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Re: Aluminum foil
Logically, how could a thin, highly conductive layer like foil have value acting as a heat reflector, especially without facing the source of radiant heat ie: the fire itself and is directly in contact with the thermal mass?
Since we discussing the science behind it, where's the evidence that shows that foil can reflect more heat than it conducts? Without insulation behind it, foil will suck heat out of the oven brick as fast as additional mass would. The science proving foil is a poor component to an oven build, is because of the physical properties of the material (aluminum) itself.
The thing about masonry is that it needs to breathe. Anytime you hinder that mechanism, steps need to be taken to facilitate the elimination of moisture. David found that out, and poked holes in his foil. Gulf incorporated a vent to release moisture in his shell. And I have seen how buried aluminum reacts to the alkalis in mortar when it is in direct contact or not. The oxidation damage will vary depending on the amount of moisture and oxygen the aluminum is exposed to. The damage to the material will vary build to build, location to location depending on the application.
Logically, how could a thin, highly conductive layer like foil have value acting as a heat reflector, especially without facing the source of radiant heat ie: the fire itself and is directly in contact with the thermal mass?
Since we discussing the science behind it, where's the evidence that shows that foil can reflect more heat than it conducts? Without insulation behind it, foil will suck heat out of the oven brick as fast as additional mass would. The science proving foil is a poor component to an oven build, is because of the physical properties of the material (aluminum) itself.
The thing about masonry is that it needs to breathe. Anytime you hinder that mechanism, steps need to be taken to facilitate the elimination of moisture. David found that out, and poked holes in his foil. Gulf incorporated a vent to release moisture in his shell. And I have seen how buried aluminum reacts to the alkalis in mortar when it is in direct contact or not. The oxidation damage will vary depending on the amount of moisture and oxygen the aluminum is exposed to. The damage to the material will vary build to build, location to location depending on the application.
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