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Thread: loft u value ??? what does it mean

  1. #1

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    Default Unanswered: loft u value ??? what does it mean

    I did a calculator of what my loft has.. and i grt a 0.63 u rating.
    My loft is 12msquared or roof area 21msquared

    I cant figure out or find a calculator that tells me anything i wana know...
    I wantbto figure out if my tent is in that room if 0.63u insulation is enough to maintain temps

    Eg i draw air from my house but in winter when its -2 and summer 40 in my loft .
    I have insulated with rockwool and plasterboards to a thermal rating of 0.63
    What temp will it be in my loft in winter and summer

    Wana work this out tonsee how stable it will be and what i need to do to make it perfect if i cant cope still

  2. The Following 3 Users Say Thank You to DrGreen For This Useful Post:

    CityDweller (13-02-20), hotshot (13-02-20), Wags (13-02-20)

  3. #2

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    Default

    I have never been able to figure this out. I find it easier to monitor and adjust as the grow goes along.

  4. The Following User Says Thank You to CityDweller For This Useful Post:

    hotshot (13-02-20)

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