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CambridgeMart

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  1. The garage doors are 1800mm high, adding 200mm to the slab may cause us a problem with clearance; it's probably a toss up whether we increase the slab height by 200mm and raise the aperture for the door by the same amount, or go with plan 1 and break up the original slab and re-pour it.
  2. Yes, -40C (this is in Northern Finland); we don't believe there's any reinforcement in the slab. Pouring on top of the existing slab sounds attractive, I need to check that the current garage doors height will still be sufficient if we raise the floor level; that may also limit the machine I hire, a 5 tonner is quite high. I suspect that the building contractors are covering their behinds by quoting for a completely new slab so they can be 100% certain of no future issues; I am not worried if a few cracks appear somewhere down the road! Yes, we are (heavily) insulating the barn and installing heating, after all my new man-cave needs to be cosy!
  3. We've bought a new property which has a 10m x 7.5m barn; the barn was originally a cowshed and milking parlour and has a concrete floor which is very uneven, has drainage channels and large holes in it. We will be using the barn as a garage and workshop; it needs the floor relaying and I will be incorporating insulation in the slab as the temperatures get down to -40C in winter! The slab needs breaking up and digging out and a new slab pouring; we have had quotes from local construction firms and the quotes were astronomical, so we plan to do this ourselves. Presumably an excavator with a breaker attachment is the way to go, can anyone suggest how long we should hire it for (I've hired diggers, but never used a breaker attachment before)?
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