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only the top coat had lime, the sand was plastering sand from wicks, seems to be a good grade, but what do I know.

Yes they did wet the wall down well, it did seem to suck up the lime in the mix they said and more water was added as they went along no added plasticiser was used though. I was also wondering if it was likely more cracks would appear as time goes on and could they get bigger? :confused:

the scratch coat was left on for 3 days

rendered onto exterior brick wall

Just had an exterior wall rendered with 4-1-1 scratchcoat with waterproofer and 5-1-1 topcoat one day on and i`ve noticed some small hairline cracks and some other very slight spider webb type cracking. Any suggestions on the possible cause and remedy please.:-0

Thanks Henry, what is the waterproof pva used for anyway and do you think it best to continue the rest of the walls without any pva?

:RpS_scared:I have started to render an exterior wall and used a normal unibond to prime the wall before applying the the scratcoat 4-1 with an addmixture of waterproofer, I have been told that because the unibond is not a waterproof type that it could lead to problems with integrity of the...

planning on rendering exterior wall with sand/cement/ hydrated lime 4-1-1 scratchcoat and 5-1-1 top coat, wondering if it is usual practice to include a waterproofer additive in one or both coats. appreciate any advise. :confused:

Thanks everyone for the advise

Does anyone have any advise on the use of snowcrete,I plan to use snowcrete white cement with lime as a top coat with ordinary portland cement as the scratch coat to get a lighter natural shade(cream or similar) scratchcoat 4-1-1 and top coat 5-1-1 with waterproofer in both coats. the only sand...

Thanks for the advise , I live in the telford area shropshire.:RpS_cool:

Hi there, I am new to the forum and would like some advise on the best prodedure for rendering a an external wall whick has mostly dense bricks.I have keyed up the bricks with a grinder to form criss cross all over as I was told they might be too smooth a surface. when getting estimates for the...