help with insilation

[M.J.Lampert]

hello I'm building a forge with ceramic fiber blanket rated 2600F and coating it with a refractory paint rated 5000F. I am wondering if I should put 2 layers of blanket of if I can just put a third layer of coating 

thanks

[Frazer]

How thick is your ceramic fiber insulation? 2" of the ceramic insulation should be sufficient to keep the heat in on it's own, but since you already have 2 layers of refractory, one inch or so will probably be fine. Then a quarter inch of refractory cement over that will protect the blanket.

You could beef up the layer of refractory, but the ceramic fiber is a much better insulator so if you're going to go heavier on something, the blanket will keep the heat in much better. 

[M.J.Lampert]

frazer the ceramic wool is 1" 8# and the reason im asking is because if I put another layer of wool in I will only a space 3" tall and 5" wide so if possible I want to keep space open to make larger items ie. axe heads and hammers

[Frazer]

I'm sorry, I think I misread your initial post. My mistake. I imagine you'll be fine skipping the second layer of the ceramic, especially if it sacrifices that much space in the forge. Still, I'd get a second opinion from someone who knows more than myself. 

[M.J.Lampert]

ok do you think frosty would be a good choice

[Frazer]

Almost certainly, if you catch him in a good mood and ask the question with all the required specifics