F&S Engineers provide input on solar film technology: "We experienced delamination with these in the past; about 25 years ago.  I’d be curious if the adhesives have gotten any better." - John Prince

"Films have come a long way.  Like John, I have seen several versions of solar films and have not been impressed with their durability.  The newer films and coatings are much better but the effectiveness is still dependent to the quality of installation.  The films may have some applications on campus but must be evaluated in terms of cost.  The solar transmittance is low enough for me to question whether IHPA would have a problem with our historic buildings.  We would also want to avoid a checker board appearance if the product were applied randomly to a building windows.  I don’t want to dismiss the product but it does need more investigation." - Fred Hahn