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Discuss Tiles cracking On conservatory floor in the Underfloor Heating Forum area at TilersForums.co.uk.

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  1. Jimcub

    Jimcub Active Member

    Location:
    Cheshire
    i have a conservatory floor which is 33 sq mts in a L shape
    It had a level screed over the pipes and was. very flat as laid with a laser, backed up by tiler who said it was within 1mm all over.

    I used a proffesional tiler and was laid with mapei? Both tile and grout cement.
    The floor was laid in 2017 and after a year the tiles started cracking by both doors, a double set each end.
    Then last end of 2018 we got a couple of cracks in the middle across about 4 tiles.
    There’s no difference in height or it’s less than 1mm, it’s like the surface has cracked so I don’t know if it’s expansion or heave.
     
  2. Andy Allen

    Andy Allen Metro specialist & forum entertainer! Trusted Advisor Professional Tiler JOTM Winner

    Location:
    Gloucester
    Was the UFH turned on and bought up to temperature before the tiling...
     
  3. Jimcub

    Jimcub Active Member

    Location:
    Cheshire
    Every thing was done by the book reguarding commissioning and materials, I kept the stated pressure during screening as I had my own pressure tester.
    It is on constant during the winter at 21 dog and turned off in the summer, the conservatory gets sun morning and noon and in between it gets some sun
     
  4. Jimcub

    Jimcub Active Member

    Location:
    Cheshire
    The cracks by the door were after 12 months the other 2 nearer the middle appeared after last summer.
    It’s been down 3 years
     
  5. Localtiler

    Localtiler Trusted Advisor Professional Tiler JOTM Winner

    Location:
    Yorkshire
    Any photos and are the tiles loose or just cracks ?
     
  6. JulianSidney

    JulianSidney Billy no mates. Trusted Advisor Professional Tiler Top Contributor

    what are the tiles?
     
  7. CJ

    CJ Professional Tiler

    Location:
    Somerset
    How thick was the screed? And what was that screed on?
     
  8. Jimcub

    Jimcub Active Member

    Location:
    Cheshire
    FC162B20-53DB-4629-BBC1-69E6F8BBA41D.jpeg BC6D114C-7C0C-43A9-9F77-A00DA30B90DF.jpeg 7538C94A-76C2-46F7-9530-91EC46F6877F.jpeg
    Floor is 4” polystyreneslabs pipes laid on top, screed I can’t remember but was the standard required for that type of floor. 07DD712C-86B6-49A5-B62A-622B93423A1B.jpeg
     
  9. Jimcub

    Jimcub Active Member

    Location:
    Cheshire
    I have plenty of spares to replace them
     
  10. widler

    widler Professional Tiler

    Location:
    England
    Looks to me like your screed has settled
     
  11. Tom Astley

    Tom Astley Trusted Advisor Professional Tiler

    Location:
    Manchester
    look like BCT to me.... or something similar
     
    • Like Like x 1
    • Agree Agree x 1
  12. Jimcub

    Jimcub Active Member

    Location:
    Cheshire
    BCT ?
     
  13. Tom Astley

    Tom Astley Trusted Advisor Professional Tiler

    Location:
    Manchester
    The tiles look like they were made by British Ceramic Tile and are not suitable for floors, especially heated ones.

    Although the boxes had 'Floor & Wall tiles' on them, didn't mean they were good enough.

    BCT have recently gone out of business.
     
    • Like Like x 1
  14. Jimcub

    Jimcub Active Member

    Location:
    Cheshire
  15. Tom Astley

    Tom Astley Trusted Advisor Professional Tiler

    Location:
    Manchester
    Same thing Jim .... can you show us a photo of a box and the back of a tile that hasn't been fixed, please?
     
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