Retrofitting a 2×4 Wall for Energy Efficiency
If I’m going with rockwool inside the wall (regardless of the method used), should I put on a vapor retarder / air barrier like ProClima’s INTELLO on the interior side? At the foursevenfive blog, which seems to push the product a lot, they have a post recommending Intello in the between the two studs (https://foursevenfive.com/blog/the-double-stud-wall-simplified-low-cost-high-performance/).
My house is pretty leaky (build in 1972) and I would also like to improve its airtightness. Does intello work well as an air barrier? I understand for it to work as an air barrier I’ll need to apply it to my ceilings as well.
I will be doing a re-siding of my house in a couple years, at which time I’ll probably plan on applying a peel-and-stick (like Henry VP100) to the sheathing to further improve the envelope.
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