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We have 2 sliding pocket doors dividing 2 rooms, and we use them frequently. One starts from an outside wall, and freezing cold air comes out it all winter- is there any way to seal the opening and still let the doors open and close.
the only way to get at it is to remove the drywall / plaster in from the pocket wall and get your head in there and insulate it then put it back together
What Jkirk said plus,
You only have to remove it from one side of the wall, closer to the outside of the house, and between the door when its open and the outside perpendicular wall.
yah.. you can pull the drywall right in the corner.. cut it half way on the split stud