Application and Preparation of Limewash (2008-07)

In this video NCPTT's Sarah Jackson discusses the application and preparation of lime wash.
Limewash has long been used world-wide as a surface finish on the interior and exterior of buildings, homes, and other structures. Limewash is a mixture of slake lime and water with or without additional additives.
The National Park Service's National Center for Preservation Technology and Training protects America's historic legacy by equipping professionals in the field of preservation with progressive technology-based research and training. Since its founding in 1994, NCPTT has awarded over $7 million in grants for research that fulfills its mission of advancing the use of science and technology in the fields of archeology, architecture, landscape architecture and materials conservation.

[@TatyanaValdaBelindaHill]

This is very helpful and the speed of delivery is just right (not too quick - at least for a native speaker). Thank you. xx

[@ivanxyz1]

Thank you for this video. I used the techniques on this video on my tiny house and it worked great. I love liming.

[@Evolventity]

Very informative and helpful. Thanks!

[@shyft09]

it would be great to have a link to the research (for the consistency, number of coats, no salt or linseed oil added for example) where do your recommendations come from? (for example, I realise some historical societies had a lot of time on their hands but 5-8 coats? I would have thickened it up a little and used 3 coats)

[@RaraAvis1138]

Exactly what I was looking for❤

[@jeremiahnichols2729]

When I slake my quicklime I rarely ever screed or sieve the tiny lumps. Especially on a exterior limewash or even a traditional lime render for that matter. Definitely do it for interior work though. Hotmixed limewash I believe is the best as it sucks moisture out of the wall as soon as it is applied. Beautiful stuff to work with when dealing with a damp traditional fieldstone basement. As for brick i always water down the wash, use it still hot after sieved through a food strainer. If its thin enough ill apply it straight to a dry plaster wall. If its a stone wall I always apply hot and thick with sand mixed so as to dig deep into any voids. Limewashing brick i always soak the brick first for a few minutes. The longer the better. Thin for the win with aged lime putty. Thicker with a hotmixed limewash.

[@nowirehangers2815]

Do you add anything else please?

[@jeremiahnichols2729]

@@nowirehangers2815 rarely. If I do id say add some stone dust from a quarry.

[@nowirehangers2815]

@@jeremiahnichols2729 cheers thank you. There seems to be a whole lot of complicating a very basic process and I choose to just keep it as simple as I can. I have a concrete fence,it’s supported by rebar inside it somewhere but it’s very old and looks quite bad. Grey,starting to crumble a bit. It’s only like 3 and half foot high but it’s got wrought iron work on top and I think it’s all kind of hideous. Can’t afford a new fence but can definitely make the cement look a whole lot better and hopefully give it a bit of hope. I appreciate your response.

[@jeremiahnichols2729]

@@nowirehangers2815 a basic hotmixed limewash will brighten it up. It will stain over time though just from cracks and water buildup.

[@shyft09]

Great video, but if anyone is considering doing this themselves, its probably best to test the process out first with your own lime, water and weather. For my location there is way too much water being used here

[@nathanjaroszynski6210]

thanks a lot!

[@twitchtwitch9006]

what kind of limewash do yall recommend buying for tree trunks?

[@johnleeke]

Please don't lime wash your tree trunks.

[@davidfrederickyelland9233]

Thanks!

[@calvinbrown3213]

I noticed that some of the buildings that you worked on needed repointing of the brick walls before lime washing.

[@AtomDavis]

@@NerdyNEET Yep. basically those are the infill door. they'll take those out and then reseal every time the tomb is used. Plus they would alsu normally have a secondary "face" they'd add over that section.

[@tvsuper6615]

Caco3 and this video using white wash powder same or different??

[@nc1132]

They are different. Calcium carbonate is limestone which has just been crushed and not heated to remove CO2. The one they use in this video is Calcium Hydroxide or which is basically heated CaCo3 + H20. CaO also works.

[@NickFarrow]

What is the cup with a hole at the bottom called? I am thinking about 3D printing one?

[@oxytocina]

viscosity cup

[@kavishaarora8908]

I downloaded the video. But the subtitles are not getting downloaded. Kindly please help me with this.

[@TheDarkHunteress]

Can I use lime wash to change the color of cob? If so, what exactly do I have to add to the lime wash and is it easily available?

[@AtomDavis]

You can use powder pigment to change the color of lime, but you should be prepared to do a handful of tests beforehand to see exactly what the mixture cures to. If you are doing this, you should try to do layered coats on a sample surface. I have done this in an obscure corner before the project which works, and you can brush away much of the wash with a wire brush in slow, gentle strokes. Make sure to be VERY precise on your color to wash measurements, as the pigments will normally be very strong.

[@Cayapas]

Is it possible to lime wash brick fireplace (that gets very hot,--kind of rocket fire place)?

[@grinndex]

Absolutely yes.

[@muru1971]

Great video, thanks. It would be better if the narrator talks little slower :)

[@AnoNymous-2013]

you can watch it in 0.75 speed with CC on! it's a bit boring but you get to understand everything. Watching it with CC at normal speed is way to fast

[@Soulwrite7]

Disagree, ended up watching at 2x speed.

[@fragglefknrock7568]

you can make it thicker than in this video to reduce coats. this will take a longer time. with a perfect lime wash you should only need 2-3 coats not 5. this is time consuming and unnesesary.

[@nowirehangers2815]

Hey thank you

[@crptogroot23]

everythig that was said here was bang on maybe dont use a hose just a water sprayer lol

[@deborahsteady3779]

hard to imagine the technique while chasing after the quick elocution.

[@Oasis_Desert_Rose]

5 to8 coats! Wow... No salt?

[@jerrymcintire7902]

No salt needed, unless you add pigments. Really only need 2-3 coats.

[@shyft09]

I'm also not convinced about the "skimmed milk" consistency, it runs right off the wall if you do that. Try a small area with "full cream milk" consistency and just 3 coats