Completed Octagonal Chimney Stack

[@garymckenzie4521]

Absolutely brilliant work rob I am a teacher of brickwork and it's such a pleasure to see a tradesman who takes pride in his work ,

[@anthnymalclmrberts3847]

Quality craftsmanship rob songer as always 🔥👍

[@quintverstraeten2089]

i'm a carpenter but i love your videos. true craftsman

[@tenjobtex]

Another great chimney. I don’t normally like watching brickies work ( I’m one) but I find you thereaputic and interesting 👍

[@CayRome]

Great work sir, looks amazing as always!

[@ollyfp]

Great work Rob!

[@Therytetime]

Outstanding as always Rob 👍🏻

[@davey4818]

Incredible workmanship

[@feedthefishy]

I wish I could do half of what you do. Amazing work

[@garethhope1]

Beautiful Rob nice work

[@robsonger1]

thank you

[@martingaynor5017]

your the man. I'm a stonemason. Love your videos pal

[@TheJosepi87]

Very nice touch with the white date/initials contrasting with the red flaunching. I built a pair of octagonal chimney stacks in lime about 12 years ago and Done it with a level, was very difficult to keep truly upright. The method demonstrated in your video is a very good idea. Fantastic work as always. Would you mind sharing the mix of the bedding mortar and/or red flaunching ?

[@robsonger1]

Yes of course, it was a 1:2 white OPC with a 1/4 lime and the red was added according to the instructions on the bottle.

[@anthonyworthington6495]

EXCELLENT, MAGNIFICO, look forward to the next master class😊

[@TomFoulkes-wf7yn]

Agree quality craftsmanship again Rob. Did you design the the chimney or architect

[@robsonger1]

It was left up to me to design this one. That occasionally happens

[@ЯЧеловек-л1г]

Well, Well. And how you plan finish the top of Chimney?

[@philbotherobot]

Is there no need for a pot now then ? Have you effectively built a massive pot . What stops the water going down the large flue liner . Looks amazing , true craftsman. Some good brickwork chimneys in Belgium . And some good ones at Chester zoo on the old original building .

[@Droningonuk]

There has never been a requirement for a pot

[@robsonger1]

there are a couple of bends in the flue to assist with the draw (see the video Rolled Batter) and this also stops rain falling directly onto the hearth.

[@johngarthwaite4051]

Quality as usual 👍…. Can’t help but think a nice terra-cotta pot to finish… but that’s just my preference, not matter what it can’t be faulted … watched your video with them two other bricklayers could see the admiration they had for you …your a decent alround guy…respect 👍

[@jonathansykes1297]

The best 👌

[@philbotherobot]

Class

[@Droningonuk]

Do you backfill the gap between the liner and the brickwork? If so what with?

[@robsonger1]

yes, it's Vermiculite.

[@bogey19018]

What type of mortar do you use ?

[@robsonger1]

I'm using the standard 1:1:6 mix we tend to predominantly use (white cement, hydrated lime, sand) and 1:2 on the flaunching

[@danwood6317]

I've always been taught that cement and lime in the same guage of mortar isn't good practice as they don't really like eachother, so to speak. We've had to do it on previous builds because that was specified by the architect. Just curious why you've done used that mortar, Rob? Is it to try and match the existing house?

[@robsonger1]

Cement with hydrated lime is fine, but you can't use it with hydraulic lime, the 2 aren't compatible and it gives a stupidly strong mix that will spall the bricks in a few years.

[@danwood6317]

@@robsonger1 thanks for clearing this up for me, Rob. Much appreciated.

[@danwood6317]

Just one last question, have you or would you ever use plasticiser with lime to make it more workable? I say no as they react and the lime doesn't go off properly. Just wanted your thoughts @robsonger1

[@kopite7949]

Not bad boss, but taking time 😘🤣🤣🤣🤣

[@robsonger1]

Just like a Guinness, it can't be rushed

[@Droningonuk]

Did you sign that LH?

[@robsonger1]

I did..

[@Droningonuk]

@robsonger1 ooh may I ask why? I was expecting RS

[@barringtonsmythe3464]

When I win the Euros you're building my house 😊

[@feedthefishy]

As someone who builds beautiful chimneys, what’s your thoughts of flue liners? Are they really necessary or is smoke leakage from aged stacks usually accounted for in the design of the stack? If it’s not leaking into the house does it really matter if it passes thru a feather wall into another flue etc, as long as it’s leaving the house.

[@robsonger1]

On old Victorian chimney stacks the that were parged rather than have flue liners built in, the withes would get eaten away by the sulphuric acid erosion and 2 things would happen, smoke would leak into other flues and as the flue without the fire below would be cooler the smoke lingers and even falls rather than get taken out by the heat meaning fumes could spill into colder rooms. And secondly, when the withes erode the strength in the stack becomes hugely reduced and cracks appear on the stack itself and after time they begin to lean before they eventually fall. Many stacks we see as we walk around are in desperate need of repair but not many ever look up higher than the keyhole of their front door.

[@feedthefishy]

@@robsonger1 thanks for your response 👍