Ask another person to apply tape to the edge stretching and pulling the rug flat as you work.
How to flatten rug edges.
This should flatten the areas out.
Set the corners back in their natural position.
Get a wet sponge or a wet towel and moisten the edges of the rug once you have it unrolled and in place.
If corners still curl upward flip the rug over and let it sit that way.
Many times this will allow the rug to lay smooth for a while.
Half the tape should be on the.
When you let it dry on its own the rug should flatten out.
Smooth the rug as flat as possible along the edge or edges that curl.
If the ends still curl up move to the next steps.
Lay a damp towel over the edges and iron them flat.
Also check to make sure that the rug you purchased is waterproof and can handle this trick.
Then take an iron and set it to a medium heat.
Take a wet towel and moisten the areas where the carpet is curling.