September 18, 2026
Kallio school: 41% less heating energy after one year
Measured results from the first full heating season after the energy renovation.
News
Projects, results, and announcements.
June 3, 2026
Six-storey timber housing in Istanbul gets its permit
One of the first multi-storey CLT residential buildings in Türkiye moves to construction.
March 12, 2026
A free guide to moisture surveys for housing companies
Eight pages on when to order a moisture survey and how to read the report.
November 20, 2025
Arkka moves to a renovated timber building in Helsinki
Our Helsinki team now works in a 1920s building that we renovated ourselves.