The Achilles heel of artificial turf is its susceptibility to magnifying the sun. The risk factor for burning turf is a westward facing second-floor window. To prevent magnification damage, you can take the following precautions: 1) Choose a nylon turf. Nylon has a high melting temperature and will survive the reflections.  2) Create overhead shade on the lawn.  3) Apply a film to the window. This does not work 100% but will typically help. It's important to remember that windows are not the only thing that can cause magnification. Grills, bikes, and steel appliances can create reflections on the grass as well.