Restoration & Refurbishment Question

Best practice to plaster wet but drying walls

I've got an old house to renovate that has had the guttering leaking for along time and it has made the brickwork damp on both sides no mould just quite damp, I'm getting it repointed on the outside and plastered on the inside and the builder has said it will dry out no problem now the gutter has been fixed, ( got about 6 to 8 weeks b4 work starts ) he talking about dot and dabbing the boards up, is this the right practise for this scenario?

3 Answers

I've been plastering for 37 years Dot & Dab is not the ideal way to do it. 1 bag of plasterboard adhesive should do 1 whole board but a lot of dry liners stretch 1 bag to 2 boards. Dot & Dab is a quick way but it can have a short term life and can start springing from the wall over time. My personal preference is Basecoat Plaster, the only place I would use plasterboard is on ceiling joists and stud walls (wooden frame) as the boards are screwed and the screws have to be 3 times the length of the thickness of the boards.
Hope this opinion is helpful. Ian

Answered 28th Feb 2013

Ian Masters Plastering Services

Member since 27 Feb 2013

personally I would recommend hacking off the existing internal plaster then rendering with sand & cement waterproof mortar leave at least 7 days to cure then 2coat finishing plaster

Answered 28th Feb 2013

chris collier

Member since 7 Nov 2012

No, it is not!! It takes months for a solid brick wall to dry out. You will without doubt get patches of damp everywhere there is a dab. There are several solutions, the best is using foil lined plasterboard, which in fact is best used on outside walls of an old house anyway. There are several ways to fix this when you have a damp wall, the way we do is to use a hybrid adhesive, this is water proof and also sticks to damp surfaces and foil. There is then no way for the damp wall to affect the plaster board. It is more expensive of course , but is quick and works extremely well, and that is what you need. You could also use insulated plaster board, but I assume it must line up with other plasterboard on the same wall. Hope this helps.


Paul Albright

Answered 1st Mar 2013

Aspire Housing

Member since 23 Nov 2011

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