Carpet Question Corner #9: What is TPI and why should I care?

TPI or “turns per inch” is the number of times two or more yarns have been plied in an inch length. The more twists in the yarn, the more durability in the carpet – which means it will be less likely to unravel over years of usage. Most carpet yarns have 3.5 to 6.0 TPI.

A good TPI to look for: 4.50 to 4.75.

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