Uninsulated Brick wall plastering

Question

Hi.
Looking at getting my external walls replastered on the inside, the original horsehair lime plaster is coming away as we've replaced the windows. 
What would tradespeople recommend to replace with? I am hesitant to use hardwall due to the fact its a double brick skin and will carry some moisture naturally and needs to breathe. 
I have found this product: https://proofshield.co.uk/product/prooftherm-insulating-render-plaster/ which we are considering using
Thanks

Lee · Accepted Answer

Hi Charlie 
I would use a dry zone dpm black paint. Ie damp course. Stops any moisture or damp coming though Then I would use moisture boards. With dry zone ashdive , Make sure they’re not bridged. Then skim.
Thanks

Daniel · Answer

for this work you would need to go down the iwi route either with battoning the wall out or a stud wall in front

Robert · Answer

Depending on the state of the brickwork 2 coats waterproof sand cement with hydrated lime would be the best choice

Ian · Answer

Use dryzone for injections.  Moisture resistant boards and dryzone mastic for application for boards.

Roy · Answer

Soft sand and cement with washed sharp and lime hard wall and bonding can course damp

Lee · Answer

Dont use a gypsum based backing coat on a lime based original wall, it's not breathable, I recommend using sand cement lime. To keep it breathable. As I havent got any pictures to go off or cant see the substrate in person hard to give a full accurate description but hope this helps.

Ryan · Answer

Hi we have just done 1 in warmshell products which is a fibre board and lime based plaster so a more breathable material.

See link below;
https://www.lime-green.co.uk/warmshell

Christopher · Answer

If at all possible and cost effective, it may be better to take out the effected walls and dot/dab to the brick but better still, stud out and board as this will allow it to breath and the finish will be much better.
It all depends on cost and the finish you require.

Uninsulated Brick wall plastering

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