8 years Medium traffic 6 years Heavy traffic 4 years Average.
Carpet life expectancy depends on the grade of the carpet. The better the grade, the longer it will last. A really good carpet can last 20+ years. This is a place where it is worth it to spend extra. The standard builder grade cream carpet that is typically in spec houses will wear out in 5-10 years and will start to be noticeably worn out after 3 years of moderate use. Heating and Air Conditioning: HVAC systems can last 15 to 25 years if taken care of properly.  2. Builder Grade Carpet Average Longevity Low traffic 8 years Medium traffic 6 years Heavy traffic 4 years Average Cost for Carpet, Pad & Installation - $14 to $22 per square yard Carpet Cost $10.00 to 15.00 per sq. yd. Specifications - 28 to 35 ounce face-weight, 100% nylon fiber. 4. High Quality Residential Carpet Average Longevity Low traffic 20 years Medium traffic 15 years Heavy traffic 12 years Total Cost for Carpet, Pad & Installation - $28 to $55 per yard. ______________________________________________________________________________________ 2. Builder Grade Carpet Average Longevity Low traffic 8 years Medium traffic 6 years Heavy traffic 4 years Average Cost for Carpet, Pad & Installation - $14 to $22 per square yard Carpet Cost $10.00 to 15.00 per sq. yd. _______________________________________________________________________________________ 3. Upgraded Residential Carpet Average Longevity Low traffic 12-years Medium traffic 9 years Heavy traffic 7 years Average Cost for Carpet, Pad & Installation - $23 to $30 per yard Carpet Cost $15.00 to 20.00 per sq. yd. To learn what grade of carpet YOU need to select take my Carpet Foot Traffic Test. 1. Apartment Grade Carpet Average Longevity: Low traffic 5 years Medium traffic 4 years Heavy traffic ` 3 years Average Cost per square yard installed $12.00 to 15.00 Carpet Cost $7.00 to 10.00 per sq. yd. Specifications - 24 to 28 ounce face-weight, 100% Nylon fiber. _______________________________________________________________________________________ 3. Upgraded Residential Carpet Average Longevity Low traffic 12-years Medium traffic 9 years Heavy traffic 7 years Average Cost for Carpet, Pad & Installation - $23 to $30 per yard Carpet Cost $15.00 to 20.00 per sq. yd. 1. Apartment Grade Carpet Average Longevity: Low traffic 5 years Medium traffic 4 years Heavy traffic ` 3 years Average Cost per square yard installed $12.00 to 15.00 Carpet Cost $7.00 to 10.00 per sq. yd. Specifications - 24 to 28 ounce face-weight, 100% Nylon fiber. 4. High Quality Residential Carpet Average Longevity Low traffic 20 years Medium traffic 15 years Heavy traffic 12 years Total Cost for Carpet, Pad & Installation - $28 to $55 per yard. In the average household of about 2-4 residents, carpet lifespan is usually about 3-5 years. It is by this point that most carpet fibers become old and frayed. Stains will also have sunk in, turning what started out as a pure white carpet into something graying and dull. There are several factors that can effect how long your carpet lasts, whether it's where you live, who you live with, or what you do in your home. But even carpet under the most trying of conditions can last many years, with the right carpet maintenance. Inexpensive, apartment-grade carpet will typically last anywhere from 1 to 5 years. A medium grade carpet will last between 5 to 15 years. The best of the best carpet on the market will last between 15 and 25 years on average.  Lower-Quality Carpet. There is no formal definition of builder's grade, but it typically refers to an economical carpet that only lasts about five years under heavy traffic. This is because most builder's-grade carpet has a face weight of only about 25 to 32 ounces. High-quality carpet, the type that lasts at least 12 years and often more, has a face weight of 38 ounces or more.  If goods or services are offered in square feet, multiple the number by nine to convert them to square yards. The cost of the actual carpet fluctuates with quality. The average cost of builder’s grade carpet is $9 per yard and it typically lasts three to five years. Medium grade carpet costs $25 per yard and lasts 12 to 15 years. Luxury carpet can average $45 per yard or more. 
http://blog.frusterio.com/home-design/how-long-will-your-major-home-purchases-last/ http://www.carpetprofessor.com/Carpet_Information.htm http://www.abccarpets.com/Carpet_Information.htm http://www.abccarpets.com/Carpet_Information.htm http://www.carpetprofessor.com/Carpet_Information.htm http://www.mertelcarpets.com/what-is-the-lifespan-of-carpet.html http://www.doityourself.com/stry/residential-carpet-life-expectancy http://homeguides.sfgate.com/quality-buildersgrade-carpet-87375.html http://budgeting.thenest.com/average-cost-carpet-laying-22984.html
average lifespan of builder grade carpet