Boring stuff, but important. Early on I thought the existing insulation could be saved, but for the most part ended up getting replaced. The stuff below the floor got replaced of course with the new floor, but the insulation between the walls had it own issues too. There were two kinds, some sort of white mineral wool (not asbestos, thank goodness) that was just breaking into tiny particles, and some of the better constructed fiberglass batt insulation higher up had succumbed to leaks and rodent infestations – and some just plain smelled bad.
New insulation came from 16″ wide batts of Johns Manville R13 fiberglass insulation designed for 4″ house framing, with the kraft paper face peeled off and the batts gently split in two, resulting in 2″ insulation. I used their EasyFit blankets that can separated (pulled apart) into various widths, which makes the common 12″ wide frames sections easy to cut to size.
The most impressive feature is the new Reflectix foil faced bubble wrap insulation, At 1/4″ thick, installing it alone dropped the interior temperature on two similar weather days, by 24degsF. Where you couldn’t put your hand against the inside of the outer skin on a sunny day, you could after the Reflectix was installed. A space age material that was unaffordable just a few years ago, this is good stuff, and I highly recommend it.
OK, gross. You never know what is lurking behind your walls. You couldn’t tell from the outside or inside, but with the skin removed we found a large rat or bird nest where they had enlarged the hole around the bathroom vent pipe under the vent cap.
Some of the original fiberglass sections were reusable and I cut them up and used them in bays that had lots of lots of wiring – 1 layer on the outside of the wire, 1 on the inside – sorta like a sandwich with a wire filling.
More to come
Finished Skin Panels all installed, Zolatone painting the panels ….
The Relfectix insulation is available from Amazon.