Repointing and tuckpointing: Even though bricks can very last a century, mortar commences to put on in 20 years. Repointing and tuckpointing replace mortar to guard the structural integrity of the chimney program. Standard cleaning with a store vac and common chimney cleaning instruments will prevent risky creosote fires. Here https://israelwaxrj.dailyhitblog.com/33486452/wood-stoves-for-dummies