Chimney Sweeping & Repair in Baltimore, MD

The Baltimore Wash Intl Ap station averages 93 nights a year at or below 32°F and 21 at or below 20°F.^1,2 Repeated freeze-thaw cycles open small masonry cracks; an inspection should include the crown, the cap and the condition of the flue tiles. The median home in the city of Baltimore was built in 1947, older than the U.S. median of 1980 and older than the Maryland median of 1979.³ Older masonry chimneys may be unlined or have cracked clay tile liners; a Level 2 camera inspection is the standard way to confirm the liner before the first fire of the season.

The stock is old by national standards: 82% of Baltimore's housing units were built before 1980 (U.S. 50%), and only 5% since 2010.³ Pre-1940 chimneys were often built without a liner at all; relining with stainless is the usual remedy when the scan shows bare brick. Rainfall is substantial: about 45 inches a year, 11 days of it an inch or more.^1,2 Heavy rain tests the flashing and crown; most chimney leaks enter there rather than through the brick, and the inspection report should say which.

Snowfall averages about 19 inches a year.^1,2 Heating dominates the year: about 4,484 heating degree days against 1,322 cooling degree days (base 65°F).^1,2 In a heating-led climate, insulation and air sealing carry most of the energy-code weight for any work that opens the envelope. Building permits in Baltimore are normally issued by the city, which is not part of a county.^4,5 Where a liner or rebuild needs a permit, the contractor files it with the city before work starts.