Is this normal for an outdoor roof?
Is this normal for an outdoor roof?
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Discussion

UTH

Original Poster:

11,253 posts

199 months

Thursday 27th November 2025
quotequote all
This is the inside of a couple of patches of the roof of the outdoor kitchen......is this normal as obviously it's outside, or despite that should this not be appearing?




Rough101

2,894 posts

96 months

Thursday 27th November 2025
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It’s mould, my shed gets like that if I don’t bleach it, but odd that it’s happening in an undercover area with the wind blowing through it though

UTH

Original Poster:

11,253 posts

199 months

Thursday 27th November 2025
quotequote all
Rough101 said:
It s mould, my shed gets like that if I don t bleach it, but odd that it s happening in an undercover area with the wind blowing through it though
Ok I did think it would be mould of some sort.
Anything to worry about? Basically I'm hoping it's not a sign the felting of the roof has been done badly? Should I be doing anything about it?

phazed

22,396 posts

225 months

Thursday 27th November 2025
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Could also be that the ply was contaminated in that area with some sort of dirt. That will attract moisture and lead to condensation.

Strange construction with that trellis detail. Photo from the outside?

UTH

Original Poster:

11,253 posts

199 months

Thursday 27th November 2025
quotequote all
phazed said:
Could also be that the ply was contaminated in that area with some sort of dirt. That will attract moisture and lead to condensation.

Strange construction with that trellis detail. Photo from the outside?

paulwirral

3,700 posts

156 months

Thursday 27th November 2025
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Underneath the cooking facilities by chance ?

UTH

Original Poster:

11,253 posts

199 months

Thursday 27th November 2025
quotequote all
paulwirral said:
Underneath the cooking facilities by chance ?
Yep, the worst patch is absolutely.


paulwirral

3,700 posts

156 months

Thursday 27th November 2025
quotequote all
UTH said:
Yep, the worst patch is absolutely.

I’ll correct myself , above the cooking area !
I wouldn’t worry about it , bleach it off if your fussy , mine looks a bit scruffy above the bbq so one day I’ll fashion a chimney to divert the smoke out

Tisy

1,247 posts

13 months

Thursday 27th November 2025
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That's the moisture/steam from the stuff you're cooking collecting on the wood and then producing mould. Move the cooking thing outside out of structure or give it a hood and a flue and divert it elsewhere, or put a hole through the roof with a couple of foot of chimney out the top. Mould problem sorted.

UTH

Original Poster:

11,253 posts

199 months

Friday 28th November 2025
quotequote all
Tisy said:
That's the moisture/steam from the stuff you're cooking collecting on the wood and then producing mould. Move the cooking thing outside out of structure or give it a hood and a flue and divert it elsewhere, or put a hole through the roof with a couple of foot of chimney out the top. Mould problem sorted.
Hmmmm, not convinced any of those is realistically an option.
I thought it was very common place for people with big green eggs and outdoor kitchens to have a setup like this...... frown

Snow and Rocks

2,992 posts

48 months

Friday 28th November 2025
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I'm not a great fan of "man made" materials like ply or mdf at the best of times especially in outdoor environments, they never seem to age very well but this stuff is pretty good at dealing with any organic growth on external surfaces.

I believe it's the same stuff that's in Patio Magic that you see in normal DIY stores. This is just obviously much cheaper as you dilute it yourself. Be careful and use appropriate PPE as it's pretty strong stuff.

https://www.amazon.co.uk/Benzalkonium-Concentrated...

UTH

Original Poster:

11,253 posts

199 months

Friday 28th November 2025
quotequote all
Snow and Rocks said:
I'm not a great fan of "man made" materials like ply or mdf at the best of times especially in outdoor environments, they never seem to age very well but this stuff is pretty good at dealing with any organic growth on external surfaces.

I believe it's the same stuff that's in Patio Magic that you see in normal DIY stores. This is just obviously much cheaper as you dilute it yourself. Be careful and use appropriate PPE as it's pretty strong stuff.

https://www.amazon.co.uk/Benzalkonium-Concentrated...
Ahhh thank you, guessing I just need a spray bottle type thing and spray a mist onto the affected area?

Snow and Rocks

2,992 posts

48 months

Saturday 29th November 2025
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Yep, just spray or brush it on and leave it. Takes a while but generally works pretty well.

Buying the premixed patio magic might make sense for such a small area.

Like I said, be careful it's quite strong stuff.

UTH

Original Poster:

11,253 posts

199 months

Saturday 29th November 2025
quotequote all
Snow and Rocks said:
Yep, just spray or brush it on and leave it. Takes a while but generally works pretty well.

Buying the premixed patio magic might make sense for such a small area.

Like I said, be careful it's quite strong stuff.
Ok thanks, good to know I have options if I can't stand the sight of it

UTH

Original Poster:

11,253 posts

199 months

Tuesday
quotequote all
Just to revisit this, it has got a fk load worse, so I really need to do something about it.





Patio magic mentioned, meaning this stuff?

https://www.amazon.co.uk/Patio-Magic-Cleaner-2-5L-...

fooman

626 posts

85 months

Tuesday
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Spray a bit of CIF perfect finish mould stain remover on, although better to use when just a few spots before it spreads! There are other brands but this one is less stinky I find.

evenflow

8,835 posts

303 months

Tuesday
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Looks like the upside down!

037

1,350 posts

168 months

Tuesday
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No amount of spraying is gonna remedy that. you'll need to flue out the smoke from above where the egg is

J6542

2,930 posts

65 months

Tuesday
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Buy some upvc flat board in any colour you like and stick it over it. You will then be able to wipe it clean.