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 Post subject: plaster issues
PostPosted: Tue Jun 29, 2010 11:53 am 
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We are plastering over insulated plasterboard which has been fixed to follow contours of original walls and roof beams - so looks a bit like crazy paving in places, lots of small pieces as it can't be bent curved as much as needed. Because of the irregularities hardly a single edge could be left uncut... but I always enjoyed jigsaw puzzles. Final effect is superb.

Some questions:

1. Is their anything that can be added to the French plâtre to slow down its hardening time? (Saw one suggestion of 15g Choux per litre, another for lemon juice?) - High temperatures seem to make it unusable in minutes.

2. Why is it necessary to wait 1 to 2 months before painting?
2a. What is the impact of painting earlier?
2b. Is their anyway to tell when it is ready for painting?
2c. Do the high temperatures make the waiting period shorter.

3. How does enduit de lissage differ from plâtre, i.e. formulation, E de L seems to be a much friendlier product for plastering. n.b we are after an irregular surface, smoothed by hand rather than flat tools.

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 Post subject: Re: plaster issues
PostPosted: Thu Jul 08, 2010 10:52 am 
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Many thanks to A for his useful phone call.

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 Post subject: Re: plaster issues
PostPosted: Sat Jul 10, 2010 9:25 am 
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Shame he couldn't post the info here. I too would have been interested to see the responses to your questions. I assume you had all answered?


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 Post subject: Re: plaster issues
PostPosted: Sun Jul 11, 2010 10:27 pm 
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Can't help with the additive side of things...think some products have a longer 'working' time which is signified by various numbers on the bags. Re. the painting, though, I'd definitely confirm that the longer you wait for the plaster to dry out completely, the less hassle you'll have with paint peeling off the walls or having to fill gaps round doorframes etc.

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 Post subject: Re: plaster issues
PostPosted: Sun Jul 11, 2010 10:43 pm 
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I am no plasterer but do use the stuff and have worked with tradesmen in both the UK and here.
Multipurpose plaster can be slowed by adding about 20% adhesive plaster BUT
If you don't need to use it there are easier ways.
For Frank all gaps bigger than 2 to 3 mm could be filled with adhesive plaster. Keep this clean. It can be carved with a surform or flatknife but is not condusive to sanding.
Then all joints have to be taped. I recommend adhesive fibreglass tape as it is easier to use than the paper and you have less risk of leaving an air pocket behind the tape.
Then use jointing plaster. This can be applied smooth . It shrinks so it will need 2 coats. It is easily sanded and the second coat can be used to produce a textured finiish or to be sanded to a smooth but rounded finish that follows the contours. Do not apply jointing plaster thicker than 3 mm in one go. I find painting can take place as soon as all surface is perfectly dry. Watch the colour change from beige to white. For decorating first coat must be sou couche or piss coat emulsion. ie very thin to soak in. You will get shrinkage against other mats like windows and doors and this is why , in part, architrave is used but there will be no cracking in the wall itself.


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 Post subject: Re: plaster issues
PostPosted: Wed Jul 28, 2010 1:20 am 
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@noisette isn't this 'peeling paint' part of French culture :)

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 Post subject: Re: plaster issues
PostPosted: Wed Jul 28, 2010 1:26 am 
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Filled a lot of the gaps with the adhesive for the boards and it seems to sand well. Other gaps got filled with expanding foam and then topped over. Some areas have shown cracking at joints, so currently completing all gap filling before 'lissage' over... so yet to know final result.

We had done a textured plastering over already taped boards in Amsterdam so have some experience of achieving the 'decorative' effect sought... we shall see in another week or two.

Will add pics of the final 'mess' (-|

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 Post subject: Re: plaster issues
PostPosted: Wed Jul 28, 2010 1:29 am 
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Going to attempt to mould the door surround on the balcony with the now un-needed French plaster. This has mostly been re-purposed for casting objects for our art. And for our daughter to have some fun with.

see viewtopic.php?f=15&t=10773

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 Post subject: Re: plaster issues
PostPosted: Mon Aug 06, 2012 5:06 pm 
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Location: Cher
Does anyone know what product in France is the same as Lafarge plaster in the uk, as I just tried a sac that was given to me and it went solid before I even finished mixing it. It was called Platre extra fin so I am sure this is more for fixing walls than for plastering new ceilings.


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 Post subject: Re: plaster issues
PostPosted: Mon Aug 06, 2012 5:55 pm 
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Location: Hereford sadly not 33 or 87
Lutèce 3000 and Lutèce 2000 are more like UK plasters

http://platre.org/platre/forum/post.jsp ... sur+platre


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 Post subject: Re: plaster issues
PostPosted: Tue Aug 07, 2012 10:08 am 
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Anton Redman wrote:
Lutèce 3000 and Lutèce 2000 are more like UK plasters

http://platre.org/platre/forum/post.jsp ... sur+platre


Thank you for that I found some Lafarge plaster products at leroy Merlin however when one looks to see which depot sells the stuff most say not sold here.


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 Post subject: Re: plaster issues
PostPosted: Tue Aug 07, 2012 12:19 pm 
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Location: Ardeche
If you have a Point P locally you could try there

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 Post subject: Re: plaster issues
PostPosted: Fri Aug 10, 2012 8:42 pm 
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thelastoneout wrote:
If you have a Point P locally you could try there

Thanks Andy yes found one going tomorrow found out the 3000L L standing for longer drying. Don't try the multifunction Platre at Intermarch also goes off within 10 mins.


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 Post subject: Re: plaster issues
PostPosted: Wed Aug 22, 2012 2:05 pm 
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For those interested lutece 2000L purchased at Point P is not bad for plastering mixed into fluffy cream and gives enough time to play a bit, when it goes off a bit found that a little extra water keeps it going a bit but best first time around. Have not been able to purchase 3000L. have found plenty of thistle in English adds though and one that offers Thistle at 10.00. Lutece 2000L is expensive at just over 20€ a bag. Bad when you see a similar product at Wicks at £5 a bag.


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 Post subject: Re: plaster issues
PostPosted: Sun Jan 06, 2013 3:17 am 
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Worse when you see all that cash to turning to hard rubble... still tried doing odd tasks with the standard French stuff and still mostly ends up as rubble. So what do the French pros do? Mix it up cupfull at a time... or do the pros buy abroad :lol:

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 Post subject: Re: plaster issues
PostPosted: Sun Jan 06, 2013 10:04 am 
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FranknCarmen2 wrote:
Worse when you see all that cash to turning to hard rubble... still tried doing odd tasks with the standard French stuff and still mostly ends up as rubble. So what do the French pros do? Mix it up cupfull at a time... or do the pros buy abroad :lol:


Have you tried using Lutece 2000L with the correct amount of water because it last long enough to do the job well and also has a cream finish which saves you painting for a while. Maybe you are using Platre which is just polly filla or similar anyway and that is no good for plastering. If of course you live down south you could pop into the british place that sells UK plaster though that does need painting or plastering afterwards.


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 Post subject: Re: plaster issues
PostPosted: Sun Jan 06, 2013 12:13 pm 
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Never did find Lutece in the area. More just wondering how the stuff that is sold here is used as I still have 50kg? Even if you mix it too runny to use as more than a quick filler it still turns to stiff putty in 5 minutes and rock 5 minutes on. With recommended quantities it goes off while being mixed.

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 Post subject: Re: plaster issues
PostPosted: Sun Jan 06, 2013 4:38 pm 
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You are in my area and lutece 2000 is sold in all outlets of POINT P one at Bourges etc.
Q/ What is the name of the product that you are using please


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 Post subject: Re: plaster issues
PostPosted: Sun Jan 06, 2013 8:47 pm 
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Had a quick look into Point P St Amand once, but left unimpressed.

Product is Joker Platre Multi-usage

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 Post subject: Re: plaster issues
PostPosted: Sun Jan 06, 2013 8:54 pm 
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FranknCarmen2 wrote:
Had a quick look into Point P St Amand once, but left unimpressed.

Product is Joker Platre Multi-usage
Well that,s your problem you are trying to plaster with Polly filla or just filler. You were not meant to be impressed by Point P, but they do stock Letuce2000 and other plaster are available from Leroy on order though and they all have the manual on them. Letuce for me is far too expensive but that's all they do in this region. I understand that the people of this region don't like plaster as it reacts with the lime they use for building, I have not found this to be the case but time will tell.


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 Post subject: Re: plaster issues
PostPosted: Mon Jan 07, 2013 2:45 pm 
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FranknCarmen2 wrote:
Never did find Lutece in the area. More just wondering how the stuff that is sold here is used as I still have 50kg? Even if you mix it too runny to use as more than a quick filler it still turns to stiff putty in 5 minutes and rock 5 minutes on. With recommended quantities it goes off while being mixed.


This sounds like that its old, and dead, plaster only has a short shelf life, 3 to 4 months from time of manufacture is what the manufactures say is the shelf life of plaster

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 Post subject: Re: plaster issues
PostPosted: Mon Jan 07, 2013 4:00 pm 
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Ahh! Why such a short life :o Not sure how long we had it before first use... is a couple of years old now I guess. Still useable though (after a fashion)

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 Post subject: Re: plaster issues
PostPosted: Mon Jan 07, 2013 4:20 pm 
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FranknCarmen2 wrote:
Ahh! Why such a short life :o Not sure how long we had it before first use... is a couple of years old now I guess. Still useable though (after a fashion)


Because it picks up moisture vapour from the surrounding air

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 Post subject: Re: plaster issues
PostPosted: Mon Jan 07, 2013 5:58 pm 
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This is the stuff.

Attachment:
plaster.jpg


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