What is the difference between hand knotted, hand tufted and flat weave rugs?

What is the difference between hand knotted, hand tufted and flat weave rugs? Posted by Andy on 10/10/2010 to Rugs Hand-Knotted Rugs: This type of rug is made in a loom, with warp cords from silk, cotton or wool stretched vertically and weft cords stretched horizontally forming many rows of hand tied knots. There are no glues or backing used in Hand-Knotted rugs. These rugs are usually referred to as Oriental or Persian and are made in Iran, Iraq, Pakistan, India, China, Turkey and other countries. Hand-Tufted Rugs: This type of rug is made by using glue and a cloth backing to hold the pile fibers(tufts)in place. These rugs are faster to make and not as valuable as a Hand Knotted rug. The thickness of the pile is determined by how much is sheared off. The piles are made from wool or synthetic materials. Flat-Weave Rugs: This type of rug is made like a old fashioned picnic basket by looping or overlapping creating a flat weave. These rugs are made from organic materials such as cotton, wool and bamboo and they are usually reversible. Some of the trade names are Soumak, Dhurry and Killim.