How Indoor Ice Rinks Work

By the Ice Skating Near You Editorial Team · October 7, 2026 · 8 min read

An indoor ice rink is basically a giant, carefully controlled freezer floor. A refrigeration system pumps a chilled fluid through pipes buried in a concrete slab, which keeps the slab below freezing.

Crews then spray thin layers of water onto that cold slab, building up a smooth sheet of ice layer by layer.

Add painted lines, an ice resurfacer and careful control of the air, and you get the glassy surface you glide across. Here is how all the pieces fit together.

The Refrigeration System

The ice is only the top of the story. Most of the work happens out of sight, below the surface and in a mechanical room nearby.

Pipes Under the Slab

Beneath the ice sits a concrete slab, or in some rinks a bed of sand, with a network of pipes running through it. The pipes run back and forth across the entire rink in closely spaced rows, so the whole surface cools evenly.

A cold fluid flows through those pipes, pulling heat out of the slab and the ice above it. Keep the slab cold enough, and the water on top freezes and stays frozen.

Brine or Glycol

The fluid in the floor pipes is usually not plain water, since water would freeze inside the pipes. Instead, many rinks use one of two common options:

• Brine, a salt solution such as calcium chloride mixed with water. Salt lowers the freezing point, so the brine stays liquid well below water's freezing point.
• Glycol, an antifreeze-type solution that also stays liquid at low temperatures.

That fluid travels in a loop. It picks up heat from the floor, flows back to the mechanical room, gets chilled again, and returns to the floor.

The Chiller

In the mechanical room, a refrigeration system, often called the chiller, cools the brine or glycol. It works on the same basic principle as your kitchen fridge: a refrigerant absorbs heat, gets compressed, and releases that heat elsewhere.

Rinks use various refrigerants depending on their design and age. Some systems capture the waste heat and reuse it, for example to warm parts of the building or melt the snow shaved off the ice.

Insulation and Heated Subfloors

Keeping the ground under a rink frozen all season can cause a problem called frost heave, where freezing soil expands and pushes the slab upward.

To prevent it, many permanent rinks place insulation below the cooling pipes, and some add a gently heated layer underneath to keep the ground from freezing.

How the Ice Is Built

You cannot just flood a rink and wait. A thick pour of water freezes slowly and unevenly, and it can crack or trap air. Instead, crews build the ice in many thin layers.

1. Chill the slab. The refrigeration system brings the floor down below freezing first.
2. Mist the first layers. Crews spray a fine mist of water across the slab. Each thin coat freezes quickly before the next one goes down.
3. Paint the base white. Once there is a thin base of ice, the whole surface is painted white with special paint made for ice. This is why rink ice looks white instead of gray concrete.
4. Seal the paint. More thin layers of water lock the white paint in place.
5. Add lines and logos. Crews paint hockey lines, circles, creases and any logos or designs, usually with careful measuring and stencils.
6. Seal again and build up. Layer after layer of clear ice covers the markings until the ice reaches the desired thickness.

The process can take days. When the ice comes out at the end of a season, it is usually melted or broken up, and the whole process starts over for the next one.

Why the Lines Look Like They Float

Because the paint sits under clear ice, the lines and logos look sharp and slightly below the surface. Skaters never actually touch the paint, which is why markings do not wear off during games or sessions.

How Thick Is Rink Ice?

Indoor rink ice is often around an inch thick, give or take, and it varies from rink to rink. That may sound thin, but the ice is sitting on a solid slab, not floating on water like a pond. You can read more about natural ice in is pond ice safe to skate on.

Rink operators aim for ice that is thick enough to protect the paint and handle skating, but not much thicker. Thicker ice takes more energy to keep cold and is harder to keep at a consistent temperature at the surface.

Ice Resurfacers: The Rink's Best Friend

Skate blades carve grooves, scratches and snow into the ice. Left alone, the surface gets rough, bumpy and slow. That is where the ice resurfacer comes in.

Many people call any resurfacing machine a "Zamboni," but Zamboni is actually a brand name that is commonly used generically. Rinks use resurfacers from various makers, and they all do roughly the same job.

What a Resurfacer Does

1. Shaves the surface. A sharp blade underneath shaves a thin layer off the top of the ice, removing grooves and rough spots.
2. Collects the snow. An auger gathers the shavings and carries them into a storage tank on the machine.
3. Washes the ice. On many machines, water rinses dirt and debris out of the deeper grooves, and the dirty water is picked up again.
4. Lays down fresh water. A thin film of warm or hot water is spread across the surface by a cloth or towel dragged behind the machine. Warm water helps the new layer bond well and freeze smoothly.

The new layer freezes in minutes, leaving a fresh, glassy sheet. Afterward, the machine dumps its load of snow in a melt pit or outside.

Rinks typically resurface between sessions, between periods of hockey games and before figure skating events. Learn how this fits into the day in public skating sessions explained.

Edging and Other Maintenance

Resurfacers cannot reach right up against the boards, so ice can build up along the edges. Crews use smaller edging machines to shave down those areas. They also check ice thickness and fill holes or soft spots as needed.

Why Indoor Rinks Are So Cold

If you have ever wondered why you need a jacket inside, it is not just the ice giving off cold. Rinks keep the air cool on purpose.

• Protecting the ice. Warm air melts the surface and makes it slushy, forcing the refrigeration system to work harder.
• Saving energy. Every bit of heat that reaches the ice has to be pumped back out by the chiller.
• Stable conditions. Cooler air helps keep the ice surface consistent for skaters.

Many rinks heat spectator areas, lobbies and locker rooms while keeping the air right above the ice cool. Our guide on what to wear ice skating will keep you comfortable either way.

Dehumidification: Fighting Fog and Drips

Humidity is a big deal in an ice rink. Warm, moist air hitting cold ice causes several problems:

• Fog. Moisture can condense into a low fog over the ice, making it hard to see.
• Dripping ceilings. Condensation can form on cold surfaces overhead and drip onto the ice, creating bumps and frost spots.
• Soft or frosty ice. Moisture settling on the ice can leave a rough, frosty surface.
• Building damage. Ongoing condensation can lead to mold and corrosion.

To prevent this, many indoor rinks use dehumidification systems that pull moisture out of the air. These systems often work hardest in warm, humid weather, when lots of moist outside air finds its way in.

Hockey Ice vs Figure Skating Ice

Not all skaters want the same ice. Rink operators often adjust the ice temperature depending on who is using it.

	Hockey	Figure skating
Preferred ice	Colder and harder	Usually slightly warmer and softer
Why	Hard ice is fast, holds up to hard stops and cuts, and keeps the puck sliding well	Softer ice gives edges more grip and cushions landings from jumps

Because changing ice temperature takes time, rinks that host both sports often settle on a compromise or adjust ahead of key events. Rinks with more than one sheet of ice may set each sheet differently.

The difference in ice preference echoes the difference in the skates themselves. See figure skates vs hockey skates for more, and how often to sharpen ice skates to keep your blades ready for any ice.

The Short Version

• A chiller cools brine or glycol, which flows through pipes in the slab under the ice.
• The ice is built in many thin layers, with white paint, lines and logos sealed underneath.
• Rink ice is often around an inch thick, varying by rink.
• Ice resurfacers shave, clean and lay fresh water to keep the surface smooth.
• Cool, dry air protects the ice and keeps fog and drips away.

Ready to head out? Browse ice rinks by state or search the directory.

Frequently asked questions

How thick is the ice at an indoor rink?

Indoor rink ice is often around an inch thick, though it varies from rink to rink. Thinner ice is easier and more efficient to keep cold, so rinks avoid building it thicker than needed.

How do they get lines and logos into the ice?

Crews build a few thin layers of ice, paint the whole surface white, then paint lines and logos on top. More layers of clear ice are added over the paint to seal and protect it.

Is Zamboni the name of the machine that cleans the ice?

Zamboni is a brand name for one maker's ice resurfacers. People often use it generically for any ice resurfacing machine, much like other brand names that became everyday words.

Why is the ice different for hockey and figure skating?

Hockey players generally prefer colder, harder ice that stays fast and holds up to quick stops. Figure skaters usually prefer slightly warmer, softer ice that grips edges better and cushions jump landings.

Why are indoor ice rinks so cold?

The air is kept cool to help protect the ice and reduce the load on the refrigeration system. Rinks also control humidity, since moist air can cause fog, dripping and soft ice.