For general information about siding go to the following websites:

http://www.handymanwire.com/questions/sidingvinylq.html
http://www.hgtv.com/HGTV/project/0.1158.BDRE_project_7902.FF.html

For information about manufacturers products and their warranties go to the following websites:

http://www.certainteed.com
http://www.variform.com
http://www.alcoahomes.com/vinylsiding.html
http://www.owenscorning.com/around/exteriors_new/vinylataglance.asp
http://www.siding.com/pro/siding/wolverine/

If you cannot find the information you are looking for on the above listed Websites, contact our Sales or Product Department and they will be glad to assist you - 763-557-1808