Wall 1 of 4 Course 1 of 6
Anagama wall
A soft anagama. The flame barely moves off the middle.
coins left
840 of 84 spent
84 to spare
controls
live heat, this course peak cell
this cell
0°
double bearing
open cell
Ashmason — a kiln wall in four walls
Ashmason
Lay a kiln wall course by course against a fixed purse. Straw brick is cheap and quick but it will not hold the heat. Kaolin holds anything and costs a fortune. The flame walks across the wall as you rise, and the bond you choose decides what the course below can carry.
- Every cell has a live heat. The hottest cell in a course is the peak — an over-toleranced brick there cracks the face.
- Running bond costs mortar but doubles the bearing under the course above. Stretcher bond is free and stacks its joints, which the firing test punishes.
- Four walls, then a firing test on each that shows you the exact course and column that failed.
best run 0 · arrow keys move · space lays a brick
How a kiln wall fails
Reading the wall
- Heat
- The flame rises with every course, and the hot spot drifts sideways, so the peak cell moves as you build. The bricks glow with the heat that will pass through them.
- Tolerance
- Straw brick 500°, fire brick 1500°, kaolin 3000°. Add 90° for each bearing point the course below gives you.
- Bearing
- A course sitting on the kiln floor or on a running bond course gets double bearing (+180°). On a stretcher course it gets single (+90°). The two end cells of a running course are half-width closure bricks and carry nothing at all.
- Bond
- Stretcher is free. Running costs 2 coins a course. Two stretcher courses in a row stack their joints: −18 integrity, and the wall will not certify.
- Failure
- An over-toleranced brick outside the peak cell spalls (−9 integrity each). In the peak cell it breaches (−30). An unfilled cell is an open joint (−20) and the flame comes straight through.
- Passing
- A wall certifies with no open joints, no spalls, no breach, and integrity at or above the template's requirement.
The purse is fixed. If you run out, you may leave cells open and fire the wall as it stands — the report will tell you where it went.
Banked the fire
Paused
The wall will keep exactly as you left it.
Firing test passed
The wall held
The wall held its heat.
the face after firing
sound · tight · spalled · breach · open joint
Run over
Run over
Four walls, four firing tests.
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