Artificial Turf Wrinkles and Buckling, Causes and Fixes

This page is for anyone whose turf has developed ripples, humps or ridges. You will learn how to tell harmless temporary wrinkles from installation faults, find the cause with a simple check, and pick a fix that matches it.

Are wrinkles in new turf normal?

Small ripples in the first one to four weeks are common, especially if the turf was installed on a cool day and then hit a heat wave. Polyurethane and latex coated backings expand when warm, and a roll that sat tightly wound in a warehouse also needs time to relax. Most of these settle once the turf has been through a few heat cycles, is fully infilled and has been walked on.

Wrinkles that are still present after a month, that get bigger each summer, or that stay in the morning when the turf is cool are installation or base problems and will not fix themselves.

What causes artificial turf to wrinkle? Causes ranked

Our ranking reflects how often each turns out to be the main cause in residential lawns.

Cause	How it presents	Fix difficulty
Not acclimated or under-stretched	Long ripples parallel to roll length, worst in afternoon	Moderate (re-stretch)
Too few nails or nails pulling out	Ripples near edges and seams, edges lifting	Easy (add nails)
Too little infill	General looseness, waves that move under foot	Easy (add infill)
Base movement or soft spots	Humps or dips that stay day and night	Hard (lift and repair base)
Laid over uneven surface (concrete, pavers)	Ridges at joints or cracks	Moderate to hard
Moisture under backing	Bubble-like humps after rain, on solid substrates	Moderate

Thermal expansion and poor stretching

A 15 ft wide roll can grow noticeably between a 60°F morning install and a 110°F surface temperature in the afternoon. Exact expansion varies with backing type, but installers plan for it by unrolling the turf in the sun for at least an hour or two and then pulling it taut with a knee kicker or power stretcher before fastening. Skip either step and the extra material ends up as ripples. The installation mistakes guide covers this alongside the other common errors.

Not enough fastening

Perimeter nails typically go every 6 to 8 inches, with field nails every 12 to 24 inches and along seams. Nails spaced 12 inches or more at the edges, or nails driven into loose base material, let the turf creep toward the hot center and bunch up.

Not enough infill

Infill is ballast. A typical sand-type fill of 1 to 2 lbs per sq ft adds hundreds of pounds across a lawn, holding the backing down and resisting expansion. Lawns installed without infill, or where infill has washed out to the edges, wrinkle far more. Check rates in our guide to how much infill you need.

Base movement

If the base has settled, swollen or been disturbed by roots or burrowing animals, the turf above will show humps or troughs that stay put in all temperatures. These are base problems wearing a wrinkle costume. Our ants and pests guide covers burrowing animals.

Hard substrates

On concrete, pavers or decks, turf is often glued or laid loose over a pad. Ridges appear at expansion joints, cracks or high pavers, and trapped moisture can raise bubbles. See turf on concrete for the correct build-up.

Diagnostic: is it heat, fastening or the base?

Morning and afternoon check. Look at the wrinkle at 8 a.m. and again at 3 p.m. on a sunny day. If it shrinks or vanishes in the cool morning, it is thermal and stretching related. If it is the same, it is base or substrate.
Press test. Step on the wrinkle. If it flattens and pops back, there is slack in the turf. If it is firm underneath, something below is raised.
Nail check. Pull back fibers at the perimeter nearest the wrinkle and count nails over 3 feet. Fewer than 4 to 6 is under-fastened. Tug the edge; if a nail lifts out easily, the base is too loose to hold it.
Infill check. Push a coin into the turf. If infill is less than about half the pile height, or if you see bare backing between fibers, add infill before anything else.
Direction check. Note which way the wrinkle runs. Ripples parallel to the roll length usually mean the turf was not stretched across its width; ripples across the roll mean it was not stretched along its length.

Fixes from cheapest to most involved

1. Wait and add infill ($0 to $250)

For a new install, give it 2 to 4 weeks of sun and traffic. Top up infill to the recommended rate and brush it in. Use the infill calculator to size the order.

2. Add perimeter and field nails ($20 to $100)

Drive additional nails between existing ones, brushing fibers aside first so heads are hidden. Work from the center of the wrinkle outward, pushing the slack toward the edge you are fastening. On loose bases, use longer spikes or drive nails into undisturbed edging.

3. Re-stretch and re-nail ($0 DIY with rented kicker, $200 to $600 hired)

Work in the warmest part of the day so the turf is at its largest.
Pull the nails along the edge nearest the wrinkle and along about 3 feet of each adjoining edge.
Use a knee kicker or a rented power stretcher to pull the slack toward the free edge.
Trim the excess at the edge with a sharp carpet knife.
Re-nail at 6 to 8 inch spacing, then top up infill and brush.

4. Repair the base underneath ($300 to $2,000+)

For humps and dips from base movement, fold back the turf, remove roots or fill burrows, re-compact, re-level with a straightedge and re-lay. Our base preparation guide gives the compaction method.

Our rule of thumb: stretch hot, nail tight, fill heavy

Most guides tell you to "stretch the turf properly" without saying when. Ours: stretch in the hottest part of the day, never in the cool morning. Turf stretched cold will always have more material than it needs once it warms up. Pair that with perimeter nails no more than 8 inches apart and a full infill load, and heat wrinkles become rare even in desert climates. Owners in very hot regions should also read our hot and desert climates guide.

How to prevent wrinkles

Acclimate turf in the sun for 1 to 3 hours before cutting.
Power stretch or knee kick in two directions before nailing.
Nail perimeters every 6 to 8 inches into a well-compacted base or into edging.
Install full infill soon after installation, not weeks later.
On hard substrates, use a suitable pad and adhesive system with planned drainage.

When to call a pro

Call your installer if wrinkles appear within the workmanship warranty, if the lawn is larger than a few hundred square feet (a power stretcher and two people make re-stretching much easier), or if humps stay in the morning, which points to the base. Re-stretching without the right tools often moves the wrinkle rather than removing it.

Frequently asked questions

Will turf wrinkles go away on their own?

Mild heat ripples on a new install often do, as the backing relaxes and infill settles over a few weeks. Wrinkles that are still present after a month, or that are visible in the cool early morning, will not go away without intervention. They tend to grow with each hot season because the loose material keeps shifting toward the slack.

Can I use a heat gun or hair dryer to flatten turf?

We advise against it. Direct heat can melt polyethylene fibers and distort the backing, and it does not remove the extra material that causes the wrinkle. The ripple usually returns once the turf cools and warms again. Re-stretching and re-nailing is the only durable fix for slack turf.

Why does my turf buckle at the seams?

Seam buckling usually happens when one side of a seam was stretched more than the other, or when the seam was glued before the turf was fully stretched. The joint becomes a hinge. Less often, the seam tape itself has shifted. The fix is to open the seam, re-stretch both sides evenly and re-glue.

Does turf on concrete wrinkle more than turf on a base?

It can, because there is no base for nails to grip and concrete surfaces get very hot. Turf on concrete is normally glued at the perimeter or across the whole area, often over a drainage pad. Wrinkles here usually mean adhesive failure, trapped moisture or an uneven slab, rather than missing nails.