That old-timer told me to always stretch carpet 3% tight or it'll wrinkle, but I did 5% on a 12-foot wide install in Phoenix last July and it pulled the tack strip right off the concrete.

Ray Williams · 2026-07-24T01:50:05.614032+00:00

Who was right here, the 40-year veteran who says 3% is the magic number or the numbers that show 5% held flat through two summers with no ripples?

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That old-timer told me to always stretch carpet 3% tight or it'll wrinkle, but I did 5% on a 12-foot wide install in Phoenix last July and it pulled the tack strip right off the concrete. | Carpet Installers - Free To Speak