Moved in to a house last year and it has a fireplace enclosure on outside of the house they used cheap plywood barn siding and need to replace what is the best replacement material to use in it place. A rot resistant material and should it be plywood then a house wrap and then a exterior siding.
I guess that depends on your budget and your taste. Once you get past the basic construction already mentioned, the finish materials are numerous.
Do you want the fireplace to blend into the house or do you want to be a focal point?
"They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety."
B. Franklin 1759