sand/cement vs plasterboard

Joined
25 Jan 2019
Messages
149
Reaction score
2
Country
United Kingdom
I have a gable wall to plastering the living room. The wall has been stripped back to bare brick. It was originally rendered with sand/cement

I have had some quotes and offered the following choices

1. Plasterboard dot and dab and skim coat
2. Render in sand/cement and skim coat

Or maybe I should plaster it with gypsum base coat and skim coat

Any advice
 
Sponsored Links

JohnD

T*ts like coconuts
Joined
15 Nov 2005
Messages
80,053
Reaction score
5,244
Location
South
Country
Cook Islands
I prefer option 2

I live in an area where is is a common regional practice.
 

JohnD

T*ts like coconuts
Joined
15 Nov 2005
Messages
80,053
Reaction score
5,244
Location
South
Country
Cook Islands
If you want internal insulation, do it. Not dot and dab
 
Sponsored Links
Joined
25 Jan 2019
Messages
149
Reaction score
2
Country
United Kingdom
What other options to "hang" a plasterboard on a bare brick wall apart from dot and dab
 

JohnD

T*ts like coconuts
Joined
15 Nov 2005
Messages
80,053
Reaction score
5,244
Location
South
Country
Cook Islands
Drylining, but this would only make sense if you were adding internal wall insulation.

Which is very worthwhile if you have solid brick walls or can't install CWI.
 
Joined
24 Oct 2020
Messages
968
Reaction score
248
Country
United Kingdom
Why was it taken off?
Damp problem?
More information needed.
It's all about insulation these days.
Insulated board fixed with foam then add a few mechanical fixings then skim. Maybe.
 
Joined
25 Jan 2019
Messages
149
Reaction score
2
Country
United Kingdom
Thanks for yourt comments

It is a solid brick wall (not cavity) built 1930's

The artex and plaster underneath was removed, above the picture rail all around the room and all over the ceiling. It was removed because artex contained asbestos and work had to be done to support a chimney so artex would have been disturbed. We are now making good.

The rendered wall is intact below the picture rail

There have been some damp issues at the bottom of the wall. There has been some mould at the top of the wall especially around the window bay area which we assume is due to condensation
 
Joined
15 Sep 2017
Messages
30,486
Reaction score
2,372
Location
S. Uplands
Country
United Kingdom
It is a solid brick wall (not cavity) built 1930's

In which case forget 2 coat plaster - any damp will show.

render + skim - if done with SBR added it will be pretty resistant to damp, however it will transmit cold very well, so condensation is possible.

dot & dab - risk of cold bridging at dabs.

I personally would favour sticking PIR insulation direct to wall, screw 50 x 25 batten flat on the insulation, then fit a VCL and then plasterboard + skim. You can also treat wall, add DPM if you like. It’s worth foil taping the insulation.

By doing that you have a warm wall with no condensation or damp risk. It’s upto you what thickness of insulation, it depends on your interest in thermal efficiency. Even 25mm PIR would eliminate risk of condensation on the internal wall
 
Joined
24 Oct 2020
Messages
968
Reaction score
248
Country
United Kingdom
Sounds like it was lime plaster originally? Gypsum will be a problem if used is my understanding.
Dot and dab may also cause trouble unless you use foam to stick
 
Joined
25 Jan 2019
Messages
149
Reaction score
2
Country
United Kingdom
Thanks for your replies

What does the VCL do. I understand its a vapour barrier. Does it stop penertraing damp or condenstaion or both.

I guess the original plaster was sand/cement/lime (its at least sand/cement). The original plaster above the picture rail (where we have to replace it) there was no signs of penertrating damp. Only condensation around the window bay area


20220912_182553.jpg
 

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.


Are you a trade or supplier? You can create your listing free at DIYnot Local

 
Sponsored Links
Top