Top photo: The wood is hand-oiled with organic hemp, linseed, and tung oil: zero outgassing. Plus the wall smell nice for many days, like a salad dressing. The oils deepen the color of the wood, bring out the grain, and harden to a soft protective sheen over time. Choose solid wood whenever possible as plywood and composites contain industrial chemicals and glues that outgas volatile organic compounds for years.
Ever since I became aware of the impact of wrong lifestyle choices in 1993, I have sought out products that are made naturally, that would not harm me, or the environment. Our house is a cedar log home (so there's no need for objectionable insulation materials — well, except for under the roof, and for that we chose to go with spray foam, which became benign after it dried a day or two after application). The walls were hand-oiled with organic hemp, linseed, and tung oil.
The best building materials to use are ones that biodegrade and that do not outgas. They are:
Since we do all the building ourselves, it's doubly important to us that the materials we use are as natural as possible so we don't ingest any harmful chemicals during and after the building process. Thankfully, there are many safe alternatives out there. You just have to look hard and ask tough questions. Your health is worth it!