Dependant on the age of the chimney he repointed (over 100 a long time previous), once the mortar cures (get rid of periods vary, Look at the label within the mortar), Mark will apply a waterproofing agent into the chimney. Mark indicates 1st cleaning the chimney exterior with a masonry https://rafaelypzhs.answerblogs.com/28252400/gas-fire-place-an-overview