liquid screed is very shallow

Discussion in 'Building' started by Zehroni, 9 May 2021.

  1. Zehroni

    Zehroni

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    the liquid screed provided by UK liquid screed LTD is very shallow. it was installed on Friday and was told not to check for at least 48 hours. however when I had a look today I noticed the under floor heating pipes of my sitting room are showing in nearly 2 third of the area., see attached pics. I contacted the company now and hope to hear from them. I am rather worries as the building reg inspectors will inspect the floor this Friday. my question is what is the remedy for such a case so that I know what to expect from the UK liquid screed LTD.
     

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  3. Mr Chibs

    Mr Chibs

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    How thick were you expecting it to be?

    FYI, I had 65mm squirted in and it didn't have any bubbles where the pipe coils are, I also used trays though, not clipped straight on.

    If you are under I would think you could add another layer, but the screed guys will know more.
     
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  4. jeds

    jeds

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    30mm seems thin to me. I'm not aware that there is a 'regulation' thickness but it obviously has to be suitable and functional. In these cases you would have to go with manufacturer's specification - for both the underfloor and the screed. Starting point for me is find out the product manufacturers and look up their specifications? I do have a recollection of a 35mm screed on a job a year or two ago - so it's not a million miles out.

    As for solution - you could add a latex finish over.
     
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  5. 23vc

    23vc

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    I thought the whole point of pumped liquid screed is it can go much thinner than sand and cement.
    Doubt the building inspector will be interested in the screed
     
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  6. jeds

    jeds

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    Not really, cs bonded screed can be as little as 20-25mm. The advantage of liquid screed is in the placing and finish and that it is particularly suitable for underfloor heating applications because it encompasses the pipes more efficiently than cs screed. The question here is if 30mm is sufficient for the heating function?
     
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  8. Zehroni

    Zehroni

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    many thanks for your in put guys. UK liquid screed has come back to me and they re assured me that they have at least 40mm in that area. the also said that the screed they provided can work even at 20mm. most importantly they took full responsibility to handle any complains from the building controller. based on this I am satisfied pending the building reg inspector visit.
     
  9. catlad

    catlad

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    What are you planning to finish your floor with?
     
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  10. Zehroni

    Zehroni

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    porcelain floor tiles 10 mm in thickness with 10mm tiles adhesive
     
  11. noseall

    noseall

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    Surely the liquid screed is poured to a finished level, upon the client's instructions? I.e. not based upon "oh you've had your 40mm and now we are leaving even though it does not come up to the existing levels..."

    Or am I missing summat?
     
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  12. Zehroni

    Zehroni

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    the recommended thickness is 50mm by the provider. all the client can do is follow the provider instructions to prepare the floor as level as they can and leave it to the provider to laser it up and screed. this is what they are paid to do and they are the expert not the client. however, past experience shows the thickness of the screed vary between 20-50mm depending on the finishing surfaces that have been datum to an existing point such as the stair case. furthermore, the client quoted for 2.1 cubic meters and the provider poured 2.2 cubic meter to level up the whole floor.
     
  13. DIYnot Local

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