H+H, a leading manufacturer of aircrete blocks, has improved its High Strength and Super Strength Grade Celcon Blocks by lowering the density from 750 to 700kg/m3. This has resulted in improved thermal conductivity. The change has been accredited by the BBA in a new certificate.
The thermal conductivity of the blocks has been reduced to 0.18 W/mK from 0.19, which gives higher thermal performance, enabling U-Values to be reduced further and diminishing heat loss at junctions.
The High and Super Strength Grade Celcon Blocks are available in thicknesses of 100, 140 and 150mm.
The High Strength Grade Celcon Blocks are also available in a thickness of 215mm, weighing less than the HSE maximum block weight requirements of 20kg. A range of blocks suitable for foundations is also available.
Cliff Fudge, technical director at H+H, said: “Reducing the weight of our large format blocks has been an objective of our production and R&D teams for some time. We set out to make them easier and safer to handle and manoeuvre around site but were conscious that we did not want to diminish the existing beneficial characteristics of the blocks.
“I am very pleased to say we have accomplished exactly what we set out to do. The blocks are essentially a lighter breed of the exact same product as before. The construction solutions they provide still meet, and in some cases exceed, all of the requirements set out by both Building Regulations and the NHBC in terms of fire ratings and acoustic and thermal performance.”