Apologies for the delay in progress updates for the OKC container home. I have been reluctant to post about what has been, to date, the worst aspect of construction, mainly in terms of execution and results.
After searching for a residential spray-foam contractor for several months and then waiting for the weather to cooperate, I finally found a guy who was both interested in the project as a whole and also seemed competent, SEEMED being the operative word. We had to wait for the weather to reach a suitable threshold so that the foam could cure properly, and that itself was a wait of one month, and then waiting for scheduling availability created another month’s delay.
Finally, dude showed up to do the work. (I’ve decided to omit the contractor’s name because, in fairness, he was trying something new and untested in light of the uniqueness of my project; however, if you would like to avoid hiring him, message me directly or comment and I will give you his name.)
We had originally discussed and agreed to him spraying two inches of closed-cell foam on the roof’s exterior. Then, Morgan and I would coat the foam ourselves using a product based on his recommendation (more bed liner, most likely). He had told me he would build a scaffolding around the roof so as to block the wind and also trap any errant foam during application.
Sounded like a plan.
When dude showed up, however, he springs on me the idea that he can avoid building a scaffolding by instead building a wooden frame around the roof perimeter and then laying plywood panel across it, under which the foam could be sprayed. Further, the plywood panels would have plastic sheeting on them to which the foam would not stick. That way, the panels could be removed, and Morgan and I could proceed with a protective coating as planned.
BUT THEN, dude suggests that if he were to omit the sheeting and just allow the foam to adhere to the panels, I would have a rooftop surface on which I could walk and potentially develop a patio. The only caveat was that he couldn’t guarantee how level the plywood surface would be given unpredictable expansion of the foam between it and the roof.
After some discussion in the driveway, I eventually went with this latter plan, as the idea of a walkable rooftop appealed to me.
I should’ve stuck with the original plan, though, and not let dude off the hook from what he originally told me, because the results were far below expectations and in fact constitute the most embarrassing/lackluster aspect of the container to date.
Eventually, all the roof work was completed. Having the insulation on the roof made an immediate difference in the climate control inside, and now, if I’m heating the space, the thermostat will usually crawl one or two degrees above the set temperature AFTER it kicks off. It also stays cool for a long time if I need AC, and it only kicks on a couple times per night (that I’ve noticed).
So, despite the headaches of dealing with yet another sketchy contractor, addition of insulation has made a positive improvement to the container’s efficiency.
Just try not to scrutinize it too closely when you come to visit.