Insulating stud wall corners

[bluedog225]

I thought I’d check in before choose a method.

I’ve got some empty space on the exterior walls where the stud walls meet in the corner. The place is finished on the outside and not yet closed on the inside. The stud walls are tight against each other on the corner so I’ll need to drill holes to get to the gap. I was thinking of drilling a small hole in the top and using low expansion foam until I fill it up.

I’m aware of the dangers of using high expansion foam. Is low expansion foam the way to go? The only other alternative I can think of is to drill a larger hole near the top with a hole saw and just shove in cellulose until I fill the void. Tedious but doable.

Thanks

 

[jack stand]

At this point, yes drill and fill with canned foam.
I'd take a wild *** guess of drilling every 12" for a good continuous fill.

 

[CraigStu]

I'd consider drilling 3/4" holes like jack stand says every 12". You can angle the nozzle up and down to fill both directions and use the next hole as a view/excess foam port. I understand you are planning to use low expansion foam but still, I'd fill one at a time so you can watch the expansion to refine your technique. Last thing you want to do is have excess expansion weaken the structure.

 

[PCustoms]

High expansion foam should not be an issue for a properly installed stud.

 

[firebirdparts]

Air is pretty good insulation. If you have a bubble or too it'll be okay.

 

[Hank11]

I would wonder about the payback if this takes a lot of time and effort. We read a lot about how wood isn’t good insulation and how you lose so much in the studs and need a continuous barrier. Don’t get too carried away.