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We had a woodburner installed about 6 years ago when we moved into our house. It's been faultless every year and regularly swept etc.
Anyway, today when going to light it I noticed that the vitreous pipe had somehow separated at the joint leaving quite a large gap (this probably explains who I was having trouble with it!).
Anyway, I wiggled it about and it all slots back together no problems. The chimney isn't lined so there's no problems with connections the other side of the register plate. My only question is, do I need to seal these joints? Is it a case of using fire cement on the joints or do I need to rope in there as well?
Also, I can see some fire rope at the joint with the register plate, I presume this needs covering in cement also?
High temp silicon (the stove stuff).... I'd not be fussed too much about the register plate.joint.
IME the cement is cheaper - if you buy a big tub but the silicone is better - till you have to separate it
As you note stick it back together and seal with whatever you chose
Don't use silicone it's temp rating is not high enough for this.
Everything you do has to survive worst case scenario which is a chimney fire.
That joint needs a stainless screw in it to stop it from happening again.
Cool, thanks. I presume I just put a bead of cement (for want of a better word) in the female end, slide the male end in and seal the external of the joint?
Just seen the above, not a bad idea. Yeah, noticed silicon is only rated to about 300c as well so was going for the cement
When I said 'the stove stuff' I meant the silicon-like stuff that my Clearview installer uses - black, in a tube, quite expensive but not actual 'silicon'.Don’t use silicone it’s temp rating is not high enough for this.
Seems to seal better than traditional fire cement.
Thanks all, will order some of the vitcas stuff you apply with a gun and see how it goes
Don’t use silicone it’s temp rating is not high enough for this.
Its rated to 1500 degrees C how hot is is stove?
Dont use normal silicone anymore than you would use normal cement
Because junkyard that is silicate cement, not silicone.
There needs to be room for expansion somewhere. I've put a screw in one joint (as twinwall suggests) but left one with lots of overlap to slide. It moves about a cm between cold and full chat. The draw means it never leaks fumes into the room.
personally I'd prefer the viscous enamel pipe to be 20 mm longer. That one has been cut such that it could be fitted after the stove (and register plate and adapter) are installed. If it were longer it's more awkward, it needs to be fitted to the plate/adapter and have the stove collar fitted to it, then have the stove slid carefully under, then the pipe and collar can be dropped into place. More awkward, needs a second pair of hands, but cannot work apart.
A bit of fire cement or a bit of fire rope will give a seal on your flue.
These STW wood-burner threads always get really heated.
Which is ironic.
Just wanted to post an update. Used some of this stuff
And so far it so good, seems to be holding up. Made a bit of a mess and was runnier than I expected but all in all pretty simply. Cheers everyone