How to Treat Sauna Wood


Saunas are made from soft woods such as cedar or Nordic white spruce. Soft woods allow the absorption of steam, handling the swelling better than hardwoods. Since the wood has a soft, porous surface, abrasive tools can scratch the delicate timber. Harsh chemicals also penetrate the wood, damaging the integrity of the sauna. Use carefully selected tools and cleaners to treat the wood properly and avoid damaging the sauna.

Things You'll Need

  • Mild liquid detergent
  • Bucket
  • Soft-bristle brush
  • Clean cloths
  • Newspapers
  • Light-grade sandpaper

Cleaning Sauna Wood

  • Mix 1 tbsp. mild liquid detergent into a bucket of warm water.

  • Dip a soft-bristle brush into the soapy water. Rub the brush gently over the walls, benches and floor of the sauna. Continually rinse the brush in the soapy water as you clean the sauna wood.

  • Rinse soap residue from the sauna with clean, warm water in the bucket and a clean cloth. Wipe down the entire area of the sauna.

  • Leave the sauna door open to allow the wood to dry completely.

Sanding Sauna Wood Benches

  • Place newspapers around and under the sauna benches.

  • Applying light pressure, gently sand the benches with a light-grade sandpaper.

  • Wipe residue from the benches with a clean cloth after sanding.

Tips & Warnings

  • Sand benches annually if desired.
  • Never varnish, paint or stain sauna wood, as the timber must absorb and release liquid and heat in the sauna.

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  • Photo Credit sauna image by Mikhail Olykainen from
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