Old house walls crumbling inside plaster

Question

What’s best for doing up an old house with crumbling plaster inside and flaking ?

Chris · Answer

To repair crumbling old plaster, completely remove all loose material down to the solid base (masonry or wooden lath). Apply a PVA bonding agent or plaster primer. Fill large gaps with bonding plaster, let it cure, and finish with a lightweight ready-mixed joint compound before sanding and painting.
Also depends if lime has been used which can fail after years must use lime again otherwise house will not breathe.

Mark · Answer

Hi , all depends on how bad exciting  plaster is !
If plaster has detached  from wall it will need to be removed , if it’s just old and dry , you could use thistle Bond it , and maybe put full sheets of mesh if walks have lots of cracks ? Thistle Bond it is easy to use wrong as it need a good mix before use .,I tip contents into a larger bucket so mix is easier. Once you have PAINTED walls  with bond it , apply two coat Bonding , and two coat finish plaster. . Hope that helps 👊🏻

Old house walls crumbling inside plaster

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