I am wanting a quick-temporary solution to drain run off from my flat garage roof away from the house before the ground begins to freeze/winter hits. [b]The problem:[/b] I have a flat roof over my garage and the rear and right side of the garage is built into the slope of a hill. Currently the roof system is EPDM and not adequate for heavy rains (puddling and bubbling are occurring and there is likely a negative slope so water has no where to go). I'd prefer to squeegee off excess water until I can get a better roof system in place (I've tried an automatic pump to remove water and it was more time consuming, thus useless). However, when I do this, the ground along the foundation gets soaked and creates a waterfall down to my driveway (which is slopped downward from the street, thus I'm left with another puddle elsewhere-looking at a channel drain for this issue). I am wondering if there is anything that can be done to move the water flow away from the foundation around my garage that can be done quickly (a few hours) until I can get someone out to fix the drainage issue next year. All the DIY french drains and such seem too involved for the time I have before snow begins to fall. I was thinking of creating some kind of trough along the roof line that can feed out away from the house and down the hill furthest from our garage/driveway (like a small waterfall). Not quite sure what materials I would need to implement this and if the investment doesn't make sense so close to Winter? Any feedback is appreciated! :)

It seems like we only have this problem in cold weather, but I think it may have happened after freezing temperatures passed in the spring too. My thought was ice damming, but again, if it happened in the spring temps, maybe not. There are two layers off asphalt shingles on our ranch. The 50 year old original and the 18ish year old second layer. In the rear where there is the least sun exposure, the one valley drips water onto the ceiling. It's not bad, but bad enough. Hasn't happened for at least 6 months or more. I'm still leaning towards ice damming as the culprit and want to get people's thoughts on the problem and my solution. A roofer came out (wanting a lot of $$$ to re-shingle the valley) and said it's probably one misplaced nail, but if so, why did it take 17 years for that to act up? I'm thinking of lifting the overlap layer of shingles and running a heavy bead of tar (from a caulk tube) under it to potentially stop water getting underneath and damming down the length valley. Does that make sense? Is there any negative to doing that? Any other warnings or fixes you know of? Thanks guys!