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https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl DIY Forum >> Painting, Decorating & Tiling Questions >> painting over re-occuring mould https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num=1222188887 Message started by robb6879 on Sep 23^rd, 2008, 5:54pm

Title: painting over re-occuring mould
Post by robb6879 on Sep 23^rd, 2008, 5:54pm

i'm painting a ceiling in a bathroom that always tends to have constant mould growth on it. the extractor is in use but it is a very tamp flat. i'll wash with bleach before i get started and use some generic anti mould growth paint but does anyone have any insider knowledge how to make this a less regular occurance (as i'm sure many of you know the specialist paints only do a certain amount!)
many thanks and i look forward to your thoughts!

Title: Re: painting over re-occuring mould
Post by CWatters on Sep 23^rd, 2008, 8:07pm

Make sure air can get into the bathroom as well as out through the fan. Possibly insulate the ceiling if you can get access.

Title: Re: painting over re-occuring mould
Post by hamilton on Sep 25^th, 2008, 11:11am

Try using acrylic eggshell instead of emulsion. This should keep any mould to a minimum and if you do get any, it is much easier to wipe off.

Title: Re: painting over re-occuring mould
Post by Lectrician on Oct 4^th, 2008, 9:43pm

I agree with the above.

You need 'passive intake' as a balance to a fan thats extracting. If it just sucking ona vacume, it will not extract. If it is sucking and pulling new air into the room, it will shift the moist air out.

Taking a little of the bottom of the door, or fitting a grill to a wall or door will allow air into the room when the extractor is running.

Mould is caused by damp air condensating on walls and ceilings. A cold wall or ceiling will cause the moist air to condensate. Insulating the walls and ceiling well will help this issue.

You obviously also need to ensure you air the room - open windows regularly. Keeping the room warm helps too.

Title: Re: painting over re-occuring mould
Post by hamilton on Oct 8^th, 2008, 1:58pm

I didn't have that trouble when I was a kid. We had a zinc bath hanging on the copperhouse door and bathed in the garden in summer and the living room in the winter.
The house was so draughty that there was no chance of condensation.

So many people block up their vents to stop the draught, and then the problems start.