Then take an iron and set it to a medium heat.
How to get an area rug to lay flat on carpet.
If your area rug is for a sitting area make sure the edges of the rug go under the sofa or chairs to help keep it from moving.
If possible help hold the area rug in place by setting heavy furniture on top of it.
The tape is double sided so after you have it positioned where you want you simply peel off the paper that is protecting the sticky side that will be against your carpet.
Apply the tape to the edges of rug.
Many times this will allow the rug to lay smooth for a while.
Turn over the rug with the right side down.
Cut tape to fit each edge of the rug.
I flipped the rug back over pressed it over the carpet and it seriously worked like magic.
Lay a damp towel over the edges and iron them flat.
Apply carpet tape around the edges of the rug.
Turn over the rug and lay it on the carpet.
Double sided tape could be used in place of the carpet tape.
Take a wet towel and moisten the areas where the carpet is curling.