Wall Paint Option

[yartin]

Hi

I am painting a rental property; outside walls don't have cavity, without sufficient heating and ventilation are prone to condensation and mould in the winter months. They were painted with Dulux Vinyl silk then tried Dulux bathroom sheen paint but neither solved the issue. The builder is going to sand the walls first and apply primer. Am I better of with matt emulsion for top coat? Any recommendations?

Thanks

 

[Wayners]

Should have breathable paint as it's probably lime plaster on walls
Now you have vinyl paints on the walls you may get trouble as it seals surfaces.
Read up.

 

[yartin]

It's not lime plaster, skimmed 10years ago, gypsum

 

[Wayners]

No cavity and it's gypsum plaster.
That's a problem as gypsum traps moisture.
There are systems like stud and plasterboard, or board fixed with foam then walls can be skimmed with gypsum.
What system do you have?

 

[yartin]

Plastered solid brick wall

 

[Wayners]

Limelite or lime plaster?
You thinking it's just standard gypsum?

 

[opps]

No cavity and it's gypsum plaster.
That's a problem as gypsum traps moisture.
There are systems like stud and plasterboard, or board fixed with foam then walls can be skimmed with gypsum.
What system do you have?

Most of my work is in west London, houses with solid 9" walls. Over the years, the interior walls have been re-skimmed with gypsum plaster.

I seldom see problems using regular emulsion paints or wallpaper.

To the OP- Condensation is normally down to a lack of airflow. You could apply waterbased eggshell but the moisture will literally run down the wall and on to the carpet.

 

[yartin]

Most of my work is in west London, houses with solid 9" walls. Over the years, the interior walls have been re-skimmed with gypsum plaster.

I seldom see problems using regular emulsion paints or wallpaper.

To the OP- Condensation is normally down to a lack of airflow. You could apply waterbased eggshell but the moisture will literally run down the wall and on to the carpet.

That's right, rooms need ventilation and heating in winter otherwise condensation leading to mould.
No matter which plaster as is irrelevant.
Tenants want to save on heating bills and it's too cold to open windows.
I will stick to the same paint dulux vinyl silk as before better than matt.

 

[opps]

That's right, rooms need ventilation and heating in winter otherwise condensation leading to mould.
No matter which plaster as is irrelevant.
Tenants want to save on heating bills and it's too cold to open windows.
I will stick to the same paint dulux vinyl silk as before better than matt.

It is a tough call. I understand people not wanting to allow cold air in, but the same people would possibly do so if they had to pay for maintenance.