i am just curious what the average price per square is.. i have a roofer who can do a quality job with lead pipe jacks and 30yr shingle with 30lb felt for $245-$250..not including steep and high. he does a 20yr for $215-$220. i have seen people charging $159 for 20yr and $179 for 30yr.. i also figured out that exactimate and insurance will figure a roof for over $300 a square. please give me your thoughts or input on this subject. why such a big price difference? i am in the houston area. i really enjoy reading everyones threads and responses.. thanks