For our building material, we have chosen high quality spruce from central Finland. We buy our logs from well known sawmills on annual contracts, the mills classify and dry the logs to approved values.
Timber-hirsi belongs to the Association of the log industry and we follow the industry rules. The quality requirements of the log material are a little above the industry standard and we use the same export quality in our domestic sales.
For the corner joints we use kombriband tape which makes the corners very tight. We use a flax band for the tongue and groove joint.