H+H Celcon Solar Aerated Concrete Block 2.9N is only available from us in the one size of 440 x 215 x 100mm. This highly This highly efficient block (thermal conductivity of just 0.11 W/mK) is sufficiently loadbearing for two storey buildings and can be used below DPC. Grade has a compressive strength of 2.9N/mm2 and is principally used where enhanced thermal performance is required. These blocks have superior thermal conductivity and provide a cost effective solution to energy conservation. They are extremely versatile and can be used in a number of situations. They can be used for internal and external cavity walls, solid walls, flanking walls below DPC and partitions. Do not require any additional insulation material with a fire rating of Class A3. For a higher strength concrete block to use in building foundations, see Celcon Hi-7 Aerated Concrete Block 7.3N. Call our team on 01628 674910 for any more information or guidance. PLEASE NOTE: The image is for representative purposes only, if unsure please order a sample Due to the Covid-19 pandemic, brick manufacturers have seen a surge in demand which has led to stock shortages and extended lead times. The price set against the product is based on them being in stock and delivered out of selected depots. We will always try to make sure that our customers' orders are fulfilled, but in the event we cannot supply the bricks within our selected network we will offer an alternative solution where possible.