Lime Plastering

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petetheplasterer

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hi fellas
need some info on lime plastering, if any have used it on brick or lathe, id love to know the method, i know i can get ready mixed in tubs, but its the laying on i need to know ie;

how long between coats, can the finish be as good as modern gypsum plasters
working with grade listed buildings...any info would be great

cheers guys
 
Hello mate, I have done quite a bit of this kind of work but am no specialist on the matter.

Have a look at the cornish lime company website you may find some of the information useful

Rich B
 
,pete if working on grade 2 listed you will be unable to use gypsum,or some do to their bitter cost.finish can be just as good depends who applies it and grades of sand used.all our materials come from m8 of old mans.mike wye.great guy.you would probley be better with pre mixed if no exp of lime work or mixing.i usually leave up to 14 days between coats . depending on site conditions ,if you have not plastered on to lathe before you may struggle.all work will need to be carried out to spec.once you start you will soon understand why prices for lime work are so high. best wishes.
 
great thanks for the info, this job is a listed builing 16th centry but its a mix of modern plasters and lime plasters, im being emailed the architects specs, so will know more in the next couple o days, the inner outside walls are gonna be limed but even then not all of them, and some outside pieces need lime render onto mesh, im not fussed about the time span between coats,i think the owner tried some himself and knows the score. ive plastered onto lathe before, but not with lime, so its just knowing the set up really, and which mix goes on first, ie pricking up coat, float coat then finish, am i right that these are different mixes for each?? then the render, is this the same or totally diff mixes altogether...this is something that im really interested in so im gonna go for it anyway, as long as its done to spec..i reckon im gonna be ok, espesh as the guy says the finish hasnt got to be perfect....just more info i have the happier i feel, ill try the web sites and if any info from you all that will be superb, thanks again lads
 
Hi Pete,
just finished a stone farmhouse in lime plaster,all the pre mix materials were sourced from ty mawr,the website is excellent,i mixed the hydraulic lime with local washed sand,in between coats depends on the weather and how it's drying,the internal lime plaster is great to use,might be worth you going for a days course,about £100 food etc all in at ty mawr,if you have done a lot of plastering with care and plenty of info you should be ok.
 
Ive done quite bit of this but as has been said there are plenty of websites with loads of info but as far as i know Lime render onto mesh is no no check it with the architec and then with the lime supplier.
Lucius
 
specific. if i may be more specific,wouldnt be using hydraulic limes on cottage would if i may say use non hydraulic lime witch sets by carbonation.unlike hydraulic
 
By non hydraulic Jeda i take it you mean Lime Putty morter if so i have to agree the thing with Hydraulic is that it is realy being pushed by the manufacturers and Architects in pocket and has not realy stood the test of time other than when the Romans used it for bridge building underwater.
Lucius.
 
hydraulic lime,feebly hydraulic nhl1/nhl2 for use in internal plasters.
moderately hydraulic nhl3.5 external renders.
eminently hydraulic nhl5 for extreme conditions where high strength is required,but low breathability.
i do not use hydraulic lime internally,but buy the premix and knock up on site,to be more specific.It is up client/architect what they want,as for the hydraulic spec above, i didn't make this up jeda honest!It,s in black and white ask mike wye.
 
great info, cheers again guys, it is stainless steel mesh, the old stuff is hanging on s/s mesh... just a case of replacing the old with new...internally its non hydraulic premixed in tubs. im wondering about the finish coat tho, whats the procedure from laying on to finish??
 
The finish is no differrent just much finer, allow the base coats to cure and whack it on and look after it as i said before there is nothing wrong with this site but you are far better of looking for your answers from whoever is supplying the morter they will tell you what to do.
Lucius
 
Hi Pete,
the finish coat depends on spec ,the last job i did the finish was scoured up with a sponge,it's all about catching it right,nice finish and ideal for the limewash.The dubbing out/float coat, i prefer to use synthetic hair in lime putty it dosen't rot if left for a long time in the jumbo bags and it holds together better and less cracks,i buy it in bulk bags.Good luck,you'll be ok with it.The previous post is correct where you source it from,will give you advice,the day's course it excellent for advice and practical skills,always keep walls damp before applying coats, DO NOT SATURATE THE WALLS WITH WATER.When you get the spec,post it on here,regards specific.
 
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