hearth insulation question

[woods witch]

well, it's in....we poured the insulating hearth and are moving on. Next question is about some free firebrick we have. I've read that rule of thumb is that we want to stay away from 2lb firebrick and use 8lb firebrick. Well, we have about 150 white firebrick that weighs 5 lbs. They are 8" long, 2 1/4" thick and 3 3/4" wide. We need advice....we're afraid to use them if it's not worth the chance! Help!

[woods witch]

Picasa Web Albums - carolyn - wood fired oven
if anyone want to take a peek at our progress....
any suggestions on the firebrick question???

[asudavew]

They sound ok to me.
Try putting one in your BBQ and heating it up for an hour or so.
See if it gets nice and toasty.

Then turn the bbq off and see how long it stays hot.

It doesn't sound like they are insulating bricks to me. Those would be the 2 lb bricks you referred to.

Nice work so far!

Dave

[woods witch]

thanks Dave! What a great idea....we just put a brick in the oven to see how it holds heat. will post back to report how it did!

[woods witch]

turns out what we have is not firebrick....it's basically white sand brick. Glad we checked it out. We just came back from the brickyard with a truck load of firebrick and here we go!!! We are moving right along