(1) The vapor barrier graphic: a vapour barrier does little to stop moisture movement into walls/attics until it is properly sealed to be airtight. 98-99% of moisture movement into these areas is air movement which the unsealed vapour barrier does not stop!!! If you have a choice of an air tight drywall installation without vapour barrier or loose drywall with an unsealed vapor barrier behind it…choose the airtight drywall without vapor barrier!!! It’ll give you way more protection against moisture moving into walls!!!
(2) “Generally, older homes have an average of one to two ACH. Tight, new homes or older homes which are sealed may replace air only once every two hours or more (or .5 ACH).”
A “tight” new home will not be tight if it changes air naturally at 0.5 ACH. As a matter of fact, in northern climes during cold weather snaps, the house will be overdried, there will be nosebleeds, people will be getting shocks from door handles and energy bills will be high!! A truly tight home will change air naturally about every 20-24 hours without door openings and mechanical ventilation.
These things I know from personal experience:
(1) The first time I tried to make a house airtight was 1977
(2) I was a “certified” (recognized by US gov) energy auditor in 1981. (actually took the course (7 days) at Bowdoin College , Brunswick, Maine where INACHI member Marcel Cyr has done a lot of construction work)
(3) Bought a blower door in 1981 to do air leakage control work
(4) was trouble-shooter, researcher, site advisor for Canada’s R2000 Low Energy house program for 8 years in the 1980’s-90’s. During this period 2 of my clients were named Canada’s R2000 “Builder of the Year”.
PS: I have addressed only the 2 items I noticed in my first 30-60 second glance at the document…there may be more!