Aggregate Industries is urging housebuilders to look more closely at the technical considerations before installing block and beam flooring, as the 1 January 2018, deadline for the National House Building Council’s (NHBC) Technical Extra 20 standard draws closer.
Originally announced last year, the new standard states that when installing a block and beam type system, the use of micro fibres, as an alternative to steel mesh reinforcement, is now no longer acceptable to the NHBC.
Instead, approved macro structural fibres or steel fibres are deemed acceptable for use as reinforcement. According to the guidance, structural toppings on insulating block and beam systems requiring approval by the NHBC must use one of the following reinforcement options; macro ‘structural’ synthetic fibres, steel fibres or steel mesh reinforcement.
Chris Hudson, Managing Director for Asphalt and Readymix at Aggregate Industries, said: “There is no doubt that the methods used to construct new floors have come on in leaps and bounds in the last decade. However, block and beam floors, still remain the most popular solution for housebuilders when building a ground floor – and so it’s important that they are in-tune with the latest guidelines.
“In order to stay ahead of the game and iron out teething problems, housebuilders should already be well underway in adopting these changes. However, there are a number of considerations that must be taken into account – and housebuilders must be aware of the implications – which is where starting conversations early doors with suppliers will come in handy.”
Chris gives his top tips for housebuilders when selecting concrete for block and beam flooring:
For more information on Aggregate Industries’ NHBC Guidance Notes, call 01283 714402.