Currently in the process of designing / drawing plans for an L shaped extension to a Bungalow. Current building is basically a box, new build will be extension rewards and to the side to give me a new large lounge and bigger 'attached' domestic garage/workshop. The new garage floor level will be set to meet an existing pre-fab workshop floor, whereas the floor for the new lounge will obviously be the same as the existing domestic rooms. The difference is around 100mm (new garage floor lower), so this should also meet building regs. When I come to spec the construction for BC I'm happy with the new lounge floor with regard to insulation etc, but it’s the new garage floor I'm unsure about. I would like the finished floor to be at least a 150mm slab with reinforcement in order to take the load of machinery (milling machine, lathe, two post lift, etc) and a car.
Although I will probably heat it by some external means (i.e. not part of the central heating), I’m not sure if I need or will have to have any under floor insulation? If I do, could someone give me an idea of type/thickness that would be necessary to support the slab above? I also have in mind that if I go with no insulation, and later decide that in order to sell the house I should convert some of this garage space to accommodation, I can add insulation and floating floor in the 100mm space mentioned above... hope this makes sense!
Thanks in advance.
Although I will probably heat it by some external means (i.e. not part of the central heating), I’m not sure if I need or will have to have any under floor insulation? If I do, could someone give me an idea of type/thickness that would be necessary to support the slab above? I also have in mind that if I go with no insulation, and later decide that in order to sell the house I should convert some of this garage space to accommodation, I can add insulation and floating floor in the 100mm space mentioned above... hope this makes sense!
Thanks in advance.