Hello friend,
Susan again,from Guangdong Grand Shine Construction Material Company,who is aluminium windows and doors supplier,and we have exported windows and doors to USA/Canada for more than 10 years.
We have get required certificates NAFS 08-11,Canadian supplement to AAMA/WDMA/CSA and test reports up to local requirement,our warranty is 10 years.
Our clients feedback good quality and nice workmanship.
If you like,you can keep our contact information,you can contact with us any time,thanks.

Best Regards,
Susan