Why isn't water vapor included along with CO2.

The tree on this lot also diverts water under the foundation, so we added sand and vapor barrier underneath to keep water from collecting under the house. 

We are using vapor permeable tapes, liquid applied flashings, and corner guards for these openings before setting the windows and doors. 

I usually will put up a vapor barrier over the studs, then concrete board or green drywall, then I use a waterproof membrane such as Kerdi.

If the smoke does bother A and B, maybe you should ask C or D to start using a vaporizer.

Its a vapor barrier, but also insulates and reflects heat as well.

And due to the vapor barrier, (a huge plastic sheet) all the little (and not so little ) poopies stayed nice moist and fresh!

.- Blown insulation in attic- New deck- Crawlspace remediation and encapsulation- french drain, sump pump, blown insulation, vapor barrier, dehumidifier.- Landscaping front and back beds.

There does not appear to be a vapor barrier.

Once you get into framing, there's a lot of things to know about vapor barriers, ground contact lumber, mold-resistant materials, etc.In my opinion, this isn't a DIY type of project unless you're a licensed contractor.