There was a certain amount of drilling to insert cables but any dust was cleaned up. The digital camera will not be obtrusive and offers a superb image. Chris at CRISM was advisable to us by our insurance coverage agent (the most beneficial recommendation you can obtain truly!) Chris https://cctv-installation-in-wake45444.blogdal.com/36874345/the-greatest-guide-to-cctv-installation-in-wakefield