Adding lime to mortar

Question

What's the difference between lime and hydrated lime? Which do I add to mortar to make it easier to use?

Yousuf · Answer

Personally I would only use lime if I was to render, if you only need it to make morter more pliable and last long you can get plasticiser / admixture.
Hope this helps

Mark · Answer

Hydrated lime is what to use in mortar . Be wary of chemically burning yourselve . Use protection .

Eric · Answer

Hi Harry, I would say both kinds of lime will do the same job , but hydrated lime has had water added and additives to make it softer and used for the garden and plants, I use lime when building stonework as the building has movement and with lime will not crack , but a strong cement will crack , best thing u can do is Google it hope this has helped you good luck .

John · Answer

"Well Harry, when possible we normally would use pit sand for bricklaying mortar with plastiser added. If the the sand is say soft washed it's no good for laying bricks without the addition of hydrated lime to make it workable.
Nowadays it's the only lime used with the possible exception of lime putty with is used on gauged arches and glazed bricks exclusively."

Lee · Answer

Just use a mortar plasticiser it’s a bit like washing up liquid

Joe · Answer

Hydrated lime more prevents cracks so is the better option but they will both do the job.

Lee · Answer

Any lime will just give you more time with your mortar normally use it when rendering

Roy · Answer

Hydrated lime is the best for mortar stops cracking and allows movement

John · Answer

Well Harry, when possible we normally would use pit sand for bricklaying mortar with plastiser added. If the the sand is say soft washed it's no good for laying bricks without the addition of hydrated lime to make it workable.
Nowadays it's the only lime used with the possible exception of lime putty with is used on gauged arches and glazed bricks exclusively.

Neil · Answer

You need to add hydrated lime to the mortar. This takes away the need of using plasticiser.

Adding lime to mortar

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