The floor levels need to be raised considerably and as we are opting for underfloor heating (supplier not choosn yet). We have choosen insulation over slab. The building regs have specified 75mm but we are going to use 100mm insulation. Insead of using a primary limestone aggregate we are opting for a slate sub base ( classed as recycled and eco friendly) and have had our 1st 30tonne delivered by Loweroak aggregates.
