screed

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Screed has three meanings in building construction:

A flat board (screed board, floating screed) or a purpose-made aluminium tool used to smooth and to "true" materials like concrete, stucco and plaster after they have been placed on a surface or to assist in flattening;
A strip of plaster or wood applied to a surface to act as a guide for a screed tool (screed rail, screed strip, screed batten);
The material itself which has been flattened with a screed (screed coat). In the UK, screed has also come to describe a thin, top layer of material (sand and cement, magnesite or calcium sulphate), poured in situ on top of the structural concrete or insulation, on top of which other finishing materials can be applied, or the structural material can be left bare to achieve a raw effect.

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  1. D

    Ditra mat for 10mm porcelain on new 65mm fibre screed?

    Hi all, apologies if this has been asked before, but couldn't find an example for this situation. Question is do I need to decouple with Ditra mat (or similar) or will it be fine without? Tiles are 10mm thick porcelain. This is in a new extension linking to existing kitchen. The new...
    • Deleted member 51092
    • Thread
    • ditra ditra mat porcelain porcelain tile screed
    • Replies: 4
    • Forum: Australia Tiling Forum
  2. B

    BAL BAL and Gypsum based Screeds

    Have a read of this from BAL https://www.linkedin.com/pulse/solving-anhydrite-problem-philip-jenkins/
  3. jobdone

    Preparation Best way of removing adhesive and flees backing from screed

    I have approx 100m2 over 3 rooms to strip back the old adhesive and fleese backing left by the detria mat. It all has to come up as I need to meet and existing floor in one door way. What would be the best machine to assist me in this task. Many thanks David
  4. D

    Gypsum anhydrate pump screed

    Anybody worked with this screed . What is it like for Laitence good , bad , average . Thanks
  5. R

    Is there a visual difference between the different types of screed

    My new laid screed floor has been down for 4 months and from reading up I probably need to seal it prior to tiling. Unfortunately I cannot get hold of the builder to find out whether it was a cement screed or flow/anhydrite type screed. Is there a visual way to tell (ie color/finish) that would...
  6. B

    Barn conversion, wet UFH and S&C screed.

    Started today, 900x600 limestone job. Customer wants 8mm ish joints so that makes it a bit easier on the eye with the chiseled/tumbled edges. They are undecided on which grout colour, I was leaning towards a grey for these, would like some opinions please. Start laying tomorrow on top of the...
  7. P

    Anhydrite drying times

    Hello all.... quick question. I have a customer who's built a new home. I've tiled the walls and have the floors still to do. They're 50mm anhydrite incorporating piped underfloor heating. The floor was poured in December and heating has been on for a few weeks now. However, I put down my...
  8. Adam18Spring

    Wet room, cement on top of Anhydrite screed

    Hi guys Long time reader and lurker, got so much great advice... Quick question, i have a Anhydrite screed currently that was put down in a wet room (Wet UFH 50mm thick) it is currently 50mm lower than the finished floor height needs to be. My question is, would it be the following buildup be...
  9. A

    4 Year Old Gyvlon (anhydrite) preparation advice

    We had Lafarge gyvlon screed laid 4 years ago and are only now in a position to get it tiled. Up to now it was covered with temporary carpet. As far as I can remember nothing has been done in prep (I know we should have removed the laitance a couple weeks after laying, but to be fair it looked...
    • Algy
    • Thread
    • adhesive advice anhydrite canada old preparation screed
    • Replies: 17
    • Forum: Canada Tile Advice
  10. S

    Which UFH Screed (Thin)

    All Please could you advise which is the best thin screed to go with for UFH? I know it will be a liquid of some sorts and I presume 40mm is minimum I can get away with? I will be tiling on top. Im trying to maximise the amount of insulation I can get underneath a Block and Beam floor with...
  11. Miles

    Devi mat and renovation screed.

    Hi, I have had an electrician fit cement board and a Devi underfloor heating mat (150) and the floor was way out on one side so I have put some renovation screed over about half of it, i'd say its around 30mm at its thickest, how will this effect heat? As in, heat up times, cool down times...
  12. C

    UFH Screeder in Sunderland/North East

    Hi, I am looking for an UFH screeder in sunderland that know what they are doing. Any recommendations? Will be Porcelanosa Acero tiles going down on top. Recommended tiler also welcome. 107m2 @ approx 65mm. Thanks.
  13. D

    Fast drying screeds .?

    Has anybody come across retanol xtreme . Went to have a look at a job last week . Capable of tiling after 4 days . My worry although maybe hard enough I would of thought their is still a lot of moisture .
  14. F

    Cemfloor liquid screed with heating

    I thought I would put this on as these screeds are becoming increasingly popular and there seems to be incorrect advice been given by the screeders. Pumped in, rapid drying cement based screed with underfloor heating which they claim you can tile on directly after 7 days and you don’t need to...
  15. C

    Cracks in screed, how to repair?

    Hi I’ve just removed a stone floor for a client. I didn’t tile it originally. The stone tiles had 3 sizeable cracks in it and the floor has a wet ufh system. We couldn’t work out why the tiles had cracked apart from guessing that it was due to cracks in the screed below and not using a...
    • clipboard2008
    • Thread
    • canada crack cracking cracks debonding how repair screed
    • Replies: 2
    • Forum: Canada Tile Advice
  16. L

    Existing floating floor and new ufh screed dilemma

    A new ufh screed is going to be laid in an extension. The existing flooring is a floating floor with plenty of 'bounce'. Customer would like both floors tiled. Old floor is approx 70m2 and the new screed is approx 30m2. Is it possible to do this as I don't think cost is an issue? Lewie
  17. C

    Screed crack UFH - is there a problem?

    Hello all. I was hoping for some help with UFH issue. There seems to be many posts with similar issues but no answer fits all. I have had builders round to do a lot of work at my house. Part of it was digging out the floor and laying a wet UFH system. The room is approx 34sqM Damp proof...
    • Coopobot
    • Thread
    • canada crack cracking debonding problem screed there ufh
    • Replies: 4
    • Forum: Canada Tile Advice
  18. Balloo

    Cement based liquid screed

    Has anyone worked with cement based liquid screed im not talking about calcium hydrate form , Ive been told they may need to be sanded ?
  19. M

    UFH, Drying times and Rapid setting screed

    hi all I’m hoping for some technical advice on screeds and commissioning wet underfloor heating. I went to look at at 40m2 of floor tiling job yesterday the customers would like the floor tiled before the 22nd of next month as the kitchen is being fitted then. The wet underfloor heating system...
    • Matthew77
    • Thread
    • canada dry drying rapid screed setting ufh
    • Replies: 14
    • Forum: Canada Tile Advice
  20. R

    Wet UFH to screed or not to screed ?

    I want to get a wet UFH installed in my house ( just over the ground floor) - which now has concrete floor and laminate flooring. No extension or anything, just retrofitting wet UFH ( hate my radiators!) 1 - Which UFH to go for ? with screed or without screed, and what difference does it make ...

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