Are Old Buildings Cold in Winter? What It Took to Make an 1889 Minneapolis Brownstone Warm
Newspaper insulation, 65 restored windows and 4,000 pounds of lime mortar – and the blower door test that proved this 1889 Minneapolis building holds heat.

Newspaper insulation, 65 restored windows and 4,000 pounds of lime mortar – and the blower door test that proved this 1889 Minneapolis building holds heat.