June 3, 2010 @ 11:10 am
HOW TO RUN A SOLID CORNICE USING LIME PUTTY AND CLASS A PLASTER
This video shows the traditional method for running a solid Moulding
Duration : 0:4:22
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Posted by TheNathandan
June 3, 2010 @ 11:10 am
@volvot5se we left …
@volvot5se we left our lime over night to soak, the next morning we mixed 50% lime to 50% plaster. we mixed it with a power drill for about 3 minuets but it set rock hard in the bucket before we had chance to get it out the bucket? too much plaster???? thankyou for all your help so far. regards.
Posted by volvot5se
June 3, 2010 @ 11:10 am
@TheNathandan Just …
@TheNathandan Just spinkle lime into the water dont mix but make sure the lime is covered by water then next day tip excess water off and putty is ready to use
Posted by TheNathandan
June 3, 2010 @ 11:10 am
thanks for the …
thanks for the information, before soaking the lime overnight do u mix it up to a workable consisntancy first or just cover it in water? thankyou again.
Posted by volvot5se
June 3, 2010 @ 11:10 am
@TheNathandan Hi …
@TheNathandan Hi you need Hydrated lime and fine casting plaster the lime needs to soak overnight then you gauge enough Lime and plaster together to roughly build out the shape on the first run then gauge your second mix to complete the moulding
The ratio of Plaster to Lime should not be weaker than 50%
Regards
Posted by TheNathandan
June 3, 2010 @ 11:10 am
hi we are …
hi we are experimenting running a in situ cornice and are having problems identifing the correct mix for the plaster. please could you help us identify the correct plaster and putty to use, and in what ratio it should be mixed. we must have seen your vidio 50 times and have found it fascinating. thankyou
Posted by volvot5se
June 3, 2010 @ 11:10 am
We mostly have to …
We mostly have to repair lengths of original mouldings so we have to run into these so running down on a bench is not always the option because a lot of original mouldings members are sunken below the ceiling line mainly because the original moulding was run on the plaster screeds and then the ceiling and walls were the set afterwards
Regards
Colin
Posted by volvot5se
June 3, 2010 @ 11:10 am
HI Have had some …
HI Have had some profiles cut by laser or CNC but this is only for high class work normally we cut by hand and file to shape
Regards
Posted by mastercraftsman
June 3, 2010 @ 11:10 am
@volvot5se Also, …
@volvot5se Also, some questions. How do you cut your metal knife? I use to use shears and files; it was very time consuming. That is why I switched to the plexi. Have you ever had your knifes cut by water jet? If I have to ever have metal cut again, I am definitely doing water jet. It’s very affordable and accurate. And how long have you been doing this work? Family business?
Posted by mastercraftsman
June 3, 2010 @ 11:10 am
@volvot5se I know …
@volvot5se I know exactly what you mean. When we run a shallow moulding on a bench we deviate from the traditional moulding plaster and use use bagged veneer plaster. Diamond finish by USG here in america. It’s very strong even down to 3/8″ thickness. We reinforce the unit with nylon fiber and fiberglass mesh backing. I doubt if a historic commission would favor the use of veneer plaster, but it is very strong and achieves great detail.
Posted by volvot5se
June 3, 2010 @ 11:10 am
Hi and thanks for …
Hi and thanks for watching we also run sections down on a bench when possible unfortuanatly with a lot of vVctorian and Edwardian mouldings the members are not always deep enough to allow that when you are picking up on an original run
Regards
Sarah
Posted by mastercraftsman
June 3, 2010 @ 11:10 am
That crown mold …
That crown mold looks great. I also fabricate plaster crown molds and medallions. I use plexiglass for the knife and two rails for the sled. I use a rail on the ceiling and a rail on the wall. Waxed of course. I am capable of molding the miter by hand but I run small sections on a bench and cut them with a diamond saw and install the miter afterward. It saves time and looks fantastic.
Posted by volvot5se
June 3, 2010 @ 11:10 am
Glad to be of …
Glad to be of assistance
Regards
Posted by redtwin
June 3, 2010 @ 11:10 am
Hi colin thanx for …
Hi colin thanx for your info. Builders merchant is getting the plaster of paris in for me and going to give it a go. My garage is plasterboarded so going to try their first. Will let you know how i get on. A big thanx again.
Posted by volvot5se
June 3, 2010 @ 11:10 am
Hi There are a …
Hi There are a couple of ways to take a template of your cornice the first and more difficult is a clay squeeze the second way and the easiest is to cut through the moulding with a saw making sure the cut is square do this on a good section of the cornice then slip the zinc into the cut again make sure it is square to the wall and ceiling line and draw around your moulding. The saw cut can be easily repaired Hope this helps
Regards
Colin
Posted by redtwin
June 3, 2010 @ 11:10 am
Hi Colin, had a …
Hi Colin, had a look at your other video of the arch and you use zinc. Is that the same for this template?
Reason i ask is that a section of ours around 600mm, has crumbled away and every plasterer ive had cant repair it.
What do you take the template profile with?
Thanx again.
Posted by volvot5se
June 3, 2010 @ 11:10 am
Thanks for your …
Thanks for your comment.Yes you would normally take a template as years ago each plasterer would make the running mould himself as to the builders design ,So not one mould would be the same in anyway.One mould would be used on the estate being built so you can imagine if three plasterers worked on the same site each tradesman’s mould would differ in size by a small amount and would not match another man’s work unless they were all made by an engineering firm
Regards
Colin
Posted by redtwin
June 3, 2010 @ 11:10 am
Do you take the …
Do you take the profile of the origional cornice then make a template, or can you buy them made. Nice to see the origional methods still in use
Posted by MrWhothefoxthat
June 3, 2010 @ 11:10 am
i just done some of …
i just done some of this in collage i loved it. thanks steve if you read this.
Posted by volvot5se
June 3, 2010 @ 11:10 am
Hi Steve Joint …
Hi Steve Joint rules are various lengths of steel normally 4 inches in width with one end cut to a 45 degree angle used for carving your mitres they are honed on one edge.A float coat also known as a browning coat is a base coat on which you would apply your finishing coat too. Base coats are becoming rare in this modern world as plaster/wallboard is becoming a popular method as it only requires setting as for rabit it acts as a guide on your running mould only used in certain casesRegardsColin
Posted by volvot5se
June 3, 2010 @ 11:10 am
Hi Ramonetheonly …
Hi Ramonetheonly The plaster used for running in situ is Fine casting plaster the gauge to lime should not be weaker than 50% Herculite is the next strength up mainly used for benchwork .Running over window areas requires just the rule to span the area but your mould would have a rabit fixed to the underside of the horse.coping with uneven walls and ceilings requires you to run screeds of lime putty and plaster on the wall and ceiling line.Hope this answers the your questions
Regards
Colin
Posted by volvot5se
June 3, 2010 @ 11:10 am
We are based in …
We are based in Shepperton England
Regards
Posted by volvot5se
June 3, 2010 @ 11:10 am
Hi Steve Many …
Hi Steve Many thanks will answer your questions asap
Regards
Posted by volvot5se
June 3, 2010 @ 11:10 am
Thanks for your …
Thanks for your comment as you ask a few questions I will get back to you asap
Time is a little tite at the moment
Regards
Posted by ramontheonly
June 3, 2010 @ 11:10 am
very nice video – …
very nice video – great choice of music and very clear. May I ask a couple of questions? What plaster of paris are you using – I’ve used herculite for small repairs and casting new sections on the bench, would you use it for this? How do you cope with running above windows – presumably anything that could obstruct the run like mouldings needs removing and a board put up to span the opening? How would you cope with an uneven ceiling with the odd cm of deflection? Tips on making the mould?Tx
Posted by stevecoyne1
June 3, 2010 @ 11:10 am
Loved the vidio, …
Loved the vidio, where can i find out what the parts are called for eg joint rule, rabbet and what is a float coat,
kind regards steve