Need high heat calk for metal chimney

||Downhome|| · #21 10/09/12, 09:15 AM

Quote:

Originally Posted by meanwhile

How would we keep the perlite in the silver metal thing if we stuff it in there?

a cap, cut a hole the size of the interior pipe.
you don't want to cut a straight circle.
mark the hole size you will need,then mark another smaller circle inside.
cut out the smaller, then cut v's to the outside line so you leave tabs.
use the tabs to secure the out side pipe to the inside pipe.

farmerscotty · #22 10/15/12, 12:34 PM

Hey remember national fire code for uninsulated pipe is 18 inches from anything combustible and chimney pipe needs to be 3 ft above where it goes up on the roof.

Scott

meanwhile · #23 10/15/12, 03:43 PM

Well Fiddle. We cracked the clay flue this weekend. It is still holding in place but the boys fired up the Oven really hot and....CRACK! We are thinking over the whole affair now. We have the 2nd Oven built now (photos on the Facebook page) and will need to make the chimney for it safe and sturdy too.

Thanks for all the tips and pointers.

farmrbrown · #24 10/15/12, 04:27 PM

Quote:

Originally Posted by meanwhile

We successfully installed the metal home-made (half homemade using store bought parts) chimney pipes from the outdoor-wood-fired baking/pizza ovens. Yes, that is a mouth full.

Anyway - we needed to use calk around the top part - up on the metal roof. But, when we fired up the oven, the calk melted and ran down the metal chimney pipe into the inside.

What type of calk will not melt? Thanks.

This is what I used to seal upany leaks in the stove pipe and around the exit of the stove into the pipe. You can get it at Lowe's for about $5 a tube.

Fire Protection | Fire Stop Caulk & Accessories | 3M™ Fire Block Sealant FB 136, 10.1 Fluid Ounce Cartridge | B34776 - GlobalIndustrial.com

There is also some similar stuff used to repair the metal stove itself that will stand even higher heat. It comes in small tubs about the size of spackling and has the consistency of tar.

frankva · #25 10/15/12, 04:34 PM

Quote:

Originally Posted by farmrbrown

There is also some similar stuff used to repair the metal stove itself that will stand even higher heat. It comes in small tubs about the size of spackling and has the consistency of tar.

Rutland Fire Clay Company - Stove, Chimney, Fireplace maintenance and Hearth Repair Products.

Not sure how large a gap this would fill, and not sure how it reacts to different rates of expansion/contraction. I use it where the stove pipe goes into the stove.

Good stuff. Don't think I would use it on a roof.

Good luck with your fiddle.

badlander · #26 10/16/12, 08:30 AM

I've bought high temp stove caulk at Ace Hardware. They have two temperature ratings for it. Make sure you get the higher rated tube because the lower temp rated will degrade and peel off under high temps.

I think I paid under ten dollars for a caulk gun sized tube.