Terrific product - we built a frame to create a space of four inches between the exterior and Indow. The installation was as explained in the videos. The hardest or most concerning part of the process was measuring - massive hassle if I got it wrong. However, with some practice felt comfortable with measuring and the fit is spot-on. Would recommend to anybody looking for noise mitigation and uv protection. We purchased the uv product and yet enjoying insulation and noise prevention.
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