Flash And Batt…The Hottest New Dance Move (And An Approach To Insulation)

I’m being given the nudge to write another “informative” post.  So, with much internal struggle….here goes.

Last time we were getting smartified we reviewed spray foam insulation.  There are two options in this department: open cell and closed cell.  I’ll make it simple by just saying we’re going with closed cell and the main reason is because of its moisture resistance.  These steel containers get a little shweaty so we’ll be applying an industrial grade antiperspirant, so to speak.

After the Icynene foam is sprayed against the interior metal, 2×4’s will be put in place.  In our case, these are less for structure stabilization and all about giving us beams to nail our walls into. *Remember, only the walls that make contact with the outside world (essentially the rectangular frame of the house) must be insulated and have interior walls added.  All other walls will remain corrugated metal with some sort of sealant/paint to take care of the lead issue.

Moving right along, after the 2×4’s comes the BATT INSULATION.  Ok, so this stuff usually comes rolled up and ready to roll out.  We’ve got a few different options such as: fiberglass (pinky, fluffy, not cotton candy), mineral wool (spun rock, yes…wow), plastic fibers and natural fibers.  One option we have been seriously considering is denim, as in your pants.

denim insulation
rock wool insulation

Unlike spray foam which requires a trained dude or dudette in a hazmat suit, batt insulation is DIYable and relatively inexpensive.

After the batt is rolled out and in place, the walls are added.  Post on walls to come. Walls on posts also to come.

When close celled spray foam and fiberglass batt insulation are used together, it is being called the “flash and batt” approach to insulation.  It’s been moving into the popular crowd due to increased R-value, ease of installation and anti air leakage qualities.

Reflective insulation is the final part of the holy insulation trinity.  I know you could handle it, but we’ll stop while we’re ahead.  Thanks for gettin’ nerdy with me.


7 thoughts on “Flash And Batt…The Hottest New Dance Move (And An Approach To Insulation)

  1. Rock wool is really itchy and you don’t want to breath it in while installing. We used the fiber/denim type in Moss’ room, soft enough to sleep on and no itch, only problem with it was it was really difficult to cut. Typical utility knife just doesn’t do it. We found a solution though in one of those fabric wheel cutters that quilters use.

    1. Thank you for the feedback Paul! From what I can tell denim is the way to go. We just came across the rock wool in the last few days and although a cool concept, there definitely seems to be some major drawbacks. Soft enough to sleep on sounds just about right 🙂

  2. Just discovered another type of insulation… BioSeal. Produced by Rhino Linings, this closed cell polyurethane foam is water blown and contains 16% bio-based content. It has an R-Value of 19 at 3.5 inches, and though more expensive then normal batt insulation, it would prevent the need for a vapor retardant paint to be applied to the metal shipping container walls which would save money and time. Check it out here: http://www.rhinoliningsindustrial.com/products/spray_polyurethane_foams/biobased_501w%EF%BF%BD/48/232

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