Hi, I have a roofing contractor installing a new roof on a property in Oregon. If I pay him 100% and he gives me a unconditional waiver/lien release upon receipt/deposit of my check, am I covered if he doesn’t pay his roofing material supplier? I have concerns about this and was requesting a joint check with the roof material supplier as a guarantee I won’t have my property liened. Thanks for your help. Karen Magranet