In a corner outside a closet in the basement we have a new bathroom discharge line (4") running ceiling to floor down the outside of the closet with a clean-out angle near the floor. So instead of reframing the closet because I would have had to go too far out into the room to be able to have access the clean-out, I decided to make a (vertical) valance out of 2" rigid insulation to cover it. I mitered the corner and was thinking wood glue would work because I was also going to reinforce the corner with bamboo skewers put through at different angles intermittently down the 83" length. It has to be strong because I built is so it fits in the corner real snug (the carpeting helps with that - but don't have it so tight that it would bow) and once painted should look like the wall with baseboard on the bottom for continuity. It will hopefully never need to be moved but if it does I want to make sure it doesn't come apart so therefore the question is... Is yellow elmers glue going to be good enough? Has anyone else ever used rigid insulation like this before? Thanks for your time!