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Old 04-25-2009, 06:37 PM
christo's Avatar
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Join Date: Feb 2006
Location: Eastern NC
Posts: 910
Default Re: Ken's Pompeii Door

My door is very similar and it is holding it's own as well!

On my last trip to the dump I picked up 2 oven doors to salvage the glass. There may be a modification to my door coming soon!

My oven progress -

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Old 09-04-2012, 06:48 PM
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Join Date: Apr 2010
Location: Minneapolis, MN USA
Posts: 1,479
Default Re: Ken's Pompeii Door

Originally Posted by Ken524 View Post
Thanks for all the concerns. I stopped by Home Depot to double check the materials I used. The aluminum flashing and expanded metal are definitely not galvanized . Next time I fire up the oven, I'll check the screws, but I'm 99% sure I didn't get galvanized.
After reading this thread I did some research into the toxicity of zinc vapors and how and when they happen and found that the temperatures of a WFO do not even come close to the vapor point of zinc. Zinc vaporizes at 1180C or 1664 F and is only toxic as a vapor. At those temps it would be hard to be breathing the fumes coming off the oven even if it could reach those temps. And there are no reported cases of Zinc vapor poisoning from residential fires that i could find. There are several reported cases of zinc fume poisoning from welding zinc but those temperatures are much higher and are burning off a considerable amount of zinc plating.

The amount of zinc used to plate a few screws that are not even in direct contact with the fire and probably do not exceed a temp of 900F are of little or no concern to me.

Again just my two cents.

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Old 09-04-2012, 07:41 PM
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Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
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Default Re: Ken's Pompeii Door

The galvanizing does seem to either melt or corrode at WFO temps I've found, so I stay away from using it. However, apart from the the debateable toxicity issue if the galvanizing goes you will get rusting of the steel bolts and nuts unless you use stainless. Also the conductivity of stainless is way lower than normal steel so all round is a better choice IMO. Use the smallest diam bolt you dare to reduce conductivity. I use four 3/16" stainless 316 bolts.
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Old 09-05-2012, 10:58 AM
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Join Date: Oct 2006
Location: Vancouver Island
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Default Re: Ken's Pompeii Door

"Copper and stainless are likely better candidates for doors."

or even better, aluminum. Lifting heavy, smoking hot steel doors in and out is a pain (and occasionally painful).

Street signs are up to .080 or so aluminum (12 ga or 2 mm).

Do a Google search for "aluminum signs" to find a source near you.

Last edited by Neil2; 09-05-2012 at 11:11 AM.
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Old 09-14-2012, 08:42 AM
Join Date: Jan 2010
Location: Wallingford, Vermont
Posts: 108
Default Re: Ken's Pompeii Door

Copper and aluminum are two of the *most* conductive non-precious metals, while stainless steel is a poor conductor of heat. That said, my "temporary" bake door is a slab of cal-sil wrapped in heavy-duty aluminum foil, and secured with aluminum tape (no handles). I've been using it for a year now... but my draft door is stainless steel.
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