This static Halloween decoration was made from 10 sheets of 4'x8'x10" white foam for the walls, 1 4'x8'x6" white foam piece that was cut to make the steps and 2 10"x6' columns.
We used 10 sheets of 4'x8'x10" that was obtained from a local architectural foam supplier and custom ordered.
A template was cut out of plywood for the alternating pieces so that the wall pieces would fit together.
After attaching templates to the foam with bar clamps, we then used a Hot Wire Foam Factory 2'x4' Foot Compound Bow Cutter to make the cuts through the 10" inch thick foam. On the bigger cuts we cut out the main chunk and then came through again and made the closer cuts.