Please if anyone is thinking of replacing their windows with pvc do anything but, do business with Hi Tec who are located on Yachilan. I can not even begin to get into the problems that I have had with them except to say that I will probably end up in court with them which is exactly what I need as an out of country landlord. They were slow, delivered sub standard work and delivered just terrible work. I will probably have to replace two of the windows with the guys on nader and have our big dorrs taken out lowered and reeinstalled... i guess one moral of the story is dont do business with hi tec. The other is don't undertake a major project in cancun when you are in the u.s.