Venting Case Study
Raises Questions
To the Editor:
I have tremendous respect for
Henri de Marne. His sessions at the
JLC-Live show were informative,
thought-provoking, and extremely
well presented. But his recent case
study on roof moisture problems
("Case Study: Roof Ventilation
Retrofit," 6/95) raises more questions
for me than it answers.
What was the relative humidity
inside this house? It appears to have
been very high. Was anything done to
reduce the amount of moisture generated
within the house itself, or were all
corrective measures directed solely at
trying to vent this excess moisture off
through the roof?
The ice damming shown in one picture
implies that the roof insulation
and ceiling airtightening were woefully
inadequate. Based on that evidence,
could not his