Guide

How long does a garden sauna last? Upkeep and warranties

Whether a garden sauna will rot in the British weather, what upkeep it needs each year, and the warranties sellers give.

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A garden sauna kept off the ground, treated once a year and built from a rot-resistant timber should last many years. We allow £150 a year for upkeep.

The timber

is wood baked at high heat so it resists rot without chemicals. and hemlock are woods that naturally resist damp. Spruce, a common pine-like wood, is cheaper and needs its outside treated more carefully. Thicker walls, 40 mm or more, hold heat better. Every sauna page shows the wood and wall thickness where published.

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A black bucket and ladle on a wooden sauna bench — Photo: Auroom Wellness on Unsplash

Warranties on the saunas we list

Cabin warranty	Garden saunas
10 years	17
5 years	21
2 years	6
Not published	54

Years on the cabin as each seller publishes them. Heaters usually carry their own maker's warranty.

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Once a year

Treat the outside timber with a breathable wood treatment. Leave the inside untreated.
Check the roof covering and the seal around the chimney or vent.
Check the stones: rearrange them, and replace any that crumble.
Re-tighten the metal bands round a barrel sauna as the wood settles.
Clear leaves and keep the base draining.

The cost guide we use puts upkeep at £100 to £200 a year: Summerhouse24.

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Common worries

"Won't it rot in the British weather?"

Choose or , keep it off the ground on a level base and treat the outside once a year. We allow £150 a year for that. Warranties on the saunas we list run up to 10 years on the cabin. How long a garden sauna lasts →

"I'm not a DIY person."

kits take two people one to two days. 3 saunas we list come with a published installation price, shown on each page, and some arrive built. Base, delivery and building →

All ten sauna worries

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