Lime mortar

[prof_montoya]

Hi All,

I have a single front terrace in Flemington (Melbourne) built approx 1900's. I would like to repoint bricks all around the property. I am thinking of doing it with lime mortar? I understand it is what they used back then. What is the best way to make/mix it? Any suggestions on where I could source materials (e.g. lime, sand) so that repairs dont stand out too much? Do I need to go to specialist or just local hardware store. Should I worry about hydraulic and non-hydraulic lime?

Many thanks

[autogenous]

I would go for a 9 sand, 2 lime, 1 white cement ratio. You will get a colour difference.

The old lime does darken. Lime putty will keep the mortar workable longer.

Its hard work matching existing. Is it a light coloured lime mortar?

They haven't used peach sand or the sand out of your back yard?

Dig joints out to a depth of 10mm. Wash wall thoroughly to remove remaining dust etc.

Mix mud slightly thicker than toothpaste. Wet wall (Don't drown) to create the suction or mechanical key. Apply mortar.

Do you have a picture of the joints/wall? They are weather struck joints?

You can add a small amount of darker sand to tone the mortar back a bit. You will of coarse do a small panel somewhere it wont be seen to test the end result.