[ClarenceBauer]

If you need info on lime in London check this site.
www.historic-scotland.gov.uk
Address: Historic - Scotland, Longmore House, Salisbury Place, Edinburgh EH9ISH Tel: 0131-668-8638 These people will know all about Lime in the UK.

 

[ClarenceBauer]

Hey Vandertree,

Lots of confusion for me on Lime, Hydrated Lime, Hydraulic Lime, etc. From what I've been able to determine - Hydraulic Lime is what would be needed - mixed with sand in a ration of 1 part Hydraulic Lime to 2 parts sand.

Historic Building Products (Historic-Building-Products-Ltd.) in Toronto is the place to go if you want to attempt this yourself. I spoke to them on Monday and they were extremely helpful and knowledgable.

Another alternative is to purchase Type-O mortar.

Home Depot carries this in 2kg pails and is called "Sakrete Mason-Craft". It can't be stored in bags due to the lime content. This should be completely fine given the extremely low compressive strength (350PSI).

Personally, I went with the Sakrete Mason-Craft as the directions are very straight forward (there's even a youtube video) and I didn't want to make a mistake with the mix ratio, including the amount of water to add - this needs to be exact for Lime mortars.

It's a bit more expensive ($11.99 per pail) but for my application I only needed 3 pails. So it was fine.

Best of luck.

See if you can locate a copy of this booklet.