Hello from the Philippines

[Manolo54]

Laurentius, where are you in Japan, if you do not mind?

[Laurentius]

Hi Manolo54,

I'm in a coastal city named Kamogawa, in Chiba prefecture, about 75 miles from Tokyo. Tomorrow I will celebrate my 19th year here.

[Manolo54]

Congratulations...I like Japan very much as well. So clean, and I feel very safe walking in the streets.

[pelang]

Hi!
I'm also from the Philippines but i live in Germany. this forum has caught my interest (in fact i posted a comment sometime last year. we used to be in the bakery business until towards the end of 2010 when we forced to stop our business because my husband (german master baker) suffered a mild stroke. i've been researching about the materials for a wood fire oven. when you mentioned, you have to cover the outside of the oven with blanket, perlite etc. i take it literarily. the blanket material you're supposed to mean, what is this material made of? Is this out of PVC that you cover the roof of houses here with (in most european homes) before they put on terracota shingles? Can you please explain this further?

[pelang]

the above message was meant for Ken524. and i forgot to say thank you in advance. sorry.

[Manolo54]

BTW, I have completed my oven using castable refractory as interior shell, then blanket insulation and perlite concrete as final layer... It actually came nice! My server, however is not letting me attach a photo

[wotavidone]

Originally Posted by pelang

Hi!
when you mentioned, you have to cover the outside of the oven with blanket, perlite etc. i take it literarily. the blanket material you're supposed to mean, what is this material made of? Is this out of PVC that you cover the roof of houses here with (in most european homes) before they put on terracota shingles? Can you please explain this further?

Hi Pelang,
The idea is to get the bricks very hot then stop the heat leaking away from the bricks to the air outside the oven.
The bricks are intended to get very hot indeed - maybe 400 dgerees centigrade. I believe a PVC insulating material, which stops heat flowing away in winter, would melt at those temperatures.
(Insulation impedes the flow of heat, but doesn't necessarily have the ability to withstand high temperatures.)
The blankets are usually ceramic fibres. These blankets slow down heat loss, and, being made from a very high melting point material, don't melt where they contact the brick.
So use a ceramic fibre blanket, or a layer of perlite or vermiculite with a little cement to hold it together.
Regards,
Mick