Building this house has been a constant learning experience, and today was no exception. My original plan was to build the walls from special insulated structural panels from Kama-Eebs, add some simple "X" braces to control shear, and throw on some housewrap before attaching my siding. And that would have been the cheapest and most ideal solution, but the more I looked at the final Kama panels installed the more I began to question the wisdom of that idea.
During install, we ran into some fit-up issues and the panels were now full of metal plates and caps that were added in various areas at different elevations as part of the field repairs to get the system to all fit together. As hard as the Kama repair team worked to get the roof to line up with the walls, things were still not flush. If I just threw housewrap over my panels, the shiplap siding -- the part you'll actually be able to see -- would never sit correctly. I needed something to create a smooth, uniform surface and I needed it not to cost a fortune. Then I discovered the amazing ZIP panel system.
The ZIP system is a combination engineered-wood panel and protective covering (with special tape for the seams) that would give me a 7/16-inch thick structural wall panel, moisture resistance and an air barrier all in one lightweight sheet. Just attach the $10 panels to my walls, tape the joints and that's it. I was sold.
The other timesuck was cutting the 4-by-8-foot ZIP panels so that the screws would hit the steel in the kama panels, which were not uniform. Neither of these things were ZIP's fault -- just the result of our ongoing experiment here. Once we got the panels all screwed on, we used the special zip tape to go over all the joints.
John B. Carnett, PopSci's staff photographer, is using the latest green technology to build his dream home. Follow along as the project progresses on his Green Dream blog: popsci.com/green-dream
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.