Carpet Pad or Carpet Cushion is often a last minute thought after the carpet selection is done. I like to explain to my clients the way rebound pad (the most common carpet cushion construction) is graded.
I have been through the mill and watched as deliveries of recycled cushion came in from used sofas, chairs, and other sources. They are shredded, cleaned, disinfected and adhered to make what looks like a huge loaf of bread. Often 100′ long, 6′ wide and 5′ tall.
Before this pad is sliced the long way into 3/8″, 7/16″ or 1/2″ an end is removed and cut into 1′ square cubes (1’x1’x1′). They then weigh these cubes and rate the over all pad as 3 pound, 5 pound, 7 pound or 8 pound, what ever the weight is. This where they get the pad weight.
With this in mind it is the density that make a carpet pad last long term in traffic areas such as hallways, doorways and stairs. It is also this density that keeps your heal from going through and feeling the subfloor.
The same density that helps your carpet feel luxurius over the life of the carpet is also protecting the carpet backing system by not letting the carpet move and flex too much under each step taken.
Many other carpet pads are available, but few have the qualities and value of the 1/2″ 8lb. Pad the thickest and most dense carpet cushion approved by most carpet manufactures.