Back to top. Currently, most masonry chimneys are built with terra-cotta clay tiles stacked and mortared inside the brick structure. Without a liner, or with cracked and damaged liners, there would be heat transfer or actual seepage through the brick and mortar. A liner is a stainless steel tube inserted into a chimney to draft an furnace, woodstove or fireplace. The appliance will vent through that stainless pipe and use the existing chimney structure as an encasement.
New liners are gas tight systems and insulated for highest efficiency.
This system can solve most drafting and safety issues of chimney fire damaged or older unlined chimney flues. Back to top. Most dryer vents should be cleaned at least every two years or so. This depends on the length of your vent, how many twists and turns, and how often the dryer is used every week. Dryers that have short vents and little usage may be able to go longer than normal before being cleaned.