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I have a house extension project with new cavity walls, one of which needs to be rendered. I would like to use a breathable render on that surface, can you advise whether that's a good idea, and what Baumit products would be suitable?

 
Chris Brookman
(@chris)
Member Admin
Normally on to brickwork/blockwork I’d suggest the following specification:-
 
Existing masonry
 
This will allow the wall to dry well, keep the weather out and the mesh will reduce the risks of any cracking.This specification is actually more for historic buildings than modern ones but works perfectly well on either. However, the following might be easier for some contractors to work with as it is more familiar to install:-
 
15mm Baumit MP69 lightweight render (spray applied)
 
Cost-wise both are around the same cost per m2 at around £17/m2 + VAT, waste and carriage so it is up to you/the contractor which route they’d prefer to go down.
 
Hope that helps
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Topic starter Posted : 12/03/2021 1:07 pm
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