Mold/mildew removal before painting.

cosmowillie53

I have several fairly bad patches of mold/mildew on kitchen wall particularly in the corners. I know I will have to deal with the cause of the problem before painting .
What is the best way to kill of the mold and keep any staining from coming through the paint.
Should I use any particular paint .
Thanks.

slimjimmc

Kill the mould with 5:1 water:bleach or a dedicated mould killer spray.
Once the mould is killed and washed off, and the underlying cause corrected then I don't see why you would have staining.

oisinbutler

cosmowillie53 wrote: »

I have several fairly bad patches of mold/mildew on kitchen wall particularly in the corners. I know I will have to deal with the cause of the problem before painting .
What is the best way to kill of the mold and keep any staining from coming through the paint.
Should I use any particular paint .
Thanks.

Kill the mould with some bleach added to water 3:1 water to bleach. Scrub what you can away then soak whats left with your watered down bleach solution and leave for at least half an hour before cleaning away again. The bleach needs a little soaking time to kill the mould. Leave the bleach on over night if its an option. When painting again you can use a mould block on the affected areas first to stop any surviving mould coming through the paint. You can also add mould inhibitor to your emulsion paint which will help stop it coming back or use an anti mould paint.

cosmowillie53

Thanks for the info folks.

air

Ive found a great way of keeping the bleach in contact with the affected areas is to make up your bleach mixture & dip toilet roll in it and plaster this on.
The tissue will stick to the surface and won't dry out for at least a few hours unlike bleach that is just applied.
This gives amazing results for almost zero work, especially effective on really tough stuff like tile grout etc. Once you tackle the source of the excess humidity afterwards with improved ventilation or a dehumidifier you should have no issues with reoccurrence.

michael999999

air wrote: »

Ive found a great way of keeping the bleach in contact with the affected areas is to make up your bleach mixture & dip toilet roll in it and plaster this on.
The tissue will stick to the surface and won't dry out for at least a few hours unlike bleach that is just applied.
This gives amazing results for almost zero work, especially effective on really tough stuff poke tile grout etc. Once you tackle the source of the excess humidity afterwards with improved ventilation or a dehumidifier you should have no issues with reoccurrence.

That may be alright on tiles, but I wouldn't recommend it on painted walls. If the walls are slabbed you don't want it to be soaking up water containing bleach.

Wipe the affected area down with a rag and some water and a drop of bleach.

Then give the walls a couple of coats of Zinsser anti mould/mildew, mixed to the Ral you want.

oisinbutler

michael999999 wrote: »

That may be alright on tiles, but I wouldn't recommend it on painted walls. If the walls are slabbed you don't want it to be soaking up water containing bleach.

Wipe the affected area down with a rag and some water and a drop of bleach.

Then give the walls a couple of coats of Zinsser anti mould/mildew, mixed to the Ral you want.

Hey Michael, I was using the Zinsser permawhite quite a bit but am now leaning towards using Mouldx products. Do you have any experience with this stuff and if so whats your opinion of it?

michael999999

oisinbutler wrote: »

Hey Michael, I was using the Zinsser permawhite quite a bit but am now leaning towards using Mouldx products. Do you have any experience with this stuff and if so whats your opinion of it?

Never used it. I used permawhite on my en- suite 7 years ago, and its still perfect. So I have tended to stay using it on all jobs. Its tintable aswell, which is handy.

You can buy a gallon of white, do the bathroom ceiling. Then take back whatever is left and get the color added for the walls.

Stella Virgo

cosmowillie53 wrote: »

I have several fairly bad patches of mold/mildew on kitchen wall particularly in the corners. I know I will have to deal with the cause of the problem before painting .
What is the best way to kill of the mold and keep any staining from coming through the paint.
Should I use any particular paint .
Thanks.

buy "mr muscle" (green spray container) mould and mildew remover.available in most large supermarkets . it will shift it in a few minutes...

oisinbutler

michael999999 wrote: »

Never used it. I used permawhite on my en- suite 7 years ago, and its still perfect. So I have tended to stay using it on all jobs. Its tintable aswell, which is handy.

You can buy a gallon of white, do the bathroom ceiling. Then take back whatever is left and get the color added for the walls.

Thats exactly what I used to do with it. Most bathrooms ceilings are pretty small and a gallon goes quite far so you can use it again on the next job. To be fair I only ever had one bad experience with permawhite and it wasn't the paints fault.
Good to hear your en-suite is still looking good 7 years later, thats enough for me.
Thanks

corkgsxr

Gloss white is better than most stain/mould blocks.

One or 2 coats then away with whatever colour you want

michael999999

corkgsxr wrote: »

Gloss white is better than most stain/mould blocks.

One or 2 coats then away with whatever colour you want

Jesus no.

How do you think emulsion is going to cover gloss.

oisinbutler

corkgsxr wrote: »

Gloss white is better than most stain/mould blocks.

One or 2 coats then away with whatever colour you want

You'd need to sand the gloss right back in order to get the emulsion to stick to it properly. Sounds like a lot of work to me