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bronco2 09-21-2009 12:14 PM

Exterior chimney chase
Has anyone got any tips on building an exterior chimney chase around an 8" double insulated chimney off of a wood stove. My problem is we just had a hailstorm and it kicked the crap out of my stainless pipe, but instead of replacing it and waiting for another hailstorm I would just as soon build a box around it and cover it in. Has anyone done this so you can give me a few hints.

Gary in WA 09-21-2009 05:06 PM

The pipe should extend 2' above anything within 10' to to bottom of the vent and be minimum 3' high including the vent to the roof surface. Fire-stop at attic and roof deck. Keep minimum clearance from pipe to combustibles. Frame the chase so the bottom of the vent is ? above the chase height, As per manufacturer. Frame the walls on the roof, assemble 2 together, then stand each set and nail off corners of last two joints. Install tin or aluminum chimney cap and flashing, caulk all nail-heads and paint. (Hint) Using ply or sheathing/Hardie, leave bottom of 2' off a side and the back, to nail plates to roof sheathing/rafters, and flash comp. before installing bottom access pieces. Hold wood above roof 2' and install step flash first with straight flash in chase wall.
Be safe, Gary

bronco2 09-22-2009 06:55 AM

Thanks for the info.

Gary in WA 09-22-2009 01:26 PM

You're welcome. And be careful up there!
Be safe, Gary

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