I enjoy messing around with spray foam insulation. It's like Playdoh for adults except you have to wait until it skins over before you can touch it without getting gooey sticky hands. Funny enough, it also keeps growing so you end up having to hack and carve it into shape.
Since you could see the spray foam-ed seams through the front of the wall mount fireplace I gave it a quick coat of black paint.
And just like that we have a fireplace of a sort. The cost break down runs along these lines
- Great Stuff (2 cans) $7
- plywood scrap (free on hand)
- fireplace caulk ($5)
- wallmount fireplace ($70)
- hours of labor husband spent busting through brick and wife hauling brick: priceless