hairline cracks in new plaster

Discussion in 'Builders' Talk' started by surge, Mar 21, 2007.

  1. surge

    surge New Member

    After skimming, now and again the odd hairline crack will appear onces it has dried out. I always cover the existing cracks with skrim. What is the cause of this and how is it avoided? thanks
  2. Mr. Handyandy

    Mr. Handyandy Screwfix Select

    How do you prepare the wall before skimming ?

    Say how, and the 'experts' on here will give you some clues.




    Mr. HandyAndy - really
  3. fooman

    fooman New Member

    How do you prepare the wall before skimming ?

    > Say how, and the 'experts' on here will give you some




    Mr. HandyAndy - really

    you included no doubt :^O
  4. chippie244

    chippie244 Well-Known Member

    Here we go again. Can't you play nicely, children?
  5. surge

    surge New Member

    I tape up any existing cracks, then 2 coats of diluted pva
  6. deacon

    deacon New Member

    I am here , answered something like this before ,pva or water ,---------------------------------------------------------------------------fruit juice ,orange juice, carrot juice ,grapefruit juice ,apple juice , thats you shopping, oh yeah , sorry
  7. newey

    newey New Member

    From your OP i can assume you mean re-skim. Why else would you be taping the cracks. IMO i think you ahve one of two problems. Firstly, have you used PVA to seal the wall and if so was it strong enough? Secondly, are you plastering on stud walls? Perhaps the plaster board has not been fixed correctly and is moving under pressure.
  8. little_joe

    little_joe New Member

    Are you putting it on too thick ?

    Have you tried adding a pinch of fibre bind, supposed to stop top coats from cracking.
  9. newey

    newey New Member

    Another issue could be drying out the plaster too quick. Don't allow the room to be too warm when drying. Allow plenty of ventilation but no direct heat. Turn down rads to keep the room warm, not hot.
  10. Mr. Handyandy

    Mr. Handyandy Screwfix Select

    Do you skim while pva is still tacky ?

    If not, you could try that.



    Mr. HandyAndy - really
  11. newey

    newey New Member

    Who oh why does the OP ask a Q then we never hear from them again?
  12. Mr. Handyandy

    Mr. Handyandy Screwfix Select

    surge

    Posts: 10
    Registered: Mar 14, 2007
    Re: hairline cracks in new plaster
    Posted: Mar 21, 2007 10:09 PM Reply


    I tape up any existing cracks, then 2 coats of diluted pva
  13. newey

    newey New Member

    clever cloggs, i stand corrected
  14. Martin99

    Martin99 Member

    I get this in old houses after a season or two. I guess lime plaster has alot going for it if you have to time and money

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