Blown fibre is fibreglass insulation, similar to roll fibre and can be blown into the attic space. It is ideal for fitting into awkward corners or obstructions in the loft space. They also make the job easier if the joist spacing’s are irregular or not suitable for a standard width of matting. This material generally has the same insulation value as rolls of fibre insulation and should have a minimum finished thickness of 300mm (12in) which Apollo Construction and Insulation can apply to your home as a heat solution.