One room is getting too hot in rental house

[Bienes Raices]

The room is a kid's bedroom, and it has a sliding glass door, so the sun comes directly into the room. The last tenants complained about it, so I want to find a solution before the new tenants move in on July 1.

Would putting vertical blinds help at all? Or would it be better to put one of those exterior mats that hangs outside of the house? I have heard that putting tint on the window is a bad idea because it can cause problems with the argon gas that sits between the two panes. Thanks.

[Dave Barnard]

I have never heard of the tint issue. I would check with a quality window tinter that specializes in residential and commercial buildings. I second what Chris suggests and have your HVAC contractor see what can be done to modify the ducting system or install dampers. Dampers are very inexpensive and easy to install. Keep in mind this may help to lower the room temperature when the a/c is running, but will not stop the room from warming up during off cycles. That's where tint or other means come in to play.