Not only problems with window installation backer rod ,flashing,sealant. Good chance the tyvek is wraped in at the head of the window instead of out over the nail fin or flahsing! Tyvek has several problems with their installation specs! How would anybody like to have this house in joco kansas? No tyvek or anything else after the bricklayer ran out of felt! http://www.badstucco.com/bricks/bricks.htm