Northeastern US

Pennsylvania's historic stone and brick stock comes with strict historic-district rules.

Severe winters and dense urban brick make code enforcement heavy across New York.

Humid continental + coastal salt erosion.

Cold, snowy — old colonial masonry stock.

Coastal — historic stone chimneys + salt-air erosion.

Between severe winters and colonial-era stone chimneys, Massachusetts holds the oldest chimney stock in the US.

Heavy wood-burning, severe winters — heaviest creosote.

Granite-state masonry + heavy wood-burning.

Long, severe Maine winters mean wood is the primary heat source in many of its homes.