Since I remember seeing ladders in the early videos I am going to guess they will be planned to be in, my idea is that if you can get access to chimney you can block the smoke coming out... forcing the occupants out.
Shitty sketch I done of 2 simple ideas
Tarp with Bricks and Tarp tied down w/rope
I like this. Lighting a fire when the chimney is blocked would fill the building with smoke. Not only would it make vision terrible as the room filled up (even though a lot of smoke would be pouring out of the windows, barricaded or not), and should drop a players health gradually over time until they leave the smoke-filled environment.
If you wanted to prevent this you'd have to set traps, barbed wire, or other obstacles (maybe the ability to wrap barbed wire around the chimney?).