My brother has an area rug that constantly bunches. It is on top of carpet and we put a pad with that gripping surface under it, but it still won't stay put. We need something that will keep it from wrinkling every time someone walks on it. Is there a product (besides duct tape) that will do this?
tack it down on the edges
Glue or staple a piece of cardboard to the bottom.
I know you said duct tape but why not try some wide double sided tape?
You mentioned you have a pad. Is it a pad specifically made for a rug going over a carpet. If not that might be the problem. Rug to Rug hold pad is best. It is a thin pad that has a tackiness on both sides. It will not hurt your exisiting carpet, and will hold your rugs in place. It take a few days to get the pad to settle into its memory to hold your rug. A rug to rug hold pad will sometimes lose it tackiness to hold a rug in place, however if you can wash it usually that tackiness comes back. Don't put it in the dryer. The rug to rug hold pad sort of feels like post-a-note tackiness. Usually this type of pad can be purchased at Home Depot or Lowe's and most rug stores will carry a variety of pads. If all else fails you can use double-sided tape, not duct tape.
