Aside from providing additional comfort underfoot, carpet pads absorb impact from below, relieving stress on carpet backing and fibers. Thickness counts, too.
The Carpet and Rug Institute recommends that you install padding that conforms to the manufacturer recommendations for the specific carpet being installed.
The Carpet Cushion Council recommends a maximum thickness of 1/2 inch for cut pile residential carpet padding (carpet with textures and twists). The cushion under low-pile carpet, such as berber or commercial carpet with loop or patterns, should be 3/8 inches or less.
LOW SALE PRICES ON PADDING
Absolute Flooring has low sale prices on cushions or pads, that can be used on all types of carpet