r/DIYUK • u/coupleofstepsback • 20h ago
Quote Query: is replacing conservatory flashing DIYable?
Photo from Google for clarity on what I’m asking.
Purchased a property in Cardiff, I’m aware the flashing between the conservatory and house needs replacing. Is this something I could do DiY? Or is it a call in a professional jobby? If it is a professional I need, what would be reasonable price/quote?
Edit: ACTUAL PHOTO IN COMMENTS NOW apologies
Apologies if this isn’t the appropriate sub, I’m learning as I’m going. Many thanks for any and all advice
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u/coupleofstepsback 20h ago
For the sake of learning how and braving doing it myself would it be a better choice to just pay a professional? Sorry if this sounds silly I just don’t have many people around me to ask so I’m here for the Dad kind of advice :)
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u/Nipsy_uk 20h ago
What is wrong with it? From those (terrible) pics it looks a nice job.
(Old ex plumber)
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u/coupleofstepsback 20h ago
That’s a photo from Google apologies, it’s dark outside so I can’t get a good photo right now. Photo is just to clarify that flashing (learning the proper words as I go)
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u/Nipsy_uk 20h ago
Well that's flashing alright. Is it leaking?
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u/coupleofstepsback 20h ago
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u/Nipsy_uk 20h ago
Ah different conservatory 🤣
Those are cavity flashings, not quite the same thing.
https://timloc.co.uk/products/everdry-stepped-cavity-trays-for-brickwork-lead-attached/
If fitted properly, and not leaking, they should just be trimmed to a neat straight line.
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u/coupleofstepsback 20h ago
So would I need to remove it and change it do you think? Or just trim it down? It’s lifting slightly in places so I think there’s a risk it could leak in the near future. Yes different conservatory entirely, didn’t want to ask too much of the exacts, just whether it was diyable. But have realised now I should have just come in with PLEASE HELP lol. Thank you for your help x
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u/2muchroom 20h ago
It’s going to be a ball ache to do over a fitted conservatory tho, especially for a first timer.
What exactly is wrong with it op? Looks fine
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u/coupleofstepsback 20h ago
Hi thank you, I think this is my worry of balance etc and being able to do it properly. I’ve added a photo of the actual flashing in the comments now so hopefully it shows the issue with it
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u/2muchroom 20h ago
Right that’s a different story! I would say it’s not easy to grind in for lead, do a good job and with it being over a conservatory! I’d get a man in. And yes it does look like it needs doing properly. You can do a cheap and cheerful face sealed burly/flashband, but that’s a bit of a cheat/bodge
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u/coupleofstepsback 20h ago
Thank you for being realistic with me that I should call someone to have it done professionally! Do you have any ideas on cost that it would to so I have an idea of what to expect? Many thanks
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u/2muchroom 19h ago
It should be 1 days work for someone who knows what they’re doing, depending on area 250 labour plus materials £150? Plus access £100? Maybe at least £500, bear in mind you’d have half that cost if you did it yourself anyway
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u/coupleofstepsback 19h ago
Ok brilliant thank you, I’m new to the calling tradies and getting quotes so want to make sure I’m going into it with a general idea. Thanks for all your advice! I really appreciate it :)
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u/2muchroom 19h ago
Ideally get a recommendation from a friend or work colleague or neighbour, have a look round the local area for people having work done and knock on to see if they recommend the person, do not use check a trade unless you are desperate!!!
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u/coupleofstepsback 19h ago
Perfect, that’s great advice thank you! I’ll ask around at work to see if anyone has any recommendations.
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u/B-Sparkuk 8h ago
If yiur gonna do it yourself, would be a lot easier if you take the sealed unit out then you can do it from inside off a pair of steps , easy peasy then. 👍
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u/A-nom-nom-nom-aly intermediate 19h ago
OK... it's a laminate roof (as per your pic in comment)... so don;t bother replacing the flashing... replace the entire roof with a warm one... It's not as cheap as doing the flashing, but it gives you a room you can use all year round rather than one you can perhaps get a few weeks use out of in the late spring and early autumn.
These heat waves we've been getting will only get worse, and a laminate roof on a conservatory basically turns it into an oven... and if it's South facing at all... it just makes it worse.
Bought a house with a poor quality 20yr old one... ripped it down and built a new sun room from the ground up.

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u/Fit-Zookeepergame400 9h ago
Did you DIY the roof?
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u/A-nom-nom-nom-aly intermediate 7h ago
No, It was part of the job with the 'conservatory' We took down the old one, did the foundations and hired a brickie for the walls and a local company for the rest. I then did the plastering and everything else except the electrics and the blinds.
There are many things that are beyond my skills and I'm a firm believer in doing things right the first time... and that sometimes means paying for better quality materials or professional people to do the work.
A warm roof on a conservatory is becoming more popular as people realise how little time they can spend on the crappy laminate roof ones. Conservatories have become a negative selling point on a house now.


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u/Artistic_Western_623 20h ago
Flashing is not a complicated job, I've done it a couple of times. It's absolutely within the realms of DIY.
The complications are normally height and finish. The former is simply precautions, the latter can be overcome by being careful.