Hello Mariela and welcome to the BrickWood forums! Congratulations on building a BrickWood Box. That’s going to be one amazing cooker when you are finished.
As you’ve seen, there are phases to this, and the foam inserts you are building in Phase A get used somewhat later in the process. As I read the instruction, here’s what I get, step by step, along with my own interpretation:
- (from step A9) Cut 7 pieces of foam. (Foam doesn’t always cut neatly, so you’ll come up with a couple of raggedy pieces.)
- Choose the 5 best-looking pieces from the previous step.
- On 3 of those pieces, apply Gorilla Glue to the adjoining faces, spray with water, and carefully align them. Stack them, and place a concrete block on top to weight down the 3 pieces. (You need the water because that’s what Gorilla Glue reacts with to form a strong bond. Foam does not have any moisture in it.)
- (Extrapolating from the graphic) Take the two remaining pieces of foam, glue them together in the same way, stack them, and place a concrete block on top of them to weigh it down while the glue cures.
Now, what happens to the foam you cut?
- The smaller stack (2 pieces) gets used pretty quickly, in step A20.
- The larger stack (3 pieces) has to wait a long time, until step E16 (p. 94). Keep it in a safe place until you need it!
- And the two pieces you didn’t select (pieces 6 and 7)? They are just trim, so that your smoker exhaust panel ends up with the correct dimensions. You must cut all 7 carefully so that the big panel stays squared at the corners, but you can discard pieces 6 and 7.
I hope this clears things up, Mariela, and I hope you will post often letting us know your progress and any further questions that come up. I’ve moved this thread into the BrickWood Box section, where there’s a number of folks who can share what they’ve learned.
Best of luck to you!