Celcon Elements are storey-high panels of aircrete used to form the inner leaf of external walls, separating walls and internal partitions as appropriate.

Celcon Elements are craned into place onto standard foundations and installed using H+H element mortar – a fast-setting and very strong mortar that forms a 2mm airtight joint. The entire ground floor of a house can be installed in a single day: an effective Modern Method of Construction based on a masonry material.

The overriding advantage of Celcon Elements is the speed of build – and this is best demonstrated where the panels are used as part of a complete housebuilding package, ideally with prefabricated timber floors and roofing systems.

In 2016, H+H worked in collaboration with Roofspace (now part of St Gobain) to develop the I-House System. This package includes timber I-Joist floor cassettes and a roof either of standard truss construction or the ‘Roofspace I-Roof’ panelised roof system. The I-House System also includes all lintels and insulation – fixed to the exterior of the Celcon Elements panels and in between separating walls.

Using the I-House System, the entire weatherproof structure of a standard two-storey (or two storey with room in the roof) house design can be delivered within two weeks.  The use of this building method provides the speed of offsite with the reassuring familiarity and proven performance of masonry build.

>This method of building is an ideal Modern Method of Construction which is now recognised by the NHBC.  The I-House System has also been certified by the Build Offsite Property Assurance Scheme providing assurance of its 60-year lifespan.

In 2017 this innovative building solution was recognised in the Housebuilder Awards, winning the Best Building Fabric product award and going on to win the overall Product of the Year category in the main Housebuilder Awards. In the same year the solution was also shortlisted in the Offsite Awards, and the British Construction Industry Awards.