Ping Li

ATD Solar installed 3M Prestige 70 window films on about 125 sq. ft. of windows in the front facing side of our house. We’ve researched many film brands and found that these high-tech window films (3M Prestige, Vista Everlogic) are non-metallic so they do not corrode over time. They also let in good amount of light (in our case the Prestige 70 lets in about 70% of visible light). The films will also reject solar heat (Prestige 70 rejects about 50% of solar heat). These films are installed on the inside of windows and not on the outside so the installers will be working inside the house. We’ve learned that we can get a lifetime material and labor warranty from 3M if the work is installed by 3M Prestige-licensed installers. We contacted 3M Corp and they refer us to ATD Solar in the Bethesda MD area.

ATD Solar gave us an estimate for a range of 3M film types, but we picked the top of the line Prestige 70 from our research. We want to caution everyone that many window film brands and grades look alike but vary greatly in material costs (labor is the same). So you have to get the brand and grades clearly written on the invoice, demand a factory sample (so you can compare to what is installed), and also get or see proof of the film brand and grade markings at the time of the installation.

ATD Solar did an overall impressive work for our house. ATD was on time, had proper identification, showed us proof of the 3M film brand and grade, brought in all of their needed tools and materials, walked and moved around our house very carefully, and worked with very good precision and skills. Each window is sprayed, cleaned, and prepared for the film. Film is cut to exact dimension of each window and applied with tools to remove air bubbles. ATD crew was very fast and completed the work non-stop ahead of time estimates. My wife also liked the fact that they clean-up the excess film scraps and mopped up the window spray drippings on the floor and window sills. ATD neatly removed their tools and materials and left our house without any mess or damage.

It has been about 2 weeks since ATD installed the 3M prestige 70 film on our windows. We do not see any flaws in worksmanship. Our house is noticably cooler during mid-morning full sun. We are extremely happy with the window film purchase and installation. We highly recommend ATD Solar for window film installation.

-Ping Li, Homeowner