Internal sand and cement render - could I use a darby for it?

Joined
5 Oct 2021
Messages
12
Reaction score
0
Country
United Kingdom
Hi, I was just wondering if anybody could offer me any advice. I live in an old 30s/40s terraced house and I recently cross-lined the walls of my living room with lining paper with a view to wallpapering/painting. However, I haven't finished the job as the weather meant there were some outside jobs I had to do. In the meantime, it has become apparent that damp from the chimney breast wall has caused some of the paper on that wall to come loose and in some cases actually be a little moist. Now, I could tap the wall in lots of areas and know the plaster was loose, but I was hoping to get away with not dealing with the problem this time around. However, it does not appear that it was meant to be.

I had a similar issue in the same room on the opposite wall a couple of years back, hollow sounding section about 1m x 4m, so I bashed it off and applied an internal sand and cement render then skimmed it. It was okay and I am fairly confident at skimming but what I am not confident about is internal rendering of a space as large as a full wall (although, being a chimney breast wall, it is split into five more manageable sections).

Before a plasterer I work with advised me to use sand and cement (I'd forgotten I'd done it on the other wall), I was hoping to apply a backing plaster with a darby. However, the plasterer told me that any backing plaster will suck moisture up like nobody's business, so it's back to the sand and cement. The question is - is it acceptable to use a darby with battens/grounds to achieve a level finish? One possible issue I can see (aside from doing each coat in stages when the battens are removed) is, after the scratch coat is done, I am then trying to affix the batten to the scratch coat to do the top coat... especially since the scratch coat will be scratched up and therefore the batten may not sit flush. If it was just one coat like applying backing plaster I wouldn't care but it's the two coat issue that's puzzling me.

Just wondered if anybody could tell me whether it's all feasible or a big no-no. Thanks!
 
Sponsored Links
Joined
30 Jun 2021
Messages
843
Reaction score
167
Country
United Kingdom
Pics showing the interior wall and the chimney breast, and pics of the outside of the wall and if possible a pic of the chimney stack? Pics will help quite a bit.
 

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