The installers in my crawl space used a tape that is 2 3/4" wide. Given 2000 sq. ft. over time there were 3 areas that needed repair. The 4" tape is excellent for this task or even a new install. Tape is tight to pull (a good thing) an adheres very well. Overall a great value. Shipping costs are a bite but not a deal breaker. Like most products you get what you pay for! 5 Stars