Floor insulation must be able to withstand the deadload of the floor construction and the imposed loads resulting from occupation of the building. Ballytherm has a sufficiently high compressive strength for it to be used in domestic projects.
U-values for ground floors are calculated according to EN ISO 13770: 2007. Because the ground has an innate thermal resistance the overall thermal performance of the floor depends upon the floor’s dimensions and form factor, represented by the ratio P/A (the floor perimeter, P, divided by the floor area, A) as well as the insulation and other layers in the construction.