It is important that you insulate your pizza oven, and for this I have used a Ceramic Fibre Blanket. It is both easy to work with, and gives excellent insulation.
FiberFrax® Ceramic Fiber DuraBlanket® S - 8 lb. Density
Oven Insulation Materials in Kenya 0722 706 416 - Kenworks
Ceramic Fiber Blanket Ceramic Insulation - 6lb / 50sf Roll – BrickWood Ovens
Insulation material alternative? : r/pizzaoven
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Ceramic Fiber Blanket. This item is 6 pound density, 1 inch thick X 24inches wide X 25' feet long/roll - 1 roll/box). What is Ceramic Fiber Blanket?
Ceramic Fiber Blanket Insulation 6# 2300F 1x24x25' for Wood Stoves, Pizza Ovens, Kilns, Forges & More - 6# Pound 2300 Degrees (Qty 1 Box)
Ceramic Fiber Blanket - Wood Fired Pizza Ovens - Colosimo
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1” X 24” X 25' 8# HWI INSWOOL (50) - Ceramic Fiber Blankets