Lead work on slate roof around new wood stove flue, is it right?

[Hereandnow]

Hello everyone

 

First post - Thanks for having me on the forum  I've had a wood stove installed and wondered if anyone can let me know if it has been done right where the flue comes out of the roof? Looking at other photos on the net at slate roofs they look different. I've taken some photos. The lead is on top of the slates and sealed with mastic, except at the top where it is under the slates and sealed with mastic.

 

Cheers for the help

 

 

 

 

 

 

 

[Russell griffiths]

No it’s not right, it’s a quick fix to an awkward situation. 
if they are a professional company who charged you the correct money to fit this, then they should have employed a roofing company to do it correctly. 

[nod]

No It’s rubbish 

The flashing  should be at least a third covered with slate The sealant won’t last 

[Nickfromwales]

 

Should look like this. 

[Hereandnow]

Thank you all for responding and for your help

[scottishjohn]

slates look very old and fragile#

exect some to break if they come back and do it as suggested

maybe thats why they did it that way to save you the expense 

who knows how far back they would have to go once they start removing slates ?

couldd maybe end pu with a complete reslate 

there are cerainly adhesives that could be used under the lead ,once you clean the slates that would work 

 

[Hereandnow]

Hi @scottishjohn

 

Thank you for your input.  

 

I see what you are saying based on how they look, but actually that's mainly down to moss and lichen, looking especially dry and crispy with this current weather.  I cleaned the other side of the roof last year but have not got round to doing the side with the flue.  Attached is a photo showing how that looked after a clean...

 

[Russell griffiths]

Call them back it’s not correct 

tell them to get a roofer to do it correctly, or you will and invoice them for the job to be put right. 
they should be hetas registered to carry out a correct flu install. 

[Hereandnow]

Unfortunately the concerns proved correct and the first time it rained the roof leaked.  The installer has since been back to redo it, but I still have concerns about how it’s been done and would appreciate any thoughts please...  

 

One piece of slate has been simply stuck on top of the lead with no overlap (bottom right).  A LOT of mastic have been used under and around the slates.  And only a few slates were removed so not sure how he fixed them back in.  

 

It rained last night and it looks like a small amount of water has leaked on to the stove top again.  Hard to be certain as didn’t see it actually leaking.  

 

Thanks

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Edited April 26 by Hereandnow

[Nickfromwales]

That’s absolutely shite.

 

You may be better off, if you’re otherwise happy with the stove install, getting another independent roofer out to just do this properly. 
 

Completely pointless getting this wally back as he clearly just cannot do roof work, and the risk is he’ll make it worse and then disappear / stop responding anyways.

 

The second attempt is worse than the first.   

[Redbeard]

Was the installer HETAS registered? If not, who signed off for Bldg Regs? If installer is HETAS reg'd may be worth asking HETAS if they have a minimum standard for making good. ('Not leaking' would be part of it if I wrote one!). Of course HETAS is (I guess) more about combustion safety than roof-work, but they are very closely linked - i.e. part of the same job. I would also get a quote for making good properly and inform the installer that this is what it will cost them.

[Hereandnow]

Thanks ever so much for all your inputs.

[madilyn]

On 26/04/2025 at 21:19, Redbeard said:

Was the installer HETAS registered? If not, who signed off for Bldg Regs? If installer is HETAS reg'd may be worth asking HETAS if they have a minimum standard for making good. ('Not leaking' would be part of it if I wrote one!). Of course HETAS is (I guess) more about combustion safety than roof-work or roof in Chicago, but they are very closely linked - i.e. part of the same job. I would also get a quote for making good properly and inform the installer that this is what it will cost them.

I always try to check with the installer first, if he has a HETAS registration and who processed documents on Bldg Regs, because it is important for further guarantee of work. I have come across that not all masters know the requirements for lead on slate roof, especially if the focus is only on safety by HETAS. I would also ask them for the standard and immediately say that the installer should pay for the corrections.