Some quick data to think with regarding an inoperable damper. First, sometimes an inoperable damper can be made to work again with a little coaxing with a hammer and some WD-40 and some back-and-forth movement to work it free. I have had a high rate of success over the last 20 years with freeing up a damper that has been stuck open or closed due to lack of use. If a damper does need to be replaced, one can be mounted on top of the chimney. A top-mounted damper also acts as a rain cap that will keep water and animals out of your chimney. You can certainly appreciated the value of keeping animals out of your chimney if you have ever had one come in and decide to die in it. Wonderful odor in the house… This photo is of a top-closing damper. It is operated via a stainless steel cable that runs down the chimney flue and attaches to a bracket that is installed in the fireplace opening on a side wall.
Occasionally there will be repairs that need to occur at the top of the chimney in order to install this unit. We give free estimates for damper installations. (360) 754-3902.