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Carpet Rippling Or Wrinkling
Waves or ridges have appeared across a fitted carpet, often running the width of a room or across a landing.
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What's happening?
A stretch-fitted carpet is held under tension between gripper rods at the perimeter. Ripples mean that tension has been lost. The most common cause is a carpet that was laid using a knee kicker alone rather than being power-stretched, so it never reached its intended tension and has relaxed into waves within a year. The others are humidity — a carpet backing takes up moisture in a damp room and expands — furniture being dragged, and a landing or corridor where foot traffic pushes the pile in one direction over months. It is not a sign of a faulty carpet. It is almost always fixable by re-stretching rather than replacing, which is worth knowing before anyone quotes you for new flooring.
What usually causes it?
- Fitted with a knee kicker only, without a power stretcher, so it was never at full tension
- Humidity and temperature changes causing the backing to expand, common after a damp winter
- Heavy furniture dragged across the carpet, pushing the backing off its grippers
- Gripper rods too far from the wall, poorly fixed, or fixed into a crumbling floor edge
- Underlay that has broken down or moved, so the carpet is no longer bearing evenly
- Traffic on a landing or corridor walking the pile in one direction over time
- A carpet moved from another room and refitted without being re-stretched to the new dimensions
Is it dangerous?
A ripple is a trip hazard, and a bad one on a landing or at the head of a staircase is a serious one. Falls are among the most common causes of serious injury in the home, particularly for older people, so a wave that catches a foot should be dealt with rather than lived with.
Can I fix it myself?
Not really. Re-stretching needs a power stretcher and the carpet has to be released from the grippers along at least two walls and re-trimmed, which is skilled work that goes wrong quickly if the carpet is over-stretched or the edge is trimmed short. In the short term, move the furniture off the ripple and keep the area clear of trip risk. Do not cut a ripple out.
When should you call a flooring fitter?
Call a flooring fitter as soon as a ripple is catching underfoot, and certainly before it reaches a stair head. Re-stretching an existing carpet is a straightforward visit for a fitter and it usually restores the floor completely. A fitter will also tell you if the grippers or the underlay are the real problem, which no amount of re-stretching will cure.
What will the flooring fitter actually do?
- Check the gripper rods, the underlay and the carpet backing before deciding whether re-stretching will hold
- Release the carpet from the grippers along the walls the stretch will run to
- Power-stretch the carpet to full tension across the room rather than kicking it in
- Re-fix, trim and tuck the edges, replacing gripper rods that have pulled out of the floor
- Replace failed underlay where it is no longer supporting the carpet evenly
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