Glue not bonding to a sanded screed

Discussion in 'Subfloor Preparation' started by Marcus, Mar 22, 2023.

  1. Marcus

    Marcus New Member

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    Hi guys .

    Newbie here with 1st post.

    Had an issue yesterday. Screeded a floor last week with tradeflow.

    Had to sand it to get a smooth finish
    They left heating on so dried too fast to roller flat enough.

    Then came to fitting full stick LVT had to adjust a few planks and it started removing the glue from the floor.never had this issue before. Hoovered to floor to an inch of its life..

    Any advice to stop this happening
     
  2. Rugmunching

    Rugmunching Well-Known Member

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    Did you vac it after it was sanded or a sweep?

    Did you add any water to the mix?

    Some screeds are like that I've found and few of them I've had to prime before adhesive due to how chalky it was.
     
  3. Rugmunching

    Rugmunching Well-Known Member

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    300hd I've found can be like this so stopped using it and the mapei trade for these reasons.
     
  4. Marcus

    Marcus New Member

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    It was vacuumed , the areas that wasn't sanded were fine.. worth some sort of primer before spreading glue
     
  5. Rugmunching

    Rugmunching Well-Known Member

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    Usually the case when you open it up, some screeds stay a little chalky.
    I'd give a 1 part primer to 4 part water and let it completely dry
     

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