Haunching my chimney - plan of attack ok?

[Scarlet Pimpernel]

Sorry to be critical, but it looks like you didn't explore your options much before deciding on the plan.
I'd have considered an alternative exit for the gas flue, removed the chimney to below roof level entirely and roofed right over it.

 

[^woody^]

What I am saying is you don't need all that masonry in this day and age to vent a gas fire which you probably use half a dozen times a year!

It will depend on what draw the flue gets. Too low and there may be no draw or a down draught, and then you end up messing about with different pots or terminals

 

[kingandy2nd]

Sorry to be critical, but it looks like you didn't explore your options much before deciding on the plan.
I'd have considered an alternative exit for the gas flue, removed the chimney to below roof level entirely and roofed right over it.

Huh?
My original question was about re-doing my haunching. Only when I've had my scaffold up could I look at the chimney up close and understand the state of it. You have to book the renderers well in advance for a summer job, and scaffolding is time limited, so stuck between a rock and a hard place.

In terms of removing chimney, other options, etc why would I have explored them before? The chimney has always had the flue in it and I had no intention of replacing the whole stack. I never knew it was an option previously, and quite frankly I'm always of the opinion if it ain't broke, don't fix it. Not really a lack of planning is it?

As for your criticism, go ahead I don't really care about your opinion. I don't think you've ever offered me any helpful advice before, whereas plenty of the other members on here have and I am grateful for their help. Considering I work in insurance and my other half is a teacher, we've made it this far with our extension despite my 'lack of planning' and the only trades we've had on site were the piling co and a gas safe fitter to disconnect my boiler...so we'll just continue to muddle through

 

[Scarlet Pimpernel]

The chimney has always had the flue in it and I had no intention of replacing the whole stack. I never knew it was an option previously, and quite frankly I'm always of the opinion if it ain't broke, don't fix it.

Sorry, I didn't intend to rile you. I made my comment on the possibility that the option could still be explored.
I would have considered removing the whole stack to below roof level and roof right over it, if I was aware that it needed some work, it only served the gas flue, and there was some roof work required anyway.
If I was in your place I would still explore that option anyway.
IMO, it's the better long term solution and opens up other future possibilities.

 

[catlad]

It will depend on what draw the flue gets. Too low and there may be no draw or a down draught, and then you end up messing about with different pots or terminals

True! you will need a gas man to advise/test