The second fireplace is missing the concrete 'cover'- a 4" thick ~ 28" x45" concrete slab is covering top of other chimney, sitting on top of 4 bricks 'towers' at each corner. Previous owners destroyed most of house literally. I cannot imagine getting a full weight concrete slab up there let alone wrestling it in place (female here!). Is there any lighter weight material that looks like concrete or mixed with concrete ready made for this? Other than renting some sort of 'cherry picker' type lift from rental company I cannot see any other way to get it up there! Thx!