Building Conservation | Lime, Mortar & Plaster Part 1

Users and custodian of Grade 1 listed Union Chapel in Islington explain what the built heritage means to them, the role it plays within the community and the contribution it makes to well being, sustainability and sense of place for those experiencing it and how to get involved.
Master Craftsman Stephen Bull shares his knowledge of decades of experience in building conservation, (from SPAB guardian, member of Georgia Society, craftsman, etc) and demonstrates how to prepare traditional lime, mortar and plaster. From the beginning of the process making hot lime, to the finished product on the wall. In part one he shows how to set out a hot lime mix, how to prepare traditional mortar mix for bricklaying and lime putty mix for a base coat for plastering.
Part 2: • Building Conservation ...
Union Chapel is a Grade 1 listed fantastic Victorian gem in Islington, a world-renowned, award-winning performance venue where heritage, faith, community and progressive values in the service of social justice come together at the heart of Islington.
Built heritage and conservation play a very important role to the community well being and sustainability. As part of Union Chapel heritage programme supported by Historic England, discover how you can take part to it by using the trade secrets to repair traditional buildings and help us to preserve our heritage for future generations.

[@thechodfather]

What a generous, clever, informative and clear well spoken chap…I learnt so much…in such little time…

[@StanOwden]

I like that you take safety precautions seriously.

[@1973jdmc]

Exceptional presentation. I'm renovating my old stone house and found your lecture very very useful. Thank you so much.

[@adrianhowell9762]

We need more of this type of instruction videos. They are invaluable. Thank you

[@niallwildwoode7373]

I've learnt a heck of a lot from this. So many mistakes I could have made, esp with the additions of water.

[@bigjmal]

Stick a decent sized stone in your mixer and that acts to squeeze and work your mix. You’ll go through the odd mixer barrel but you’ll save a whole lot of work!

[@ianwhitehead3086]

I needed to see this as I hope to be tuck pointing someday…

[@paulnolan1352]

Very interesting and informative video. I use Lime for pointing and rendering up here around the Lake District on Substrates like Slate, walling Stone etc and now having a bit of experience with it, the skill is in the prep and time, it’s a patient skill and is not a one size fits all approach. Gable ends, Church Towers and floors are my usual jobs. Your videos are some of the best I’ve seen on this subject. Thanks.

[@owenwilson8822]

Amazing, thank you. I wish there were more videos like this.

[@milosmaric50]

I remember when lime wasn't available in fine agregate in bags like today.Actualy it was but it was very expensive.Then people were buying lime in form of stones and they dig hole in ground and put all that stones in it and then pour water on it and it was nasty.Later you have something like white soapy lime and you simply grab out of hole how much you need and mix with sand and you have excellent mortar which last forever.

[@thakurshouryapratapsingh3506]

This is what we've been using in IND for thousands of years, many temples, Forts you'll find still standing after say 1000, 2000 years or more. Cement is just 1000X bad for the environment. Carbon footprint is huge compared to lime mortar. + concrete's life is no where close to Lime's. Enjoyed the video. Lets build more with Lime Mortar again. 👍🏻

[@adobemastr]

@Remodeling with Robert Crabtree thank you for your post. Can you give us a little more information on your project? Thank you.

[@adobemastr]

@Remodeling with Robert Crabtree Thanks.

[@adobemastr]

@Remodeling with Robert Crabtree Thank you.

[@Nelferch]

Wish I’d seen this before my renovation project! Still, very useful information for the future!

[@Mark-oy9lw]

We need to see more of this man. 👌

[@iwayini]

What a great video! Thank you for making this. Very informative.

[@towerdave4836]

Bagged NHL is so much easier. I still mix by hand as you’ve more control over getting a consistent mix/colour. Also I add the mixture to water and keep adding and mixing in the bucket until I get the right consistency. Seems to be OK . I’m over half way through repointing a beach cobbled building right on the beach and exposed to North Westerlies. Using NHL 3.5 and a mix of three aggregates from Ty Mawr at Brecon. Been at it for over 15 years on and off and reckon I’ve got another 10-15000 cobbles to go!

[@samuelliao9216]

Longyi patented built-in 3 classifiers dry grinding machines already put into mass production. For limestone/dolomite/calcite The whole grinding system power is around 370Kw A.D97=4.8um (≦2um: 73.5%) Output: 1000kg/h Energy Consumption: 296Kw/Ton B.D97=6.3um (≦2um: 64%) Output: 1500kg/h Energy Consumption: 197.3Kw/Ton C.D97=7.1um (≦2um: 57%) Output: 1900kg/h Energy Consumption: 155.8Kw/Ton For Talc powder, Longyi powder grinding mill power is 250Kw, the real working power is around 200~225Kw, including classifying system. A. D90=10.5~10.7um output: 4 tons/hour B. D90=9.8~11um output: 3 tons/hour It is suitable for processing nonmetallic minerals such as calcium carbonate, calcite, Kaolin, clay, barite, talc, gypsum, limestone, calcium oxide, bentonite, dolomite etc. Samuel MP/Wechat/whatsapp: [phone]

[@ControlVee]

thanks very much for this presentation!

[@T3hJones]

Awesome! Had no idea cement started at 45 newton :o. Had no idea about alot of other stuff too :D.

[@stephaniewilson3955]

If you add the lime to the water you will get boiling mix but not explosive.

[@jadeboulton4419]

Where is your sweater from ? It’s beautiful

[@ps-m1926]

Fabulous video- how exciting! Chemistry at work. Our ancestors were so clever- I had no idea you could buy horse hair for lime pointing. I'm renovating an old stone house using 3.5 NHL lime for the main repairs but I suppose the lime putty would be the best sort of lime to point the stones or cover them altogether with a pigment. Thanks.

[@mickeymortimer4407]

check out Michael James design, gotta know exactly what you're doing in this particular field, for the buildings' sake and the old-timers whose fabulous work we're supposed to be repairing

[@sleepingdragon93]

Thankyou for this video, I absolutely love using lime, and you have given a perfectly explained insight. I wish I could have had some training from you

[@samuelliao9216]

Dear manager, Longyi New patented built-in classifiers dry grinding machines already put into mass production. 1.Powder from 325~4000mesh, fineness is adjustable 2.Built-in high efficiency classifier, no more investment cost for classifying system. 3.Smart PLC operation system, and integrated control system: 1 computer could operated max 6 machines, saving management cost. 4.No particle air pollution, more environment-friendly. 5.Compact structure to save factory space and lower foundation construction cost. For limestone The whole grinding system power is around 370Kw, the real working power is 80% 296KW 1.D97=23um (600mesh) Output: 10tons/h Energy Consumption: 29.6Kw/Ton 2.D97=16um(800mesh) Output: 8tons/h Energy Consumption: 37Kw/Ton 3.D97=10um (1250mesh) Output: 4.5tons/h Energy Consumption: 65.7Kw/Ton 4.D97=6.5um(2000mesh) Output: 2.5tons/h Energy Consumption: 118.4Kw/Ton For Talc powder, Longyi powder grinding mill power is 250Kw, the real working power is around 200~225Kw, including classifying system. A. D90=10.5~10.7um output: 4 tons/hour B. D90=9.8~11um output: 3 tons/hour It is suitable for processing nonmetallic minerals such as calcium carbonate, calcite, Kaolin, clay, barite, talc, gypsum, limestone, calcium oxide, bentonite, dolomite etc. Samuel MP/Wechat/whatsapp: [phone]

[@edinburghwheatgrass8106]

Thanks, very informative. Would rolling this stuff in a high quality plastic bag be much quicker?

[@DanielOlivierArgyle]

It's your job now to make a light weight roller mixer that can be filled on site with water in the roller for easy mixing

[@stihl3826]

Can you do a demo on hot mix mortar as opposed to dry slake ?

[@malik51973]

Nice vedio,what is the best for mortar and plastering lime putty or hydrated lime??and also is it lime plastering waterproof??

[@leafside]

I have just bought a very old stone and lime wall house and really want to keep to traditional building techniques which is lime instead of cement and am trying to gather as much information I can to share with the builders who of course just want to do cement!!!! Your video is super helpful but I have a question.. If I’m mixing my lime from dry powder lime, making it into a putty to then use it with a mix of sand to plaster my wall, I have to cure it for 2y (let it sit in a bucket) or, buy ready made wet putty? Thank you so much.

[@mickeymortimer4407]

hotlime is what you need, check out Michael James Design or Nigel Copsey, try a hotlime wash too

[@foesure]

Is the red sand soft?

[@user-hz1gj1yv8x]

it was used in bharat around 100years ago

[@dabrownone]

He must have put his own beard hair in the plaster at some point..

[@miteshjayantipatel]

N dont forget to mention all this knowledge came from india. Otherwise like ur forefather u will claim it

[@alwayslearning7672]

Nope...Ancient Greeks, Europeans ,Turks and Arabs were using it for thousands of years.

[@miteshjayantipatel]

@@alwayslearning7672ofcourse u can live with ur lies....

[@miteshjayantipatel]

@@alwayslearning7672 kzbin.info_e0gczi-b_4?si=-GfIDuOU3lazSkGo They all learned it from bharat what u call india

[@miteshjayantipatel]

@@alwayslearning7672 kzbin.info5WCRfgdlhKg?si=7_Lkc_4TDckxu9-j