Strange paint bubbles on pained kitchen wall? what are they?

Ruski

That's a damp wall.. no amount of filling and undercoating will sort that out I'm afraid.

You need to sort out the source of the damp first.

HTH

Russ

lovinituk

As above, looks like very damp plaster.

DaftyDuck

Would agree with above, 80%. 20% possibility it's an old grease stain from the cooker. Less likely, but possible.

Edit: now on computer, so can look more closely. It's a fan oven, isn't it? So, it's continually blowing warm, damp, greasy air out of the vent at the top, and onto the cold outside wall. Hence the intensity of the mark is worst towards the cooker (but not right next to it, as that bit is nicely warmed-up.

I'd make it 60:40 now that the source is the cooker, not penetrating damp. Mind you, I'd still check outside for any damaged downpipes/gutters, and check the sealant on that window

blackcloud

Turned out that the cooker fan was not pumping the heat outside, so I have just had workmen in who have drilled a masive hole in the wall so that the warm/moist air now goes outside from the cooker. All this time I had been using the fan on the cooker not knowing it was actually pointless.

So now the problem should be solved.

Now what do I do in terms of what do I need to paint with

Is there a certain type of paint of oil primmer for hardboard

Do I just use white paint or white paint and primmer and gloss? or I have read that I may need to undercoat it but what does undercoat mean?

What type of paint should I use? etc?

cOULD I just use a paint brush or is there a certain type of brush I need to use?

Should I put like a damp healer or something on the hardboard?

DaftyDuck

Err do you mean the cooker hood fan? The cooker fan just circulates air within the oven...

Use the cooker hood, which should be connected to the hole you mention via ducting.

If it is a damp/grease mark, clean it first with biological washing powder, followed by sugar soap. Paint with stain block. You can use oil based primer/undercoat, but it's no cheaper, and less effective. Then use ordinary emulsion (wall) paint, and finish with kitchen emulsion paint (or just use the latter). Gloss is for bare wood.

blackcloud

Yes the cooker hood fan was pointless as it was just blowing warm air around the kitchen. Now the workmen have but a big hole in wall of kitchen which leads to outside. So a big round piece of concrete has been left for me to throw away. Anyhow, I have been told the moisure in the kitchen issue has now been resloved. What a difference that has made. Before they did that water would be dripping down the wall where those air bubbles were on the picture while cooking. Now theres no water dripping down the walls when cooking at all!!!

So problem solved.

So now I just need to

a) If its a damp/grease mark (which it looks like it is) clean it first with biological washing powder,

https://www.persil.co.uk/wp-content/uploads/2014/01/Persil-Laundry-Powder-Bio-500x500.jpg

b) followed by sugar soap.

http://www.ebay.co.uk/itm/Everbuild-Sugar-Soap-Liquid-Concentrate-500ml-Cleaner-Grease-Stains-Grime-Cleans-/172125176725?hash=item281375c395:g:FcwAAOSwZ8ZW3T6U

c) Paint with stain block or use an oil based primer/undercoat, but it's no cheaper, and less effective.

http://www.ebay.co.uk/itm/Stain-Block-Paint-for-Covering-Damp-and-Mould-Patches-on-Walls-and-Celings-250ml-/310795622436?hash=item485cdcd824:g:B1oAAMXQV0BSIKKi

d) Then use ordinary emulsion (wall) paint, and finish with kitchen emulsion paint (or just use the latter). Gloss is for bare wood.

http://www.ebay.co.uk/itm/Crown-SILK-Emulsion-7-5-L-Pure-Brilliant-White-Wall-Ceiling-Paint-Wipeable-/161990929494?hash=item25b7696c56:g:jz0AAOSw-nZTpCef

I have noticed around some of the edges the paint is not sticking to the wall, should I pull those parts off? Most of the edges of the paint are stuck tight to the wall and I really would have to scrape it off, but some edges are loose, should I pull those away until I reach a part where the paint is stuck tight to the wall or should I just leave it?

What would be the best type of paint brush for this? Maybe these?

http://www.ebay.co.uk/itm/Harris-T-Class-Delta-Paint-Roller-Kit-Set-6-Sleeve-Trade-Pack-9-/221796552069?hash=item33a41acd85:g:DHsAAOSwpRRWoBS0

Do you think I can get all those things from poundland? or Poundstrecher?

DaftyDuck

I do hope the cooker hood has been fitted with trunking to connect to this exciting new hole you now have...

But, the grease needs to be cleaned from the wall before repainting. You can buy all the stuff you might need from a Poundshop, probably.

I'd venture to an ordinary supermarket for biological washing powder, where it may be a larger packet, but will be cheaper (or use some of the stuff you use for washing - even if not biological). Ownbrand will do, so no need to splash out on Persil. Sugar soap isn't vital, but that definitely is sold in poundshops, so that'll save £2.25.

You won't need much emulsion if you are just patching that bit, maybe a litre. I have no idea if poundshops sell that in smaller pots.

However, I do believe ALDI are selling everything you need this Sunday - even damp seal.

Now all you need is trunking to connect the hood to the hole!

blackcloud

Thanks, I will do that.

I need to ask I have noticed around some of the edges the paint is not sticking to the wall, should I pull those parts off? Most of the edges of the paint are stuck tight to the wall and I really would have to scrape it off, but some edges are loose, should I pull those away until I reach a part where the paint is stuck tight to the wall or should I just leave it?

Heres a picture of the cooker hood

http://postimg.org/image/e00xxqw0n/

However, I do believe ALDI are selling everything you need this Sunday - even damp seal.

only this Sunday?

lovinituk

Is it really hardboard?! Looks like plaster from the photos.

blackcloud

Is it really hardboard?! Looks like plaster from the photos.

Im not sure, how can I tell? will that change the type of paint I use or anything?