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Plastering & Rendering

Do I need to PVA bare brick to apply Lime Render in and around fireplace opening.

Anonymous user 09/03/2024 - 3.02 PM

Hi guys. As the title suggests. Do I need to PVA bare brick before applying NHL 3.5 render in and around a fireplace builders opening. Or just saturate with water before rendering with the lime. The builders opening will have an active multifuel stove fitted in due course. Thank you. Regards.

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7 Answers

PME PLASTERING

Rating: 5 out of 5
Oxford
With regards to lime plastering you never pva. Good soaking of water will do
Answered14 June 2019
5

Anonymous user

I've never pva bonded brickwork before rendering because pva will reduce suction so the render is more likely to sink & belly. Just brush down the wall to to remove loose mortar & dust then hose down the wall if it's external work then apply your scratch coat.
Answered15 June 2019
5

ADR Property Maintenance

Rating: 5 out of 5
Boston
just clean the dust of & damp the wall down adding anything else will be a waste of time and money when using 3.5. N.H.L. lime render, anything else will stop the wall breathing and create dampness having the opposite effect of what you want to achieve good luck Alex
Answered15 June 2019
3

Ray Akester Plastering Services

Rating: 5 out of 5
Hull
Never use pva ,brush dust off wall then dampen down to reduce suction. Apply scratch coat,wait 48hrs brush down again and re-dampen then apply 2nd coat.
Answered15 June 2019
3

Spreadwell plastering & rendering

Rating: 5 out of 5
East Grinstead
It all depends on how live it is, I would say give it a pva and a sbr slurry mix just so you know it has the stick,And make sure you add hydrated lime to your render mix when doing the fire place
Answered13 June 2019
2

MOM Plastering LTD

Rating: 5 out of 5
Weston Super Mare
no pva .the wall should breathe, so damp down with water or sbr diluted if its really porus. nhl lime is hydraulic lime not hydrated lime . cheers
Answered15 June 2019
2

S.McCann Plastering

Rating: 5 out of 5
Craigavon
I would personally wash wall down leave to dry and then Pva and render
Answered13 June 2019
0