Hire the best Bricklayer

Insulating an old house..

Results 1 to 11 of 11
  1. #1
    Apprentice (new member)
    Join Date
    Aug 2020
    Location
    Melbourne
    Posts
    6

    Default Insulating an old house..

    I have a question regarding insulating an old weatherboard house that faces East North East, backs into a hill (no to very little western sun) and has tree shade on both Northern and Southern sides.
    Iím looking at replacing the weather boards with Axon cement sheet and insulating. The double hung sash windows will be kept for now. (Replaced at later date)
    Whatís my best option for walls, floor and roof. I have good access to all areas. Iím happy to batten out, double insulate, whatever it takes!! Also happy to be directed somewhere.
    Thanks in advance
    Russ

  2. #2
    3K Club Member johnc's Avatar
    Join Date
    Jul 2004
    Location
    Sale
    Age
    65
    Posts
    3,888

    Default

    If removing the weatherboards put batts in the walls, put up builders wrap then put on the new cladding

  3. #3
    Apprentice (new member)
    Join Date
    Aug 2020
    Location
    Melbourne
    Posts
    6

    Default

    I read in another thread of someone who used batts, then brace ply then 6.5 mm wrap then battens then the cladding. I really want to insulate as well as possible. Is there a best practice?
    Batts and blanket in the ceiling?
    Batts and ?? Under the floorboards?

  4. #4
    4K Club Member
    Join Date
    Nov 2009
    Location
    Geelong
    Posts
    6,039

    Default

    We used a combination. Fibre batts in the walls and ceiling but some small areas had a double layer of Foilboard and an airgap.
    We did sheath the house in ply but that was mainly to get it back to lock-up ASAP. We then did RFL wrap, batten out and clad with corrugated steel with a second layer of RFL. More to keep out the summer suns heat tho and if you are mainly shaded from the Western sun I don't think you would need to go that far. Roof has R2.5Anticon and R3.6 batts on the ceiling
    "A big boy did it and ran away"

    Legal disclaimer denying responsibility to be inserted here.

  5. #5
    Apprentice (new member)
    Join Date
    Aug 2020
    Location
    Melbourne
    Posts
    6

    Default

    Leaving out the brace ply youíve used batts in the wall, followed by foil wrap followed by battens, more wrap then the cladding??

  6. #6
    4K Club Member
    Join Date
    Nov 2009
    Location
    Geelong
    Posts
    6,039

    Default

    Yes a double layer of RFL with an airgap between them. If we were doing it again and were cashed up we would use 20mm Foilboard tho.
    We just did the last wall and used foilboard rather than Sisalation and it is far more effective.
    "A big boy did it and ran away"

    Legal disclaimer denying responsibility to be inserted here.

  7. #7
    Apprentice (new member)
    Join Date
    Aug 2020
    Location
    Melbourne
    Posts
    6

    Default

    So would I use batts between the studs then 20mm foil board then battens then foil wrap and then the cladding?

  8. #8
    4K Club Member
    Join Date
    Nov 2009
    Location
    Geelong
    Posts
    6,039

    Default

    Batts between the studs, then RFL housewrap, then battens and cladding. Adding the Foilboard on top of the battens only if funds available and insolation due to aspect was a problem or you really wanted to maximise R-value in the walls
    "A big boy did it and ran away"

    Legal disclaimer denying responsibility to be inserted here.

  9. #9
    Apprentice (new member)
    Join Date
    Aug 2020
    Location
    Melbourne
    Posts
    6

    Default

    Iím really trying to maximise keeping the house temp as stable as possible without heavy power use. So foilboard straight behind cladding? I did see someone had wrapped their home in a 6.5mm foam wrap? Is that something you know about? Am I wasting time and money considering I have single glazed sash windows? I have repaired them and greatly reduced draughts and we intend to use a heavy backed curtain.
    Thanks in advance for your information

  10. #10
    4K Club Member
    Join Date
    Nov 2009
    Location
    Geelong
    Posts
    6,039

    Default

    Do everything else first Double glazed windows if possible [ lots of dollars but worth it] sealing all leaks etc; before going the extra yards with the cladding. It's hard to keep a lightweight house temperature stable, that takes a lot of mass to store the energy, probably several hundred tonnes of it as in earth berming etc.
    What's your heating/ cooling??
    "A big boy did it and ran away"

    Legal disclaimer denying responsibility to be inserted here.

  11. #11
    4K Club Member
    Join Date
    Nov 2009
    Location
    Geelong
    Posts
    6,039

    Default

    Question should be moved to the Heating and Cooling section.
    More expert people here than I am and you may get a better answer in the right place.
    "A big boy did it and ran away"

    Legal disclaimer denying responsibility to be inserted here.

Similar Threads

  1. Insulating Weatherboard House // Melbourne
    By MecAut in forum Cladding
    Replies: 9
    Last Post: 5th Feb 2019, 02:48 PM
  2. re-insulating
    By bangon61 in forum Kitchens
    Replies: 5
    Last Post: 21st Feb 2013, 11:21 AM
  3. Insulating a Double brick house in Tassie
    By 2days in forum Heating & Cooling
    Replies: 1
    Last Post: 20th Aug 2011, 03:25 PM
  4. Kia Ora ( Insulating a Fibro House )
    By afshin in forum Introduce Yourself
    Replies: 0
    Last Post: 14th May 2011, 06:24 PM
  5. Dummy's guide to insulating a QLDer house?
    By FHO in forum Heating & Cooling
    Replies: 10
    Last Post: 26th Jun 2010, 09:09 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •