![]() When installing new window tint, the ideal VLT depends on your goals: Damaged tint – Bubbles, peeling edges, and scratches will impact accuracy.Dirty windows – Built-up dirt, grime, and condensation can artificially lower readings. ![]() Multiple panes – Double or triple-pane windows have more surfaces affecting light transmission.Age – Tint can fade over many years of UV exposure, increasing VLT.Window type – Percentages between laminated, tempered, and annealed glass can vary.Take readings at different times of the day. Light conditions – Overcast days will read darker than sunny conditions.Here are a few variables to keep in mind when checking window tint: While less precise than a meter, this method provides a reasonable ballpark estimate of VLT percentage. Light conditions can impact the comparison. Take readings at multiple windows and average the results.Pick the picture that most closely matches. From inside, look through your tinted window and compare it to the photos.Tape the chart to the exterior of the window during daylight hours.Print out a tint percentage photo chart, like this example.Compare to Reference PhotosĪnother easy DIY method is visually comparing your tinted windows to reference photos showing known VLT percentages. They are available at auto parts stores or online for $15-$50. Tint meters provide professional-level accuracy. Take readings on multiple panes, as the tint percentage can vary.The display will show the VLT percentage, indicating how much light is transmitted through the window tint.Turn on the meter and allow it to calibrate if needed. ![]() Make sure there is no gap allowing excess light in.
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