The satellite is looking at the of flight and intensity of the reflected signal, not 'color'. It's basically monochrome. You can make your ceiling either very m

The satellite is looking at the of flight and intensity of the reflected signal, not 'color'. It's basically monochrome. You can make your ceiling either very massive or very conductive to reduce the signal reflected, or install a corner reflector in the attic to overwhelm the sensor with its own high-intensity signals (like taking a photo in a mirror with the flash on).