Frieze carpet and extra soft long strand carpets are not recommended for layering rugs.
How to keep a rug in place on top of carpet.
But whether the rug is a large oriental rug or a small round area rug it can bunch up when walked on.
Measure the length and width of your area rug.
Area rugs make nice accents to a room setting off a coffee table or entry point.
This is because the underside of the rug is smooth and glides over the carpet underneath.
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.
How to keep rugs from slipping on carpet.
Ideally there should be furniture holding the rug on all four sides but if the furniture is heavy enough simply anchoring it on.
Place a non slip rug to carpet gripper or pad under the base rug to keep the rug in place and protect the carpet underneath.
Placing a nonslip pad under your area rug will help keep it in place and minimize the stretching that occurs when an area rug is on top of carpet.
If possible help hold the area rug in place by setting heavy furniture on top of it.
I came across another option called gripcote ultra that makes any rug or floor mat stick to any surface.
Rugs that slip and slide on hardwood vinyl or tile floors are a known hazard but you might not expect a rug to slide when it s lying on your carpet.
These carpet types don t offer enough support making it more likely that the rug will shift and buckle.