Using lime mortar for repair at a medieval hall house | The Landmark Trust 

Superb film. Anyone who intends to start work on an old building should watch this. Love it; technically and philosophically perfect.

“ The softness is their strength.“ (Two:47) Very profound statement.

what a chap, what a superb attitude toward restoration, really sympathetic toward the building.

Beautifully presented with an abundance of proper information on restoration processes.

I have just found this video , and it’s been fascinating.

What a brilliant, informative video! This is a refreshing philosophy to employ when restoring old buildings, here in France nearly all such work is too tidy and does not reflect the building's usage and historical significance. Long Live Lime!!! (and the people who use and appreciate it). Thanks for explaining the presence of coal within the old mortar which we've seen in our own home-an 18th century longere. Same methods and architecture, different country. Keep up this fantastic work. Best Wishes from Normandie, Andy.

Thank you, so much. This presentation clarified so much of what had, hitherto, been a nightmare of contradicting opinions.

Excellent, informative video. Thank you for sharing your knowledge. I learnt how to work with lime so that I could repair my own historic house house. Wonderful stuff!

Well done thank you this was very interesting.

any videos about dry stone building repair? And how to lift the very big stones they used.

I found a lime and cow dung plaster mix round one of my t windows and maybe on some parts of the walls on my house in Spain. the plaster sounded like lime and cow dung in some places. Wet it smelt like fresh cow muck. In ohter places some parts of the house seemed to have been covered with lime and sand plaster and others lime without sand and others lime, local clay and sand. IIt seems to me that the plaster on the walls have been repaired in hte places it had fallen off so that what is on hte wall is a patch of one thing in one place, cow muck and lime say and sand and lime in another, and lime, the local red clay, and sand lime plaster in others. The stones are held together with clay and combed goat and so the lime plaster has in places, like below the windows were rain falling the sills caused the clay to bleed out so that the walls been coloured by the clay and so hte plaster is pink in places.

Great information, I have a question, can I use lime mortar to lay down and secure flagstones on a ground surface to restore an old stone pathway? I don't want to use cement.

I am plastering the interior of an old brick building and we were recommended NHL5 1:4 ratio with sand. Being that the NHL5 is the least permeable between the hidraulic limes, should I change to NHL 3.5 even if the first coat of 0.5 mm was already made with NHL5? As I learn more about this system more, I feel the recommendation was incorrect...

What guage ratio do you use for laying bricks using nhl3.5

I am surprised that it wasn't pointed with like to like material and in this case at least it would be a hot lime. So they didn't bother to slake quick lime on site to achieve better mortar and instead they just bought bags of nhl. It's lazy and I am not impressed. And I don't agree that there is an honesty in the new pointing. It's not flashed enough with the stone, the more quality mortar the better it is for the stone. it's hard to achieve that with the NHL. The workability of nhl is not great, this material is not sticky enough. The functionality of hot lime is much greater than the NHL, ability to remove moisture from the stone through the capillary reaction and what goes with it removing salts from rain water, hence protecting the stone is much greater. But what do I know, just did some research for my project but anyone who is interested in lime pointing should do his/her homework and choose the best material possible . Just my opinion based on a lot of research and common sense.

aaargh yes i know where this guys coming from/,,,,,,early maori here in new zealand used an ancient mortaring technique using, 3 parts moa crushed bone, 6 kiwis, 10 pounds of puha, volcanic sand mixed with boiling mud from rotorua to build New Zealand's parliament building

Restoration is different from recreation.