Fire Bricks

Building your own forge is entirely possible. Not something I’ve done yet but my forge’s firebricks will breakdown at some point so I’ve started looking into it.

No matter the shape of your forge, you’ll need to source some fire bricks. I’ve found getting any info on firebricks quite a challenge.

Firebricks come in different ratings for different purpose. Depending on who you ask, you’ll get a different reply each time.

Some bricks are more prone to breaking down and cracking through the thermal cycles than others, and thickness also plays a part in how quickly they heat up and cool down.

Most seem to suggest 2″ of ceramic wool rated to 1310°C with refractory cement over the top.

• Ceramic wool with a refractory coating will heat up quicker and insulate better.
• Soft bricks take a little longer to heat up but will wear down fairly quickly.
• Hard bricks take a long time to heat up but can even your temperature out, and are more durable. They use more fuel to get to temperature.

Aluminium Oxide bricks are typically used in furnaces and will handle the temps.

Fire brick grades

UK Firebrick Suppliers

• Ulster ceramic pottery supplies – Grade 26 bricks
• Blue Matchbox – Grade 26 pack of 10

I’ll add more info as I find it.