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Hardwall Backing

Discussion in 'DIY Plastering - Plastering Help - DIY Plastering ' started by drew wiley, Feb 13, 2018.

  1. drew wiley

    drew wiley New Member

    Hi, a novice here and i have such a small job most plasterers wont even come to look.

    Recently moved into an old renovated barn, all internal walls are celcon/thermlite blocks and some bright spark decided to chase and backfill hot and cold water pipes into the walls.

    I have a 30mm deep, 200mm wide and 6ft long wobbly channel running down my walls. I want to fill and reskim ready for decorating. I have spoken to gypsum who were useless, so im after some advice

    1) Is hardwall the best plaster to build up the depth before skimming?
    2) do i need to build up using 2 or 3 layers and if so how long between next layer
    3) do i need to use pva solution or gypprime before the hardwall to help reduce drying?
    4) i was thinking of using some expanded aluminum mesh in the hole to give a bit of strength is this a good idea?
    5) Once the backing plaster is in i may not be able to skim it straight after as i work away. It may be left a week before i get to skim, do i need to do any prep to the backing before i skim?
     
    Last edited: Feb 13, 2018
  2. Tinytom

    Tinytom Active Member

    Buy an expanding foam gun, turn it upto maximum then amuse yourself by seeing how far away you can stand while firing into said channel, they really are quite powerful I’d say a good 8 foot away from the wall.
    After the expanding foam has expanded and set, file it back with a b*****d file and paint directly onto the now bastardised foam.
    Alternatively you could pva, hardwall then skim before it’s gone totally off.
    Your welcome
     
    • Funny Funny x 1
  3. drew wiley

    drew wiley New Member

    Umm not sure if that’s helpful or not. I think I’d rather do things right rather than adding to the bodges already there.
    Your welcome
     
    • Agree Agree x 1
  4. zombie

    zombie Private Member

    Is there enough depth to accommodate a thin strip of plasterboard over the channel?

    If so stick a piece over and bridge the pipes to avoid cracking due to the warm pipe etc.
     
    • Like Like x 1
  5. drew wiley

    drew wiley New Member

    Pipes have now been removed
     
  6. Olican

    Olican Private Member

    Where are you based, would take decent plasterer no time at all
     
    • Agree Agree x 1
  7. drew wiley

    drew wiley New Member

    Norwich, I think I’m more than capable just want to know the best approach.
     
  8. Lodan

    Lodan Private Member

    Just fill it with hardwall and pva the hardwall if you have to leave it a few days
     
  9. zombie

    zombie Private Member

    In that case go to wickes buy a bag of 1 coat plaster read the instructions on bag and fill your boots!
     
  10. drew wiley

    drew wiley New Member

    Very useful, I don’t suppose you have the instructions knocking around.

    About as useful as not replying
     
  11. Nisus

    Nisus Elite Member

    That would explain the username then :sisi:
     
    • Funny Funny x 2
  12. drew wiley

    drew wiley New Member

    Wow, this really shows a high level of intellect. I guess based on your name that you have purple hair?
     
  13. essexandy

    essexandy Private Member

    You've asked a question, been given a good answer and yet you're still not happy.
    In the trade this is known as the ''f**k off you ungrateful b*****d" moment.
    At this point the instructions are, f**k off and find your answer elsewhere.
     
    • Agree Agree x 2
    • Funny Funny x 2
  14. drew wiley

    drew wiley New Member

    Sorry which was the correct answer?
     
  15. drew wiley

    drew wiley New Member

    I spotted 3 Andy, which would you use. I’m here for advice nothing more. Why be so aggressive
     
  16. essexandy

    essexandy Private Member

    All of them barring the obvious foam gun joke.
    Zombie gave you a very good answer and your response was at best daft, at worst darn right bloody rude.
    You have come on a trade forum and had replies from tradesmen at no charge, you should consider yourself very lucky.
     
    • Like Like x 1
  17. drew wiley

    drew wiley New Member

    Thankyou Andy, I’ll go down that route, excellent service.
     
    • Like Like x 1
  18. essexandy

    essexandy Private Member

    Just to be clear, Zombie didn't mean for you to literally "fill your boots".
     
  19. Lodan

    Lodan Private Member

    Lol, he's got to go and was the hardwall off his feet now
     
  20. drew wiley

    drew wiley New Member

    hahhahahaha classic
     
  21. theclemo

    theclemo Private Member

    Danny gets paid tho :LOL:
     
    • Funny Funny x 1
  22. Tinytom

    Tinytom Active Member

    About as classic as someone who’s “more than capable” but has to ask how to patch up a chase. Good luck bet it looks dog shite when you paint it.
     
  23. drew wiley

    drew wiley New Member

    Paint took to that foam like a treat.
     
    • Like Like x 1
    • Funny Funny x 1
  24. essexandy

    essexandy Private Member

    Yeah but when was the last time that he gave any decent advice?
     
    • Funny Funny x 2
  25. Danny

    Danny TPF OWNER

    I dont know where to start :D
     

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