Galland did not respond to an e-mail message from the AP, and the company's president, Scott Jacobs, declined to be interviewed.

Among the recipients of Stobbe's letter was Texas A&M University, where one of Summit's largest buildings, a nearly 191,000-square-foot complex for track and football, was completed last year at a cost of $35.6 million.

Less than three weeks after the university received the letter, a three-person team from Summit conducted a two-day inspection of the track portion of the structure, an area that encompasses more than 115,000 square feet, and found no concerns, university records show. The football facility wasn't inspected, according to the records.

Texas A&M officials did not respond to multiple messages from the AP seeking to learn whether the university sought an independent inspection. Instead, the university system issued a statement saying it has "no reason to be concerned at this point."

The letter from Stobbe also says the fabric used in the Cowboys' 2008 roof replacement was the "same material" that has passed the hurricane testing requirements of Miami-Dade County, Fla. However, county records show only one company, Sprung Instant Structures Inc., with that approval.

"Unless you have a Dade County notice of acceptance, you cannot claim that your product is Dade County-approved," said Helmy Makar, the county engineer who approved Sprung's plans.

In response, Stobbe told AP the fabric met Miami-Dade standards when tested independently.