New answers tagged spray-foam
Yes, you can do this. But there's no reason to cobble it together yourself; the Huber company (no affiliation) manufactures something called Zip-R that's an all-in-one version of what you're describing, plus a weather-resistant outer face that can be taped and doesn't need an additional water-resistive barrier (like Tyvek or tar paper) over it. Other ...
You are sort of describing some more modern insulation methods. Here's a video from fine homebuilding on how the pros are currently doing this. https://www.youtube.com/watch?v=6-65x7IDi40
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