H+H International A/S is a wall building materials provider in Europe. The company has a long history dating back to 1906 and was listed in 1985. H+H International specializes in the production of aircrete (AAC) and Calcium Silicate Units (CSU) wall blocks. Aircrete was for many years the primary focus, but from 2017 and onwards, a more diverse approach was taken by expanding into Calcium Silicate Units creating a more balanced footprint for the company.