Rendering Finish on 1920’s House

[Build-H]

Hi all,

 

I’m currently renovating a 1920s house, and my architect has specified a silicone render for the exterior. However, after speaking with a few rendering companies, I’ve been advised that larger wall areas could appear uneven when viewed under certain lighting conditions, such as direct sunlight.

 

I’ve decided against using external wall insulation (EWI) due to the extent of modifications it would require.

 

Are there any alternative rendering systems, textures, or finishing techniques that could help minimise the risk of visible unevenness—especially on large surfaces?

 

I’m open to suggestions involving newer materials or coatings as well.

 

Thanks in advance!

[nod]

There talking rubbish

Have you thought of using a rough cast silicone render 

[Build-H]

9 hours ago, nod said:

There talking rubbish

Have you thought of using a rough cast silicone render 

Can you explain why you think they're wrong? I've seen several jobs, even new builds, where surfaces appear uneven or show imperfections under certain lighting.
 

Renderers have told me they aim for flatness, but there are always some system limitations.

 

I’ve considered roughcast silicone render, though I’m unsure if it would help. It can look heavily textured or even dated, which might not suit the aesthetic I’m going for.
 

I'd be open to a larger grain render if it would make a noticeable difference.

[nod]

21 minutes ago, Build-H said:

 

Can you explain why you think they're wrong? I've seen several jobs, even new builds, where surfaces appear uneven or show imperfections under certain lighting.
 

Renderers have told me they aim for flatness, but there are always some system limitations.

 

I’ve considered roughcast silicone render, though I’m unsure if it would help. It can look heavily textured or even dated, which might not suit the aesthetic I’m going for.
 

I'd be open to a larger grain render if it would make a noticeable difference.

I’ve run a render company for the past 30 years and seen hundreds of bumpy jobs done on flat new builds 

There’s no surface that can’t be rendered flat 

Direct sunlight will make even the best surface look bumpy for 30 minutes per day 

[MPH243]

The silicone render on our house looks really good except when the up/down outside lights are on at night and it shows a little,  but I think it is better than a sand cement would be.

 

I am very pleased with it.