Before and after re-stretching carpet in a client's home that is only 4 years old that has had buckling for awhile. This is due to improper installation. Carpet manufacturers mandate POWER STRETCHING of all new installation. Notice the buckling in the doorway before re-stretching.
 

Hall carpet

12/15/2011

 
These are before and after photos of carpet cleaing in a home. This is the hall into the bathroom. Nylon fibers