Richardk Posted May 11, 2009 Share Posted May 11, 2009 We need to 'fill' a void of c. 3.5cm in height which currently has a concrete base. Upon looking round at forum posts relating to screed thickness people always say minimum 5cm. Further conversations and reading has 'led me to believe that there are two types of screed jobs - bonded and unbonded. Whilst the latter should have 5cm's or so, the former can I believe be much less - even just a couple of cm's for example. Can anyone verify this? Link to comment Share on other sites More sharing options...
BIG MAC Posted May 12, 2009 Share Posted May 12, 2009 Hard to tell what you are asking. If you are saying that you have a depression 3.5 cm in an existing otherwise sound screed and wish to repair it then I would suspect dependent upon traffic that a screed repair would probably be a good bet. http://www.ardex.co.uk/repair_mortars.aspThere will be French equivalents...just don't ask me what they are called! Link to comment Share on other sites More sharing options...
Anton Redman Posted May 12, 2009 Share Posted May 12, 2009 Light the blue touch paper and withdraw. 3.5 cms is too thick for a self leveling screed and too thin from a coat of concrete. What are you planning on putting on top ?. If you are tiling on top suggest wet 3 to 1 mix with glass fibre added and leave at least two weeks to go off. Link to comment Share on other sites More sharing options...
BIG MAC Posted May 13, 2009 Share Posted May 13, 2009 [quote user="Anton Redman"]Light the blue touch paper and withdraw. 3.5 cms is too thick for a self leveling screed and too thin from a coat of concrete. What are you planning on putting on top ?. If you are tiling on top suggest wet 3 to 1 mix with glass fibre added and leave at least two weeks to go off.[/quote] Falls nicely into the Ardex spec or epoxy repair bracket .... Link to comment Share on other sites More sharing options...
Richardk Posted May 13, 2009 Author Share Posted May 13, 2009 What it's acutally for is to raise the level of what will be a terrace by c.3.5cm to match in with an adjoining established terrace. Currently I have a solid, sound area of concrete. Subsequently it will be tiled. Link to comment Share on other sites More sharing options...
BIG MAC Posted May 13, 2009 Share Posted May 13, 2009 You could simply bed some very thick tiles below those you intend to lay or edge shutter and lay an Ardex (or similar generic type) screed Link to comment Share on other sites More sharing options...
AnOther Posted May 14, 2009 Share Posted May 14, 2009 Anybody got any names for floor screed in France ?In UK, years ago admittedly, I levelled a kitchen floor with Febflorand I'd like to chuck something similar on my garage floor which isconcrete with a screed but damaged in places, ultimately it will bepainted with proper heavy duty floor paint. Link to comment Share on other sites More sharing options...
gosub Posted May 14, 2009 Share Posted May 14, 2009 Ragréage autolissantStart here http://www.batiproduitsmaison.com/bpm/FicheProdRecherche2.do?id=1000273184 Link to comment Share on other sites More sharing options...
Araucaria Posted May 14, 2009 Share Posted May 14, 2009 Sorry to elbow my way into someone else's thread, but I've a similar problem but with an external concrete slab. It's on top of a large old rainwater cistern, and directly outside the front door of our barn conversion. The slab is a good six inches thick with colossal (inch thick) reinforcing rods in it. It's about 6 meters long by about 3 meters wide. Sorry about the metric/imperial mix!We'd like to tile it, but it isn't level, and it's also quite important that any rainwater on it should drain away from the door rather than into it. It isn't just that at present it has a slope on it: it undulates quite a lot. Rainwater forms quite a nice pool in the middle. So we can't increase the height of the highest points by more than about half an inch (if the tiles are not to be higher than the doorstep), while the lowest points need about two inches (maybe a bit less) to bring them up to the base of the tiles.Is there a product that will work outside on concrete to level it off and let us tile on top? Link to comment Share on other sites More sharing options...
BIG MAC Posted May 17, 2009 Share Posted May 17, 2009 Dunno about availability of scabblers in France however if grinding high sots required then a multi head scabbler is the tool for the job.Epoxy screeds will not like being laid to falls but can be laid to a minimal thickness. I would suggest epoxy screed to level the slab then set up string lines to establish falls and bed the tiles on conventional outdoor mix adhesive to include the desired fall. Link to comment Share on other sites More sharing options...
Nearly Retired (I am now) Posted May 17, 2009 Share Posted May 17, 2009 I have no idea about availability in France but I have succesfully used this liquid ( it looks a bit like thick milk) in screed mixes.http://www.ronacrete.co.uk/ProductFiles/IS/ronafix.12.mixc.pdfIt allowed me to have a 5mm thick screed with no problems - you can even feather it out down to the size of the sand grains in the mix. You have to wash it off your tools within an hour or half an hour or so - otherwise they have to be binned. Link to comment Share on other sites More sharing options...
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