I have been on huge jobs where samples have been taken away for analysis.
I have never ever ever heard, read or been told of one single solitary problem where lime has caused any problem whatsoever.
I have never worked with a single plasterer who does not add lime to his gauge, in whatever proportion they prefer.
Lime is sold and used by the pallett load.
I would not pay three times over the price of a regular waterproofer, for Sika.
Sika have specialised products I do use, but not waterproofer.
I will check out the specifics on lime from the website of the manufacturer.
I accept there may be instances in specialised applications where lime MAY have an adverse effect but for everyday use then never ever a problem.
Seems you have wasted a good many years labouring under a misaprehension ....
I've been wasted for many years, it's true!
I'm not arguing against the benefit of lime at all , I've prpbably posted here before about how to use it rendering and if it has no effect on waterproofing I'll be delighted to know that for sure.
To take your points, which are all well made -
I have comleted tens of thousands of mtr's of rendering and always but always used lime in the mix with or without waterproofer.
Not doubting you at all, but were they all waterproofing jobs. I assume not if the waterproofer was optional
I have undertaken jobs where specifics of the schedule have specifically started the ratios of mix aslways with lime.
Tanking jobs or ordinary render?
I have been on huge jobs where samples have been taken away for analysis. Does size matter
? Were they tanked?
I have never ever ever heard, read or been told of one single solitary problem where lime has caused any problem whatsoever.
If a tree falls in the forest and there is nobody there to hear it .......
I have never worked with a single plasterer who does not add lime to his gauge, in whatever proportion they prefer.
Not really relevant to the technical question though?
Lime is sold and used by the pallett load.
Of course it is, it's used in lime renders and mortars, but again not really an argument as to whether it has a effect on waterproofing
I would not pay three times over the price of a regular waterproofer, for Sika.
Neither would I, unless it was specified! And if any additive could do with the help of lime, it is Sika, but again, hardly a technical comment
I will check out the specifics on lime from the website of the manufacturer.
Let me know which one, because I get a lot of 6:1 sand : lime for rendering, and would be happer if I could use it for waterproofing /tanking too. I add waterproofer to it for ordinary render, because it is a nice admix, gives it body and cost a few pence per metre - I'm not anti lime, just want to learn the reasons for and against!
I accept there may be instances in specialised applications where lime MAY have an adverse effect but for everyday use then never ever a problem. We are not talking about everyday use here, we are talking about making something watertight. If there may be adverse effects, and a good waterproofer will give decent workability, then why introduce the lime in the base coat ? What purpose is it serving? Use it in the top coat for finishing.
I am enjoying the argument, and I am sure there are waterproofers out there in the 21st century that lime will not adversely affect, I just want to learn the facts about it.
I suppose another reason might be that lime improves breathability, which is the opposite of impenetrability(sp), the requirement for tanking.