"We expected an answer in the next two weeks," said Ted Mondale, who was sworn in Thursday as the chairman of the Metropolitan Sports Facilities Commission. "If it needs to be replaced, it will cost $15 million and take six months. That's the worst-case scenario."
Team vice president of public affairs/stadium development Lester Bagley told the paper the Vikings would not comment on the situation "until the assessment is completed."
The Vikings' Metrodome lease expires at the end of next season, and governor Mark Dayton has said he wants to pass a stadium bill. If the team doesn't get a new stadium, it potentially could be courted by Los Angeles.
The Vikings signed a 30-year lease in 1982, and have said 2011 will be their final season in the building.
The roof collapsed following a blizzard Dec. 11-12. Vikings owner Zygi Wilf has pledged to pay for one-third of a roofless stadium.
He completed his 20th NFL season and said repeatedly that he would not be returning to the Minnesota Vikings in 2011 after several years of offseasons dominated by talk about whether he would play another season.
Favre, 41, endured arguably his most trying season in 2010. He returned to the Vikings with the belief that the team would be able to make a Super Bowl run. But that hope was quickly derailed during a slow start, and Favre's streak of 297 consecutive regular-season starts ended when he sat out against the New York Giants in December due to a shoulder injury.
Favre returned the following week, but suffered a concussion against the Chicago Bears and sat out the final two games of the season.
He also endured controversy regarding alleged sexual harassment against former New York Jets employee Jenn Sterger in 2008. Favre avoided suspension, but was fined $50,000 by the league for not being candid in talks with NFL Commissioner Roger Goodell.
Favre finished the season with 19 touchdown passes and 11 interceptions and a meager 60.6 passer rating.