H+H can trace its beginnings back to 1909, when contractor Henrik Johan Henriksen and tileworks owner Waldemar Kähler established a joint gravel pit enterprise. The company later expanded, including H+H Gasbeton (now: aircrete) and Rockwool. The Henriksen and Kähler families split their businesses in 1962, and H+H's activities have since been rooted in aircrete. The H+H aircrete activities in the UK were originally established by Christiani & Nielsen in 1949, but entered into cooperation with H+H in 1958, and today the UK company is 100%-owned by H+H. In the period 1998-2003, non-core activities were divested and aircrete activities in Finland, Norway and Germany were acquired and also established in Sweden. In 2005 and 2006 H+H acquired five aircrete factories in Poland and one aircrete factory in the Czech Republic. In 2006 H+H established sales companies in Ukraine and Slovakia, and in 2007 a sales office for the Baltic States was established in Latvia. In 2008 sales offices were established in Belgium and the Netherlands. At the end of 2008 the Jämerä activities in Finland were spun off into a separate legal entity. In 2009 a new factory was opened in Russia.

The products are sold partly as system solutions for buildings, and partly as components in the form of blocks as well as wall and floor elements.

H+H sells its products to contractors, developers and builders' merchants. H+H does not act as contractor itself.

H+H's geographical markets are:

• Western Europe: Belgium, Denmark, Finland, Germany, Netherlands, Norway, Sweden and UK
• Eastern Europe: Baltic States, Czech Republic, Poland, Russia, Slovakia and Ukraine

H+H has sales organisations in each of these countries as well as manufacturing facilities in the UK, Germany, Poland, the Czech Republic, Russia and Finland.

The share capital of the H+H Group's parent company, H+H International A/S, amounts to nominally DKK 490,500,000 divided into 9,810,000 shares. The company's shares are listed on NASDAQ OMX Copenhagen A/S.