I have had voom for about 4 to 5 month and I have not had one single problem since installation. So I decide to go to my roof and check out the install job Installs Inc. did. So my question is this, is it common for the installer to drill thru a shingle roof and for the wires to be nailed to the shingled roof. My concern is that if for some reason I cancel I will have these big hole on my roof. I am also concern with water leaking. I had my roof replace about a year ago and it cost a pretty penny.