Why Do Most Fireplace Dampers Leak?

Your fireplace damper may leak because most fireplaces have a damper that form a metal to metal seal, you are probably losing money on energy costs. These dampers do not seal very well and in turn allow air to leak through. Over time the, poor, seal gets worse because of the metal plates warping due to the effects of heat and moisture.

See: Install an Energy Saving Damper