Rebuilding chimney stack???

tony6403

southcoastrgi wrote: »

it of course depends which way your house is facing, it may not be directly south ie sw/se, it's because that's where the sun is so it dries that side of the morter first

So , on that basis , all brickwork on buildings with a south facing elevation would be out of square. And, in that theory, why doesn't the north elevation settle back when it eventually dries?
I think that the idea that chimneys lean to the south comes from the notion that smoke rising up the chimney will condense more readily on the colder north side. This is supposed to cause toxic substances to leech into the brickwork and expand the bed joints.
I've not heard any mention of what effect this is supposed to have on the vertical brick joints.
I have laid many thousands of bricks and I think that all of it is a load of cobblers.

cyclonebri1

southcoastrgi wrote: »

I'm not sure where KS is, I've text him as well but no reply so I hope he's ok.

the lead tray inside a chimney is designed to stop the water that comes in at the top from going down the chimney & making the brickwork inside the house wet, the height outside can vary but must be above the lead flashing, ps chimney's don't have cavities.

generally chimney's lean to the south

We are talking the same thing but in different terminolgy, IE, the hole down the chimney being the "cavity":D:D:D

Oh, I don't know a single builder that can a straight chimney either, they all lean around here, N,S,E or W:D:D:D:D:D, they don't care