Anybody can bust bricks with water and cold. And everybody has seen masonry facades in distress. Has anybody seen distress in exterior masonry that is not due to poor water management or structural defect? Anybody seen “clear wall” freeze-thaw distress—ignore chimneys, parapets, sills, corners, cornices, free-standing walls, rising damp and porches (all of which are unaffected by energy measures)? No? … Maybe we could, and should, have a freer hand with energy measures in our buildings.
This presentation will give the results of a “survey” of freeze-thaw damage in buildings. It will provide the results of an “experiment” where hundreds of masonry walls were deprived of major interior heating. It will review some of the research (by others) on brick performance, to be used in hygrothermal analysis. And it will present the recommendations contained in an upcoming ASHRAE Guideline “Energy Efficiency in Historic Buildings”.