with time. A pressed stripe does not.
No tape, glue or pins on the back. Adhesive, hot glue and tacks all damage the foundation or the floor, usually both.^[5]
No trimming. Cutting into a curling edge or the fringe to make it lie down removes the structure that holds the knots in place. The fringe is the loose end of the warp, the threads that run the length of the rug.^[6] It is not decoration.

When to ask a professional

Most rugs need nothing more than the steps above. It is worth asking a specialist rug restorer when:

A corner lifts again every time, even after a week or two of weights and reverse rolling.
A whole side ripples like a wave. That usually means the edge binding is tighter or looser than the field. The fix is to rebind the edge, not to add weights.
The rug will not lie flat in the middle, even on a pad and a level floor.
The foundation feels stiff or dry, or cracks when you bend it. Stop bending it at that point, because old, dry cotton can break.

A restorer can stretch the rug flat on a frame and dry it evenly, which is called blocking.^[7] They can also stitch a corner so it sits down, the same repair the specialists we work with make when they wash and restore a rug. Ask for someone who works on hand-knotted vintage rugs. Persian rug repair explains what these jobs involve and when they are worth paying for.

If the rug came from us and a corner still will not settle after two weeks, send us a photograph. We will tell you what we see.

A rug that lies flat wears evenly, and even wear is a big part of what keeps a vintage rug going for another fifty years. The rest is on our rug care page.

For day-to-day care from here, cleaning a wool rug at home covers the routine. Protecting a rug from sun, pets and spills covers the accidents, and layering rugs over carpet and hardwood deals with rugs on softer floors.