H & H International 

H+H International A/S engages in the provision of wall building materials and solutions in the United Kingdom, Central Western Europe, and Poland. It offers autoclaved aerated concrete and calcium silicate blocks. The company also provides foundation blocks, wall elements, and partition walls. It serves its products in the private low-rise houses, volume house builders, public sector housing, commercial, and other industries. The company's products are used primarily in residential high-rise, self-build, and renovation applications. H+H International A/S was founded in 1909 and is headquartered in Copenhagen, Denmark.