joidevie Posted April 30, 2011 Share Posted April 30, 2011 Hi..A while ago I posted a question about rendering a damp wall and received many helpful responses..The wall is now rendered & dry (and staying dry and/or breathing happily) by using plain chalk and sand only. Very happy.It's now time to decorate, and we will be using lime wash (badigeon), but I want to smooth the wall a bit before applying the paint. My question is, is either plaster (Lutece 2000) or a placo join filler 'breathable'? Will I be undoing all the good work done using the chalk render? Problems on the horizon or should the wall remain happy?Many thanks for any insights on this.. Link to comment Share on other sites More sharing options...
pachapapa Posted April 30, 2011 Share Posted April 30, 2011 Plaster is basically a sulphate of calcium and absorbs water; it also takes ages to dry, it may well detach itself; not a good idea.Personally a couple of days before applying a "badigeon", I would smooth asperities with a "barbotine". Link to comment Share on other sites More sharing options...
joidevie Posted May 1, 2011 Author Share Posted May 1, 2011 Is a "barbotine" a form of 'stuc' like what I've been struggling with? I've been toying with mixes of chaux arienne and poudre de marbre and finding it quite hard work?Thanks again.. Link to comment Share on other sites More sharing options...
pachapapa Posted May 1, 2011 Share Posted May 1, 2011 A mixture of a liant and water in equal proportions.Marble suggests a tadelakt rather than a stuc.Lots of how to videos on Daily Motion and You Tube.Gives a smooth impermeable finish like marble.Suitable for a wet-room. Link to comment Share on other sites More sharing options...
joidevie Posted May 2, 2011 Author Share Posted May 2, 2011 Great, many thanks indeed.. Link to comment Share on other sites More sharing options...
sid Posted May 2, 2011 Share Posted May 2, 2011 I didn't understand any of that! [blink] ... asperities, barbotine, tadelakt, stuc ?? I feel as though I'm either dyslexic or listening to a Scrabble champion. [:D] Link to comment Share on other sites More sharing options...
Théière Posted May 2, 2011 Share Posted May 2, 2011 [quote user="sid"]I didn't understand any of that! [blink] ... asperities, barbotine, tadelakt, stuc ?? I feel as though I'm either dyslexic or listening to a Scrabble champion. [:D][/quote]Tadelakt is an Morocan finish plaster (polished) with a high content of marble dust, look great when done properly and doesn't require paint.as to the others..........Stuc, Stucco, is a lime bonder used for pebbledash type of finishes.Lime plaster is calcium carbonate.Plaster of Paris is sulphated calcium carbonate. Link to comment Share on other sites More sharing options...
sid Posted May 2, 2011 Share Posted May 2, 2011 Thanks Teapot, whilst I was being facetious it's good to have the explanations. Link to comment Share on other sites More sharing options...
pachapapa Posted May 2, 2011 Share Posted May 2, 2011 Stucco, is a lime bonder used for pebbledash type of finishes.The Eyeties do a nice line in pebbledash,almost as good as a hammam in Marrakech.[:)]http://www.stuccoitaliano.it/03-photo-galleries/interiors/gallery-interior.html Link to comment Share on other sites More sharing options...
joidevie Posted May 3, 2011 Author Share Posted May 3, 2011 ... I can add however, that I found the chalk/marble powder combination very hard to work.. Quite unpredictable, and sticks to some places better than others. A coat of dilute tile glue helps sometimes. Hard to get level if the surface is wavy, and I resorted to some plaster in some parts as we will lime wash anyway..Let's call it a 'finition rustique'.. Well, that's my spin on it! Link to comment Share on other sites More sharing options...
pachapapa Posted May 3, 2011 Share Posted May 3, 2011 Old buildings ,particularly in areas "franciliens" may have used an "enduit" called "enduit de montmorency"; this contains plaster or more correctly gypsum; the material absorbs water like blotting paper and can make application of a lime "enduit" extremely difficult. Spraying immediately may ameliorate the problem but if the surface is particularly refractory then the application of a " gobetti" base may be necessary. The "montmorency" tribe are found inside and outside, as well as their traditional use in "ravalement".The link below gives information on the material. Whilst an "enduit de montmorency" can be made up it can also be obtained in bags from your local brico. I never use it. But sometimes have to remove it or cover it.I hate anything "parigot".[:D]http://www.platre.com/platre/Document/EnduitDeMontmorencyEnRavalement/doc?type=DataSheet&language=fr Link to comment Share on other sites More sharing options...
joidevie Posted May 3, 2011 Author Share Posted May 3, 2011 Very interesting reading..So might this be a compromise for skimming a 'breathable' coat to the previously 'damp' wall with a 3-5mm couche? Basically a little plaster added to some aerienne?Also interesting is how our badigeon (lime wash) is 'drying' once painted onto such a mixture of old surfaces - quite blotchy, plenty of staining through from previous applications/materials.. I'm hoping more coats will minimise this.. (Our badigeon is chaux, poudre de marbre and a dash of "Predose" which seems to be a protein type additive to give adherence & an almost 'pancake batter' like consistency..)..Cheers.. Link to comment Share on other sites More sharing options...
WJT Posted May 4, 2011 Share Posted May 4, 2011 I have had all sorts of problems with badigeon, it is the one reason I chose two artisans because they used natural materials and I thought it would be beautiful. We ended up having to use paint and I am having to try take it off our large living room walls. In fact I can't get them to return my calls so not sure what to cover it with. Apparently you can't just paint over it, it must be sanded down and a special resin put on before applying paint. It is a nightmare and sadly I would never recommend these products. If only I had just gone with ordinary emulsion paint! [:(] Link to comment Share on other sites More sharing options...
joidevie Posted May 4, 2011 Author Share Posted May 4, 2011 [quote user="WJT"]I have had all sorts of problems with badigeon, it is the one reason I chose two artisans because they used natural materials and I thought it would be beautiful. We ended up having to use paint and I am having to try take it off our large living room walls. In fact I can't get them to return my calls so not sure what to cover it with. Apparently you can't just paint over it, it must be sanded down and a special resin put on before applying paint. It is a nightmare and sadly I would never recommend these products. If only I had just gone with ordinary emulsion paint! [:(][/quote]What sort of problems were you having? Patchy drying/staining perhaps? Cheers.. Link to comment Share on other sites More sharing options...
WJT Posted May 4, 2011 Share Posted May 4, 2011 All sorts of problems on the plasterboard, it was very patchy and they had to start using emulsion paint. But the living room was plastered and the plaster started cracking and coming off the walls. Apparently the badigeon had lots of water in it causing this problem. Prior to this problem the badigeon started peeling off the plaster all together in areas.I would never have badigeon again after these problems but in all fairness I think it was all down to the artisans (self proclaimed experts!) not understanding the work properly. Can't even get one to return my calls, I think it is beyond him. The badigeon is very powdery so can't just paint over it. Link to comment Share on other sites More sharing options...
joidevie Posted May 5, 2011 Author Share Posted May 5, 2011 Poor you!We've done a fair bit of 'research' via a couple of 'eco' type specialist suppliers, and this "Predose" additive seems key, and stops any 'powdering'.. No problems with plaster falling off (yet), though this doesn't seem to be becoming an issue.. It's the patchy colouring and some staining through that is causing problems right now, however it is the first coat only so far..Regards.. Link to comment Share on other sites More sharing options...
WJT Posted May 5, 2011 Share Posted May 5, 2011 The artisan that applied the badigeon added some sort of additive for just that but it didn't seem to help in regards to the plaster. As you, there were also patches and staining problems, not to mention that in some areas it started flaking off. Good luck with sorting your problem out I am sure mine is quite rare.If there is a cowboy within miles I am sure to find them! [:D] Link to comment Share on other sites More sharing options...
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