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masuzzu 10-24-2008 05:55 AM

Aluminum foil
I was told to use aluminum foil for covering gaps between bricks!
Any input is greatly appreciated!

dmun 10-24-2008 07:43 AM

Re: Aluminum foil
Aluminum foil and mortar is not a good mix, the mortar will rot out the foil, so any supposed advantages, like heat reflection or vapor barrier, won't materialize.

I used a sheet of foil between my inner and decorative outer arch as a slip plane. It didn't matter if it rotted out, because I only wanted the oven not to be adhered to the masonry exterior.

masuzzu 10-24-2008 08:42 AM

Re: Aluminum foil
What about using the foil after the mortar has dryed and cured?

dlgeis 11-21-2008 11:46 AM

Re: Aluminum foil
reflective barriers only work well when there is an airspace on the hot side of the reflective barrier. If they are in contact with the hot mass they conduct the heat and radiate it more quickly away from the oven.

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