That’s too bad. Of course my first thought is ”well, temporary” lol but they should stay up awhile. We have some that have been up for five years. Was the surface cleaned with rubbing alcohol, left to dry, before mounting the adhesive?

Can he do a tension rod with fabric instead?

He might try the double-stick tape that is used for putting window film up. It peels off if you are careful (peel back, don’t pull), And, perhaps apply it on the top of the trim. The paper shade will end up draping or folding down over the edge, but when you peel the tape off, any paint that comes off won’t show.

The Command strips with velcro should work. It is important that the spot be clean (alcohol) and dry before applying.

If they are inside mount (or the windows allow it), the tension rod idea is also good--you can stick the blinds to the rods with some Very Serious Tape.

I'm on my second set of those blinds. The first set lasted about five years, and this set the same, except I accidentally tore one horizontally and it's held together with clothespins. :) It's my office and no one else sees it.

Ask him if he washed the wall where the strip goes. It could be that he didn't press hard enough to make the strip stick.

Check to see if there's a strong peel off tape for painted walls. Painters tape?

Ratherbesewing, your son has common sense. Everyone needs duck tape. One Christmas we played dirty santa, and my gift was a box of different colors of duck tape. It wasn't exciting at all but we used every single roll of it. In hindsight, one of the best gifts ever. lol

Last summer I painted our black rural mailbox yellow, and it also had a yellow flag that raised when mail was delivered. I could look out the window and see the flag because it was bright. Because I painted the box yellow, I used hot pink duct tape on the flag, that I got for Christmas.

I have the the temporary shades in black that sit in front of my regular blinds. I figured that I would need more of a strong adhesive than what comes with the shades. I have had them up now for over three years without any issues and this is the product I purchased.

Double sided tape

I wrapped mine around a self spring rod and put gorilla tape on it. perfect!

Does the paper shade or the fabric shade fall over more?