A chimney does two jobs: it carries smoke and gases out of the house, and it keeps heat and sparks away from the wood framing around it. When creosote builds up, a liner cracks, a nest blocks the flue or water rots the masonry, it stops doing those jobs safely. That is why the usual advice is a yearly inspection, with a sweep when it is needed, before the first fire of the season.
Older homes around Sunbury often have brick chimneys with clay tile liners and mortar that has been through decades of weather, and newer homes are more likely to have prefabricated fireplaces with metal flues and chase covers on top. Masonry chimneys crack and leak at the crown and flashing, while factory built units suffer from rusted chase covers and worn parts. A chimney sweep who works in Sunbury regularly sees both and knows what to look for.
Chimney work around Sunbury runs from routine cleaning to real repairs, from a fireplace that smokes into the room to a stain on the ceiling after a storm. One call covers chimney cleaning, inspections and Sunbury chimney repair, and you do not need to know what is wrong. Tell the sweep what is going on and when it started.