with respect , why smoke test if you intend fitting a liner?Ted456
I had assumed the chimneys were brick built from the ground floor up but info presenting itself at the moment suggests it is embedded within the stone and only the stack is brick built. I have see the gables during the extension build (within the last 5 years) externally and internally in the loft and there is only stonework to be seen. All other fireplaces were filled in during works in 1996, this fireplace flue was relined to the then standards. I understand its difficult to assess from the photos provided.
I have previously seen behind the plaster on the sides and it is stone wall, I can see the wall next to the RH side lath and the stone wall is also visible. I have removed more plaster vertically over the centre of the opening and it is just stonework there. I have the dimensions of the burner, if we opt for a limestone surround I will need a 36" by 36" opening, otherwise it would be an opening to the stone uprights already situated with a decorative mantle (requiring twin wall if too close).
The constructional hearth is non-combustible (stone with concrete layer, this was seen when the floorboards were up for the gas pipe removal) approx 200mm deep and projects just over 500mm from the wall so within regs. Distance to combustibles wont be an issue with the dimensions presented and aiming for.
The main query concern is there appears to be no structural brickwork on the front chimney leaf so to speak (I can't see the rear wall clearly but behind the gas fire brick back it looks to be stone work again), with a stone and brick mix course at approx 57" then purely stonework above that. TBH, it was not what I was expecting, as stated had assumed there would still have been a brick built chimney.
I would stick a strong boy into the mortar bed but unsure which if any brick course its worth doing it in due to the final course layer being as described - part brick soldiers butted up against stone. I will upload some close ups to see if it can be see.
If you could be so kind as to state why the gas installation was dangerous I'd really appreciate it. The flue will be smoke tested and cleaned before installation of a steel liner, although as stated it was relined during renovations and alterations in the 90's. Even if good it seems the general advice is line with steel flexi to aid more modern stoves. Thanks again.
First pics shows the far left brick meeting stone. Pic 2 is the stone to the left (hard to see). Pic 3 are the bricks to the right. One course, mixed stone and brick? Appears to be final course of any bricks seen.
View attachment 202187 View attachment 202188 View attachment 202189