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DIY or getting someone in? A pro company should be able to answer most questions when they quote, I think there's a new building Reg that requires cavity insulation if adding render. The bits that I've done recently used a mix of 6:1:1 sharp sand, hydrated lime & Portland cement, I read many problems stem from using too strong a cement mix. I didn't use SBR or a waterproofer as apparently this can react with the lime, I used Cementone exterior render primer that was £100 a tub!
We are also keeping our concrete tiles, reminds me I need to jet wash the moss, liking the copper tip.
Not sure it's relevant but the sharp sand I used had pebbles that were just too big which made a mess when floating, I've been doing the inside of the bedroom this week and found 'plasterers sand' which is somewhere in between sharp and soft and spread/floated so much better.
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inchpincher
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Thanks, man - very helpful. Are you a pro? Want a job?! Definitely not doing it myself!
There is so much contradictory information and opinion out there. I read recently that there is little benefit from putting insulation into an existing cavity wall, and it can cause condensation/ damp internally. Local builder does sand and cement render and the price is reasonable, but I am also interested in the modern colour-injected, self-cleaning stuff for a hassle-free future...
Timmy2wheels
Has anyone had their brick house rendered? Thinking about doing ours, not because the brickwork is in bad shape, but for aesthetic reasons. Sand and cement vs monocouche? Any issues to think about? And would the keeping existing concrete tiled roof, covered in lichen and moss, ruin everything? MANY QUESTIONS.