1. Visiting from the US? Why not try DIYnot.US instead? Click here to continue to DIYnot.US.
    Dismiss Notice

Plywood or Floorboards and insulation

Discussion in 'Floors, Stairs and Lofts' started by bineet, 9 Jun 2021.

  1. bineet

    bineet

    Joined:
    24 Feb 2007
    Messages:
    72
    Thanks Received:
    1
    Location:
    Birmingham
    Country:
    United Kingdom
    Hello
    I was hoping if someone can help / advise?

    I have 1930's house and the floorboards are 5" T&G; I am struggling to find the same size. Someone suggested that I use structural Hardboard Plywood and it can be cut to make joints where I have electrics, gas water pipes running to make it easily accessible should we need to lift it in future.

    I have seen there are a lot of 18mm options for different types available. Can anyone suggest if this is a good idea and it wont bend due to daily traffic in the house?

    Also, currently I do not have any insulation below the floorboards, given the fact that there are electric, gas and radiator pipes running all over beneath the floorboards, is it a good idea to have the insulation (thinking for the fire risk perspective) and if insulation between empty spaces between joists, is it good to have the wool insulation or insulation boards to retain the heat and sound proof the room.

    Many thanks
    LK
     
  2. foxhole

    foxhole

    Joined:
    14 Mar 2006
    Messages:
    17,473
    Thanks Received:
    2,003
    Location:
    Kent
    Country:
    United Kingdom
    Why would you need same size? Just need to be same depth .
     
  3. Sponsored Links
  4. bineet

    bineet

    Joined:
    24 Feb 2007
    Messages:
    72
    Thanks Received:
    1
    Location:
    Birmingham
    Country:
    United Kingdom
    Hi Foxhole, the reason I am looking at the same size so that I do not have to change all the floorboards.

    As I need to change a few floorboards, I thought it would be better if I rip all the floorboards and replace them with 18mm structural hardwood Plywood sheets and make the joints where I have pipes and wires so that whole boards do not have to be lifted in the future.

    I am not too sure about the insulation as there are hot water pipes and wires running beneath the floorboard voids and hence seeking advice.

    Many thanks,
    LK
     
  5. JobAndKnock

    JobAndKnock

    Joined:
    30 Sep 2011
    Messages:
    5,675
    Thanks Received:
    1,263
    Location:
    Lancashire
    Country:
    United Kingdom
    Structural HW ply is suitable for flooring. 18mm is sufficient if your joists are on 16in/400mm centres. In terms of access, if you own a router the Trend Routabout access hatch system is excellent for making neat service accesses

    In terms of sound insulation your best (affordable) bet is probably mineral wool batting.

    Copper pipes are often insulated with a mineral wool sleeve with an outer facing of aluminium foil, so they should be OK with mineral wool

    Electrical junction boxes should not be insulated over and areas above built-in downlighters (where heat build up can occur) should be protected with a purpose made heat cap (they look a bit like an Egyptian fez)
     
    Last edited: 9 Jun 2021
  6. Sponsored Links
Loading...

Share This Page