I typically start with the lights out to check for light entrance from recessed lights, soffit vents, gaps in flashing, etc. then turn them on. I also take lots of pictures with flash and then examine them on the computer at home. I have found lots of stuff after brightening the image to search out the shadows, especially in places that I could not access. Reach in with the camera and take several shots while panning around.

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Jim Luttrall
Mr. Inspector.net, Inc.
Allen, Texas 75002