Re-pointing Thermalite

Joined
17 Oct 2014
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Location
Lincolnshire
Country
United Kingdom
The house we've just bought was built in the early 70s and I guess they didn't know about the problems with render not bonding to Thermalite. Almost all the plaster is blown. If you push against it, it moves and 'crunches':cry: :cry: I've just knocked the render and skim coats off the kitchen walls (it fell off, actually) prior to rebuilding the whole lot. It came off in foot-square lumps, with little more than a tap to join up the cracks. It's a MESS.
Having got it off, there are some cracked blocks and a lot of the pointing is 'gappy'
Taking into account we are trying to live in the place, is there an alternative to playing a hose on the walls before I set about re-pointing?
I'm not going to re-render. It's getting a Jablite/dot-and-dab outer walls and dot-and-dab inner ones.
I just want a sound backing for the new lining - and I saw the suggestion of an extra bit of 'dab' applied around the points where the units will be.
fixed............... which raises another question.............
What are the best type of fixings to use in Thermalite?
Pat'sPatter
 
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