For reasons talked about in other forum posts I decided to go with a Simpson oval insulated liner - it comes in sections you rivet together. I did a fair bit of prep work as my boiler flue exits right next to the fireplace flue. I needed to cut the oil flue down by 4" to allow the top plate of the simpson to sit properly, and do some metal bending on the top plate.
Two of us were on the roof with some safety lines - I would drag a section of flue up, rivet it to the previous one, release the woodworking clamps, drop the liner down, reclamp, rinse, repeat.
All fine until one of the joints sheared off, leaving one section at the top of the chimney, dropping the other three 10' down the flue until they hit the smokeshelf. We did have a safety rope that was attached to the bottom section, so we were able to drag it back up.
Upon inspection, my rivets held, but the there is a small connector section at the top of the pipe - this is also riveted on with small rivets. All five of these had broken. I have a suspicion my clamps had pulled the pipe out of true, but the connector piece was stronger, which pulled the rivets mostly out. Luckily they were easy to drill out and replace.
I would guess that the rivets that were in the sections that dropped the 10' may be compromised by the impact, but I had always intended to support the liner from the bottom anyway for my piece of mind and because of the way I will be sweeping the chimney (another forum post). Now I definitely will....
Not particularly overwhelmed by the Simpson - even without the shear which was probably my fault, the parts didn't fit together fantastically - ended up redrilling one or two pieces as there was no way the holes could be matched. A minor gripe, but also, if you're up a chimney with the rivets - would it have hurt to have put one extra rivet in each pack?
Two of us were on the roof with some safety lines - I would drag a section of flue up, rivet it to the previous one, release the woodworking clamps, drop the liner down, reclamp, rinse, repeat.
All fine until one of the joints sheared off, leaving one section at the top of the chimney, dropping the other three 10' down the flue until they hit the smokeshelf. We did have a safety rope that was attached to the bottom section, so we were able to drag it back up.
Upon inspection, my rivets held, but the there is a small connector section at the top of the pipe - this is also riveted on with small rivets. All five of these had broken. I have a suspicion my clamps had pulled the pipe out of true, but the connector piece was stronger, which pulled the rivets mostly out. Luckily they were easy to drill out and replace.
I would guess that the rivets that were in the sections that dropped the 10' may be compromised by the impact, but I had always intended to support the liner from the bottom anyway for my piece of mind and because of the way I will be sweeping the chimney (another forum post). Now I definitely will....
Not particularly overwhelmed by the Simpson - even without the shear which was probably my fault, the parts didn't fit together fantastically - ended up redrilling one or two pieces as there was no way the holes could be matched. A minor gripe, but also, if you're up a chimney with the rivets - would it have hurt to have put one extra rivet in each pack?
![[Hearth.com] Liner install today - what a pain in my backside](/talk/data/attachments/19/19971-ce819a2e84509a60ec3e0b7017f5e24b.jpg?hash=qKvH_NMrhF)
