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  • FIRST POST
    • Fairenuff
    • By Fairenuff 19th Dec 17, 9:34 AM
    • 47Posts
    • 56Thanks
    Fairenuff
    Black mould on ceiling
    • #1
    • 19th Dec 17, 9:34 AM
    Black mould on ceiling 19th Dec 17 at 9:34 AM
    I have black mould on the ceiling above my shower, we had the bathroom refurbished in July so ceiling was painted,we have an extractor fan that comes on when you put the light on and I open the window daily so my question is two fold how di I get rid of the mould and how do I stop it recurring? Thanks X
    Last edited by Fairenuff; 19-12-2017 at 9:35 AM. Reason: Bad grammar
Page 1
    • andrewmp
    • By andrewmp 19th Dec 17, 9:37 AM
    • 1,574 Posts
    • 811 Thanks
    andrewmp
    • #2
    • 19th Dec 17, 9:37 AM
    • #2
    • 19th Dec 17, 9:37 AM
    I have black mould on the ceiling above my shower, we had the bathroom refurbished in July so ceiling was painted,we have an extractor fan that comes on when you put the light on and I open the window daily so my question is two fold how di I get rid of the mould and how do I stop it recurring? Thanks X
    Originally posted by Fairenuff
    Do you use a squeegy thing on the tiles/shower screen, that can help, or better still, a window vac? Other than that, keep the window open more. Having recently had an extractor fan fitted, I've found they're pretty useless and wish I hadn't bothered now. Haven't had any mould though since August.
    • spadoosh
    • By spadoosh 19th Dec 17, 9:46 AM
    • 5,190 Posts
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    spadoosh
    • #3
    • 19th Dec 17, 9:46 AM
    • #3
    • 19th Dec 17, 9:46 AM
    Getting rid of it is pretty easy. You can buy various types of mould spray but being a money saving website in essence the products is a diluted bleach mix. Scrubbinf brush and bleach mixture should get rid of most of the black marks. There might be some discolouration of the paint which you might want to touch up.

    As for stopping it coming back, theres a few ways. It sounds like your extractor is inadequate (its clearly not extrating enough water to prevent mould growth) so you could get a second or more powerful extractor fan. The other option is to go for a different style of fan, you can get one with moisture detection that stay on until it believes the moisture levels in the room have dropped enough as opposed to switch operated.

    A more temporary, temporarily cheaper fix is to increase the temperature of the ceiling of the room. Usually quite easily achieved by removing any loft insulation above your bathroom. (mould appears less common on ground floors as there usually somewhere warm above it that stops the moisture condensing. Obviously your house will be less insulated and colder but it costs nothing immediately and no expertise required.

    Always worth using a decent paint on ceilings in bathrooms too. Something like zinnser but paint last, no point overpainting it until the problems solved. Id imagine most of the problems will go away come spring time anyway but unless you solve the ventilation issue itll be a yearly occurrence.
    Don't be angry!
    • spadoosh
    • By spadoosh 19th Dec 17, 9:56 AM
    • 5,190 Posts
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    spadoosh
    • #4
    • 19th Dec 17, 9:56 AM
    • #4
    • 19th Dec 17, 9:56 AM
    Do you use a squeegy thing on the tiles/shower screen, that can help, or better still, a window vac? Other than that, keep the window open more. Having recently had an extractor fan fitted, I've found they're pretty useless and wish I hadn't bothered now. Haven't had any mould though since August.
    Originally posted by andrewmp
    Extractor fans are really effective. Most of the time if there is an inadequate extractor fan its usually down to not buying the right product for the job. What criteria was used when selecting the extractor fan or was it just a bob down to b&q and buy the cheapest, easiest to fit?
    Don't be angry!
    • Aylesbury Duck
    • By Aylesbury Duck 19th Dec 17, 10:02 AM
    • 1,992 Posts
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    Aylesbury Duck
    • #5
    • 19th Dec 17, 10:02 AM
    • #5
    • 19th Dec 17, 10:02 AM
    ^^ This. The cheapest fan kits are about £30 and are woefully underpowered. I bought separate ducting and switching and bought a decent fan from Toolstation for £60. All told it came to £80 but it's lasted 5 years to date and has a really good pull on it. No condensation at all.
    • TheCyclingProgrammer
    • By TheCyclingProgrammer 19th Dec 17, 12:14 PM
    • 3,173 Posts
    • 1,851 Thanks
    TheCyclingProgrammer
    • #6
    • 19th Dec 17, 12:14 PM
    • #6
    • 19th Dec 17, 12:14 PM
    As well as an extra for, we issued Zinsser Permawhite on our shower room ceiling and haven!!!8217;t had a single spot of mould in two years.
    • rach_k
    • By rach_k 19th Dec 17, 12:54 PM
    • 1,253 Posts
    • 2,149 Thanks
    rach_k
    • #7
    • 19th Dec 17, 12:54 PM
    • #7
    • 19th Dec 17, 12:54 PM
    I'd use HG Mould Spray. You can mess around diluting bleach or whatever but it won't be as effective as just buying the spray and using it according to the instructions.
    • spadoosh
    • By spadoosh 19th Dec 17, 1:04 PM
    • 5,190 Posts
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    spadoosh
    • #8
    • 19th Dec 17, 1:04 PM
    • #8
    • 19th Dec 17, 1:04 PM
    I'd use HG Mould Spray. You can mess around diluting bleach or whatever but it won't be as effective as just buying the spray and using it according to the instructions.
    Originally posted by rach_k
    Tried it?

    According to the product sheet, the HG mould spray ingredients consist of the following ingredients:

    Water
    Sodium hypochlorite (concentration approximately 3%) this is effectively bleach
    Sodium hydroxide (concentration approximately 1%) this is a powerful corrosive alkaline.
    So their special ingredient is a tiny amount of caustic soda. Your paying ~£5 for about 15 ml of bleach, 5 grams (assuming 1ml = 1 gram) of caustic soda and a spray bottle.
    Don't be angry!
    • rach_k
    • By rach_k 19th Dec 17, 2:33 PM
    • 1,253 Posts
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    rach_k
    • #9
    • 19th Dec 17, 2:33 PM
    • #9
    • 19th Dec 17, 2:33 PM
    Tried it?



    So their special ingredient is a tiny amount of caustic soda. Your paying ~£5 for about 15 ml of bleach, 5 grams (assuming 1ml = 1 gram) of caustic soda and a spray bottle.
    Originally posted by spadoosh
    Yes, I have tried both and the mould spray is more effective than bleach alone. It's all very well saying 1% is a tiny amount but so is the 3% bleach. That combined 4% is more effective than standard bleach. If you want to go mixing it up yourself, go for it. I'd prefer to buy it rather than mess around with chemicals I don't particularly understand, and although this is a money saving site, £5 is hardly bank-breaking for a product that works.
    • Lorian
    • By Lorian 19th Dec 17, 2:41 PM
    • 4,358 Posts
    • 2,478 Thanks
    Lorian
    Extend the run-on period on the existing fan, and make sure you have at least trickle vents open.
    • spadoosh
    • By spadoosh 19th Dec 17, 3:59 PM
    • 5,190 Posts
    • 6,994 Thanks
    spadoosh
    Yes, I have tried both and the mould spray is more effective than bleach alone. It's all very well saying 1% is a tiny amount but so is the 3% bleach. That combined 4% is more effective than standard bleach. If you want to go mixing it up yourself, go for it. I'd prefer to buy it rather than mess around with chemicals I don't particularly understand, and although this is a money saving site, £5 is hardly bank-breaking for a product that works.
    Originally posted by rach_k
    I gave a money saving option. One that works effectively enough to remove mould. One that the op prbably has available in their house to at least give it a go before deciding they need to pay a premium for a teaspoon of caustic soda.

    You seem to have countered that with ignorance and inconvenient convenience (going to the shop to buy a bottle of what is practically already beneath your sink). Youre welcome to do that but i dont think mixing bleach and water is messing around (its the same mixture i use to mop my floors) going to the shop to buy a bottle of really expensive bleach water with a bit of caustic soda chucked in is, i think, messing around.

    Youre paying ~£5 for 1/2 l of mop bucket water!!!! I bet you buy evian.
    Don't be angry!
    • newatc
    • By newatc 19th Dec 17, 4:34 PM
    • 248 Posts
    • 281 Thanks
    newatc
    Don't be angry!
    • spadoosh
    • By spadoosh 19th Dec 17, 4:39 PM
    • 5,190 Posts
    • 6,994 Thanks
    spadoosh
    Don't be angry!
    Originally posted by newatc
    Im not, im incredulous.

    My anger is reserved for people asking if theyre FTB'ers.
    Don't be angry!
    • Fairenuff
    • By Fairenuff 19th Dec 17, 4:56 PM
    • 47 Posts
    • 56 Thanks
    Fairenuff
    Wow thanks everyone for your prompt replies , the extractor fan cost us about £190 builders fitted it ,we are now going to have a Humidistat extractor fitted (after Christmas !) I will wash down with mild bleach and between Christmas and New Year re paint as advised Thank you all and Merry Christmas x
    • rach_k
    • By rach_k 19th Dec 17, 6:24 PM
    • 1,253 Posts
    • 2,149 Thanks
    rach_k
    I gave a money saving option. One that works effectively enough to remove mould. One that the op prbably has available in their house to at least give it a go before deciding they need to pay a premium for a teaspoon of caustic soda.

    You seem to have countered that with ignorance and inconvenient convenience (going to the shop to buy a bottle of what is practically already beneath your sink). Youre welcome to do that but i dont think mixing bleach and water is messing around (its the same mixture i use to mop my floors) going to the shop to buy a bottle of really expensive bleach water with a bit of caustic soda chucked in is, i think, messing around.

    Youre paying ~£5 for 1/2 l of mop bucket water!!!! I bet you buy evian.
    Originally posted by spadoosh
    Wow, you're quite rude.

    Bleach alone doesn't kill mould spores. It will bleach the black spots visible on the surface but won't stop it coming back. HG mould spray (and probably other brands, that's just the one I happen to have used) prevents it coming back for much longer. If you want an equivalent to the mould spray, you'd have to mix up the same ingredients but I don't fancy messing around with caustic soda myself. You can bleach regularly if you like and live with knowing that you're just fading the colour but I prefer to kill it once and know it won't be back any time soon. That's personal preference - we all have them so no need to be so snarky about it. Do bear in mind that a 'solution' that doesn't actually work isn't money saving.
    • George Michael
    • By George Michael 19th Dec 17, 11:10 PM
    • 3,086 Posts
    • 4,154 Thanks
    George Michael
    Bleach alone doesn't kill mould spores. It will bleach the black spots visible on the surface but won't stop it coming back.
    Originally posted by rach_k
    In many cases, bleach will totally kill off the mould, especially on non porus surfaces so if the paint used in the OP's bathroom is waterproof, bleach will do the job perfectly well.
    http://blacktoxicmolds.com/bleach-kill-mold.php

    Just a couple of websites out of many.
    Does Bleach Kill Mold
    Bleach kills bacteria and viruses and sanitizes the surfaces it's used on. Bleach also kills mold if it comes into contact with it. The spores and allergens from mold are neutralized as well.

    Bleach will kill mold growing on non-porous surfaces like glass, tiles, bathtubs and counter tops. However bleach cannot completely kill mold growing in non-porous materials like drywall and wood. Bleach does not penetrate into these non-porous substances and so only the mold growing above the surface is killed
    http://moldpedia.com/mold-removal

    Bleach can kill virtually every species of indoor mold that it comes into contact with, along with its spores, leaving a surface sanitized and resistant to future mold growth.
    • UncleZen
    • By UncleZen 20th Dec 17, 11:45 AM
    • 598 Posts
    • 211 Thanks
    UncleZen
    x2 for HG Mould spray.
    It's worked a treat in our en-suite. Well worth the £4.39 or whatever it was from the DIY shed.
    • GeorgeBatesUK
    • By GeorgeBatesUK 8th Jan 18, 3:18 PM
    • 2 Posts
    • 0 Thanks
    GeorgeBatesUK
    Interesting read. Thanks for the comments.

    I've heard that Anti Mould Paint is worth a try? What do you guys reckon? I just got the cheapest Ronseal one from B & Q and will try it at the weekend. Has anyone had any success with this?

    Cheers
    • smudger1964
    • By smudger1964 8th Jan 18, 4:57 PM
    • 632 Posts
    • 261 Thanks
    smudger1964
    Lidl are doing some very good mould cleaner and paint this week
    https://www.lidl.co.uk/en/Non-Food-Offers.htm?articleId=9504&ar=12
    https://www.lidl.co.uk/en/Non-Food-Offers.htm?articleId=9505&ar=12
    https://www.lidl.co.uk/en/Non-Food-Offers.htm?articleId=9503&ar=12
    https://www.lidl.co.uk/en/Non-Food-Offers.htm?articleId=9506&ar=12
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