FIX IT RIGHT?? Where's Mike Holmes when you need him...in Vegas actually so thanks in advance to the experts here @ TOH which I have enjoyed reading very much sooo with water enetring my home yet again (worst winter yet I know) and after repeated efforts by the last roofing company (20+K Job) to keep it out (they have failed over and over....I'm baisically looking at trying to eliminate the source of the water that is building on many sides of my roof edges, valleys etc. House is 36 years old....lacking proper roof insualtion I KNOW...maybe R25 AND NO attic due to design so when last roofed we created a soffit/ridge channel with furing strips, special drip edge with vent for the top deck which seems to help a great deal in summer with heat but in winter not so much AND around that huge fireplace chimney (roughly 8'X3' with 5 chases in it) where it exits my roof I melt snow ALL winter (see pics) certainly the MAJOR source of 90% of the water I have since tried a couple roof vents, one on each end splitting the furring strip channel which seems to have helped a small amount with the heat that has been making it's way ALL the way down the the roof on each end the width of the chimney. OK so here's my question: the stone is obvisouly radiating heat from the interior and the actual chases..the bolier vent is the hottest and is on the end with the grey vent (melts snow all the way down to roof edge eventually even with the vent in there. Back to the question...I can ramble cant I...HOW DO I FIX THIS??? FOAM I"M THINKING/PRAYING...I've tried to bring the ridge vent as close to the rock as I can and still be water tight in summer...could spray foam be applied inside neerest roof cavity to stone thru hole possibly or would the roof need to be opened up on top to spary actuall rocks where thry pass thru? a real pickle that I cant seem to get handled...your thoughts and plase see pics and ask for any others that may help...I surely have them.