I have just bought a nest security camera and the perfect vantage point for mounting happens to be the front facing surface of the chimney which provides a good view of the entire front of the house, garage and driveway. I was wondering if there is anything wrong with mounting the bracket for the camera to the exterior of our chimney. Our chimney in addition to standard brick and mortor has an addition layer of slate adhered to the external surface. I would use exterior wall plugs and predrill into the slate. I doubt that the drill would pierce the brick and mortar under the slate. I cannot find any advice or building codes related to drilling into the exterior of a chimney. Any advice or recommendations would be greatly appreciated. If it makes any difference we live in mecklenburg county in virginia.