Scandinavian insulated raft foundations have now arrived in Ireland. Whether you are building to current building regulations or want to achieve low energy or passive house standard, with the help of Supergrund, we have an insulated foundation design for your building project.
Using only air as the insulating gas, the system can deliver U Values as low as 0.1W/m2K. Insulated Raft foundations are suitable for use with Timber or Block construction methods.
Building, literally on three unique properties of EPS; high compressive strength combined with extremely low water absorption and excellent insulating values, the load bearing walls and floor slab of your building sit on top of the insulating layer practically eliminating heat loss to the ground.
The most common insulated foundation system used in Ireland today is the Supergrund system. Enervate are trained installers of this system which is manufactured by Aerobord Ireland to the specifications given by Supergrund, the Swedish company who own the system. It provides precut forms for a reinforced concrete ringbeam around the perimeter of the building that are cut to suit each individual project, meaning they can then be assembled on site, like a jigsaw, to give a permanent formwork for the ringbeam that also insulated the foundation.
Under the floor slab is usually insulated with 200mm - 300mm of standard polystyrene to provide passive levels of insulation. Where there are load-bearing internal walls, carrying some of the building weight, the floor slab is thickened locally and the polystyrene underneath the wall is upgraded to a structural grade to carry these loads. The floor slab is generally reinforced with steel and reduced to 100mm thick, and extra reinforcement is used under the load-bearing internal walls. Enervate also use this system for extension projects.