The Almanac · Cluster

Sauna Stones

Which rocks belong in a sauna, how to stack them, and when to replace them — the small details that decide the quality of your löyly.

16 articles · page 1 of 2

Sauna Stones

Why Sauna Stones Crack (and How to Avoid It)

Sauna stones crack from trapped water, thermal shock and the wrong rock type. Here is why it happens and how to choose and load stones that last.

3 min read

Sauna Stones

When to Replace Sauna Stones

Replace sauna stones when they crack, crumble or the löyly weakens — typically every 1–3 years. Here are the signs to watch for and how to refresh the pile.

2 min read

Sauna Stones

Sauna Stones for Wood-Burning Heaters

Wood stoves hold a large stone mass heated by fire and flue gases. Here is how to choose, load and maintain stones for a wood-burning sauna heater.

2 min read

Sauna Stones

Buying Sauna Stones: A Quick Checklist

Buying sauna stones comes down to the right rock type, the right quantity and a good size mix. Here is a quick checklist to get it right the first time.

2 min read

Sauna Stones

Sauna Stone Size: Why a Mix Works Best

The best sauna stone pile mixes sizes: large stones at the base for mass and airflow, smaller stones on top where water lands. Here is how to get it right.

2 min read

Sauna Stones

How Stone Arrangement Affects Your Löyly

The way you arrange sauna stones — loose vs packed, size gradient, airflow — shapes how good the löyly is. Here is how arrangement changes the steam.

2 min read

Sauna Stones

Peridotite Sauna Stones: Dense and Durable

Peridotite is a very dense igneous sauna stone that stores heat well and resists cracking. Here is how peridotite compares to olivine diabase and when to choose it.

2 min read