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Lowering ceiling

Discussion in 'General DIY' started by Mechanical Mike, 12 Jun 2018.

  1. Mechanical Mike

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    Location:
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    Front bedroom of my victorian semi is
    A)Very cold
    B)And has old lath and plaster ceiling and old cracked coving..

    I don't want to take ceiling down because of the mess but thinking about lowering the ceiling. Room is 11 foot tall and so hard to heat with rads.

    So was thinking of taking off original coving and fitting joists below current ceiling and fitting 100mm of celotex between new joists, re plasterboarding and fitting new coving etc. Any thoughts on how to secure joists to wall and depth of joists? Room is 4m by 5.5m in plan.
     
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  2. RichA

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    Can you not just plaster board under /attached to the existing with insulated board.
     
  3. Mechanical Mike

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    I could but not sure what mass I can add to existing joists and whether I could adequate insulation ?
     
  4. foxhole

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    Run a 6x1 across centre (4m width) then run 3x1 (or 4x1)from that to wall plates. Wall plates can be secured to walls with large screws depending on wall structure.
    Will keep cost down .
     
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  5. Mechanical Mike

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    Thanks foxhole, just to clarify
    wallplates are timber as well?
    And the 3x 1s would be approx 2.75 long? At 90 degrees to, and either side of a central 6x1 joist 4m long. How far would you recommend spaceing them apart along the 4m?
     
  6. foxhole

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    Correct, 400mm centres.Also central noggins on the 3x1.
     
  7. phatboy

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    If you lower the ceiling by enough, just use 300mm of Rockwool as insulation, it will be a lot cheaper!

    Cut a hatch in the above ceiling so you can get down to the new one if you ever need to.
     
  8. JobAndKnock

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    To my mind a better (and lighter) solution than timber framing would be to use metal framing (see the Gyproc Casoline page as one example) on either 400mm or 600mm centres (depending on board size, etc) and boarded with 12mm grey board. The "mains" (C-sections) sit on angle plates at the perimeter and are supported in the middle using angle section fixed to the existing joists. "Top hats" are clipped or screwed onto the "mains" and the boards are fixed to them. Faster to install than timber framing and much more versatile IMHO. Even places like Selco sell these systems nowadays
     
  9. foxhole

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    But would require hacking into existing ceiling which he wants to avoid.
     
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