Carpet Padding 101

Absorbing the Abuse

Many consumers believe carpet cushion is used for the purpose of comfort under foot. While this is a result of the use of carpet padding, the primary reason for carpet cushion is to absorb impact that the carpet would otherwise be subjected. This impact can cause synthetic latex to break down, backings to stretch, separation of the primary backing from the secondary backing (delamination) and unnecessary stress on the face fiber. The best performing carpet cushion actually provides less comfort under foot, but extends the life of the carpet installation by absorbing the abuse.

Two of the most common mistakes by consumers is to purchase a carpet padding that is too soft or too thick. Carpet cushion that is too soft, bottoms out when exposed to foot traffic. This allows the carpet to assume the rest of the impact burden; thus shortening carpet performance life.

What can get confusing is the various methods of rating carpet cushion performance. Some carpet padding is rated in density, but there are various methods for determining density. Terms like indentation load deflection (ILD), indentation force deflection (IFD), compression load deflection (CLD), compression force deflection (CFD) all may be used to describe the test method for evaluating carpet cushion density. Essentially these terms are a method of evaluating how much weight is required to bottom the carpet cushion out. Some of these methods use a square inch as the area for evaluation, while others use a broader are such as 6 or 8 square inches. It is important to note which method is used when comparing carpet padding, because an 8 lb. carpet padding using the broader area of evaluation may equate to a ½ pound rating for a square inch measure.

Also, carpet cushion may be rated in weight per cubic yard. An 8-pound carpet cushion may weigh 8 pounds in a standard 3 ft by 3 ft by 3-ft cube. A flat rubber carpet padding may weigh 22 pounds per cubic foot and a prime urethane carpet cushion may weigh only 4 pounds, but the ultimate performance factor is how many pounds per footfall area will it take for the carpet cushion to bottom out.

The second most common mistake is to purchase carpet padding that is too thick. You may be told that a thicker carpet cushion will cause performance problems, but the primary reason for selecting thinner carpet padding is so the carpet is not so high from the floor that it will not hold on to the tack strip. The carpet industry has established a maximum recommended thickness of 7/16 inch, but you should never exceed ½ inch. The thought process here is if ½ inch is recommended, retailers will go to 5/8 inch. A ½ inch carpet cushion provides adequate cushion and still allows the carpet to hold on to the tack strip along the walls.

Types of Carpet Padding

Bonded Urethane: This carpet cushion is also called rebond and is the most popular type of carpet padding sold today. It is made from reclaimed scrap of high-density urethane foam used in furniture and automotive manufacturing, which is bonded together to form carpet cushion. Rebond comes in various thicknesses and densities. The density is rated as a function of weight in pounds per cubic foot. For example, a 5-lb. rebond cushion would weigh 5lb per cubic foot. The Carpet Cushion Council recommends a cushion of at least 5lbs and 3/8-inch thickness for light traffic areas, and 6.5 lbs. and 3/8 inch for heavy traffic areas. These are minimum guidelines and keep in mind the CCC is the trade voice for the carpet cushion (carpet padding) industry. Many carpet manufacturers recommend a minimum of 8 pounds per cubic foot.

One concern that you should be aware of with rebond carpet cushion is a chemical compound known as butylated hydroxy toluene (Bht). Bht is a common additive in foods, breads and cereals and is an antioxidant and has no known health effects. It is added to some urethane products to reduce the risk of fire during manufacturing. Unfortunately, this chemical compound has the tendency to produce yellowing in many carpet constructions. If you have purchased a rebond carpet cushion and yellowing has occurred, rinse with white vinegar or other mild acid before applying a detergent solution. Detergent solutions have the tendency to permanently set the yellowing. It is best to ask for written assurances from the retailer that the carpet padding that you choose does not contain Bht.

Urethane Foam: Urethane foam is available in different densities and thicknesses. Densities of these carpet cushions can be as low as ½ pound per square inch (psi). Some of these densified prime urethane carpet padding can be very good performers, but make sure you know what you are buying. Don’t allow anyone to discourage you from purchasing this carpet cushion, if the density is appropriate.

Flat Rubber: For the ultimate in luxury and long wear consider using 19 -22lb density flat rubber carpet cushion. This is the carpet padding that I prefer for my own home, but it is extremely pricey and difficult to find. The average consumer would not consider this carpet cushion because of its cost. While it is recommended that you replace carpet cushion with each carpet installation, flat rubber may be the only carpet padding that could outlast the carpet and survive a second carpet installation.

Waffle Rubber: Waffle rubber, like the name implies falls within the ½ inch recommendation but because of its waffle texture, this measurement includes air. This is a good carpet cushion, but in the past, its filler percentage was very high and the carpet padding tended to break down over the years. When carpet was replaced this carpet cushion reverted back to its original state of Georgia clay. Today’s waffle carpet padding performs much better than the waffles of the 1970’s and 80’s. Shop before deciding on waffle rubber. Get the heaviest carpet cushion you can find.

Fiber Cushion: This carpet padding is used primarily to take advantage of scrap fiber and promote environmental stewardships. Frankly, I have been disappointed with the performance of these carpet cushions. Other fiber cushions made from jute, or hair mixed with jute, perform better but I would recommend the cushion products listed above.

Carpet Cave highly recommends these carpet cushions

1/2 Pet Bloc 8lb. Carpet Cushion

Pet Bloc is a 50/50 blend of memory foam and the highest quality conventional foam, creating a combination that performs much like springs and shock absorbers on an automobile. The two components work together to absorb the pounding of foot traffic, providing the ultimate in luxury and performance.
1/2 Pet Bloc memory foam redistributes weight and surface pressure for the ultimate in comfort.
1/2 Pet Bloc has a Spill Trap that blocks spills and stains from seeping to the sub floor.
Helps spills from wicking back up.

 1/2 Pet Bloc Carpet Cushion

Always in stock at the Carpet Cave

Click here for specifications 

3/8 Support Guard 10lb Carpet Cushion

We recommend this pad for low pile / berber carpets where a low profile firm foundation is needed.

Exclusive Spilltrap® Moisture Barrier Technology prevents moisture from reaching the cushion and subfloor.

Support Guard Collection Products offer the ultimate in comfort, support and durability by incorporating a unique blend of ultra-plush memory foam and first quality prime foam in the cushion.

Features the Exclusive FXI carpet manufacturers warranty extension.

Features Ultra-Fresh® Antimicrobial Treatment, preventing mold, mildew and bacterial growth.

Offers a luxurious feel underfoot, and protects your new carpet investment.

Superior noise reduction and excellent insulating properties, suitable for use with all carpet types.

 3/8 Support Guard 10 lb Carpet Cushion

Always in stock at the Carpet Cave

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Shaw Triple Touch Enhanced Urethane Carpet Cushion
Ultimate Touch 10lb. 7/16
Premium Touch 8lb. 7/16

Carpet cushion may work behind the scenes, but it’s a critical element to consider if you want a comfortable home. And we know you do. For the absolute best of the best in comfort and performance, we recommend TripleTouch®. This premium cushion offers the following benefits:

• Unsurpassed Comfort Underfoot
• Enhanced urethane cushion technology
  Simply the most comfortable carpet cushion for long-lasting, beautiful floors
• Extended Product Warranty
• Doubles the Texture Retention Warranty on Anso®, EverTouch® and ClearTouch® carpets
  Life of the Home Cushion Warranty (details at shawfloors.com)
  Preferred cushion for ease of installation with Softbac® Platinum carpets
• Environmentally Responsible
• Made with bio-based polymers
  Reduces dependency on petroleum-based products
  Backing made with recycled content

 Shaw Triple Touch Enhanced Urethane Carpet Cushion

Triple Touch Cushion Specifications

GREEN PROPERTIES

* MECHANICALLY FROTHED/CHEMICALLY BLOWN

7/16 8lb. Master Guard Rebond Pad with Spill Trap

This pad is an economical upper-medium choice that offers a higher density and a moisture barrier that is better than most other choices in its price range.

 7/16 8lb. Master Guard Rebond Pad with Spill Trap

Always in stock at the Carpet Cave

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3/8 Black Gold 5 lb. Rebond Pad

This padding is your choice for apartments and rentals. It’s our most economical FHA approved pad.

 3/8 Black Gold 5lb. Rebound Pad

Always in stock at the Carpet Cave

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Tuftex Non Slip Area Rug Pad
Premium Rug Pad Ideal for Any Area Rug

Performance + Comfort

• Made with 100% recycled face fiber that offers extra cushion and support
• Surface finish secures the back of the area rug to the padding
• Basket weave design on backing grips the floor, keeping the rug in place. Advanced Protection for Your Floors
• Backed by Shaw’s 10-year Performance Guarantee
Always in stock at the Carpet Cave

Density – 7.5 lbs
Thickness – 0.20″
Finished Weight – 32 ounces
Roll Size – 6′ x 60′ (40 yards)
Roll Size – 12′ x 60′ (80 yards)

STAY AWAY FROM THIS PADDING…..IT BOTTOMS OUT / CRUSHES DOWN IN HIGH TRAFFIC AREAS WITHIN A COUPLE OF YEARS!!!…….IT LOOKS GOOD BUT IT DOES NOT PERFORM BY HOLDING IT’S RESILIENCY

Carpet Cave sold this pad several years ago and thought it was a high quality pad but soon found out within 2 years that this pad bottoms / flattens out.

I put it in my home years ago and was really disappointed.

It looks good but don’t be fooled by the appearance.