Bunching
This can happen on plaited designs stitched into round floor rugs. As you unroll your new rug, work slowly by smoothing the rug out from the centre as you lay it down. For persistent bumps rug underlay should help. Lay the underlay down, then work with the same method of smoothing the rug out from the centre.
Placing a rug on carpet can also occasionally cause rugs to bunch (especially if heavy furniture is then placed on top of them). In this instance we recommend choosing a heavier weight rug with a higher pile and a cotton backing.