Here it is almost December in Northeast Ohio. Have the woodstove, hearth, permit, and everything to install. Installer , who promised it would be done by November 1st still hasn't started. Before I even bother trying to find another one, is it possible to get a good seal on roof around flashing in cold weather? What outside temp does it have to be for the heat resistant caulk to stick? I know we shouldn't have waited this long.