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    External concrete slab...

    Have a small concrete slab with quite a lot of cracks in. Has any one used flexbone out doors or know if its suitable or any suggestions for uncoupling.
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    Wet concrete tiling in old house - help!!

    Flexbone on this one all day long
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    Working out levels.. Anhydrite screed, mat, adhesive, porcelain tile

    If you use a 10mm notch trowel the adhesive will press down to about 3 or 4mm as it fills the dimples in the matting. Not sure if the minimum depth is less but the tech department of the selected adhesive manufacturers will be able to confirm
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    Working out levels.. Anhydrite screed, mat, adhesive, porcelain tile

    You may be right. All members, including said member if he wants, are more than welcome to call me to discuss how to deal with anhydrite especially if they have difficult sites, bad experiences or simply don’t know enough about it. As you know Dave, without wishing to be immodest, I know a fair...
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    Working out levels.. Anhydrite screed, mat, adhesive, porcelain tile

    I assume he’s either had an issue which he never understood or resolved or he is badly misinformed. To give you some idea of how suitable anhydrite is for tiling (not that you need it but it benefits others perhaps) we did a survey a couple of years ago and we reckon around 1million or so square...
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    Working out levels.. Anhydrite screed, mat, adhesive, porcelain tile

    Your spec looks generally fine. In terms of sanding or mechanical abrasion you need to basically remove anything loose and friable and make the screed surface absorbent so the primer can soak in and thus hang on. Typically this needs only to be microns assuming the screed has no defects. The...
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    tiles not sticking to wall

    Have you primed it? It looks like its pretty dry
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    Help! Have to prove fire resistance to Building Control

    Get a qualified fire surveyor to look at it and write a report based on existing. Building control are paranoid about fire post grenfel. I wouldn’t criticise this attitude as it’s better safe than sorry but they often try to portray themselves as all knowing but are often really not very...
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    Very large format porcelain, partial anhydrate screed UFH

    You have a physical break between the two substrates which should reflect through the time face. This constitutes a movement joint. Ditra is to stabilise unstable screeds and should not be used to bridge movement joints. If you do the differential movement both horizontal and vertical will...
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    Anhydrite screed prep

    To use “traditional” prep methods The surface needs to be clean sound and absorbent. As the surface is currently solid it is definitely sound. Clean … well that’s fairly straight forward… A simple test for the level of absorbance is the water drop test. Get a few drops of water (you could use...
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    Levelling floor between heated/decoupled areas and those without?

    Why not decouple the lot?
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    Cowboys entering into Tiling due to Covid

    Covid and other market forces have put serious pressure on people’s livelihoods . People have also reevaluated what is important to them. That means that lots of folks have diversified their skill sets. Tiling is relatively easy to enter as a trade so it’s in ideal job for newbies and career...
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    What's wrong with these pictures??

    Looks fine apart from the rubbish tiling
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    Floor tiling on screed with no visible cracks

    Have you got pics. You need to identify what it is really before folus can advise properly.
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    Tiles heats up when laid over Bitumen paint!

    :) the hydration if cement is strongly exothermic. I would guess the adhesive is made with pretty much brand new cement and hasnt been sat in the bag for long. This would lead ut yo being hotter than usual as it sets. There is no reaction between bitumen and cement that I know of.
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    Anyone had experience with pre-routed 22mm chipboard for wet UFH

    spreader plates are generally pretty inefficient as they have little mass. They tend to need higher temperature input making them not very energy efficient either. A screed or dense conductive board will always be better.
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    Anyone had experience with pre-routed 22mm chipboard for wet UFH

    is this for a primary heat source or just to warm up the tiles and make it more comfy.
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    Tiling onto calcium based screed

    ditra would cope. I would not necessarily trust the hygrometer reading this time of year simply because the temperatures overnight tend to lead to interstitial condensation issues which throws the readings off.
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    Tiling onto calcium based screed

    if the crack mat is a moisture stabiliser like ditra youll be fine togo ahead. For info the floor should be 80% to be considered dry but there is an error built into the test regime so has a tolerance of minus 5% hence 75%. for equilibrium you should have two consecurive readings the same 4...
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    Does grout expire

    This thread is 12 years old. I bought new grout, changed jobs, broke my ankle, had 3 operations to fix it, moved house, bought 2 new cars and started a new side career sinde then...

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