Actually one should know that oak is very hard and strong material. Oak absorbs much water therefore expands and later shrinks. Visible wood movements appear therefore we always make the lid from thermowood. Please see the picture below:
All rights reserved @2014. Disclaimer: using pictures from this website without agreement is a crime and we will take immediate legal action against the offender.
Terms & Conditions
TimberIN - Baltic SPAS & Saunas