Traditional lime, assume I can't use concrete?

[NotJustin]

Hi all

 

I am restoring an old lime and stone church. I'm looking at Hanson Hydrated Lime which they say won't stick without concrete. I assume I can't add concrete to my lime mix? I have seen that rough sand may provide just as good a stick? Any help would be very much appricated.

 

Thanks

 

Justin

[PeterW]

Do you mean cement ..? And what are you actually trying to do..? Rendering or plastering ..? 

[Mr Punter]

Putty lime with no cement.

[NotJustin]

I shal be randering and plastering, but plastering will be first. Basically the whole building needs a bit of a lime going over.

[nod]

You can use a sand lime mix without adding cement 

and skim it with putty lime 

[NotJustin]

28 minutes ago, Mr Punter said:

Putty lime with no cement.

Can the Hanson Hydrated Lime  be used to make putty lime?

[NotJustin]

Just now, nod said:

You can use a sand lime mix without adding cement 

and skim it with putty lime 

Ah, ok, thanks

[Mr Punter]

10 minutes ago, Justin Tuijl said:

Can the Hanson Hydrated Lime  be used to make putty lime?

 

I think it can if you add water and leave it for a while (weeks / months) but I think the lime putty is supposed to be better.  Never used it myself and it is quite a specialist area.  If it is conservation type work do not use any cement at all.

[NotJustin]

I discovered what lime to use

[nod]

If you need a bit of practical advice 

Any of the colleges with a plastering course still use both line sand and putty lime 

As it can be easily chipped off Then ground up and continually reused 

[PeterW]

If you need advice and a lot of lime then get in touch with Mike Wye - probably one of the best and most knowledgeable suppliers of lime products. 

[Reiver]

You might find something useful here: www.buildinglimesforum.org.uk.

[jfb]

Hydraulic lime is what you want not hydrated. Hydrated is used more like a plasticiser.

You can do all rendering/plastering with hydraulic lime and sand, no putty needed - a lot cheaper I would think.

I would use sharper sand for scratch coats and a finer plastering sand for finish.

 

Is this external as weather protection and internal?

Is it a conversion or just staying as a church? If a conversion how are you insulating?