They reduce the amount of wood in the wall, making room for more insulation.
(They; reduce; the amount of wood; L:in the wall) Context(They reduce,List([0, 11))):(They; reduce the amount of wood making; room for more insulation)
They reduce,List([0, 11))
They They
reduce reduce the amount of wood making
the amount of wood L:in the wall
room for more insulation