Community: Interior design

Newly constructed home in upstate New York (Cold Climate) with cathedral ceilings throughout. R38 paper faced batts with Sheetrock and T&G pine cover the entire ceiling. After the long winter months have past the warmer weather causes water to come streaming down the inside of the valleys and down the walls for at least 5-6 hours. A roofing contractor said it was caused by ice damning so I replaced the shingles, s&i guard etc. in both valleys and I had a leak this past Sunday afternoon (no rain or snow). I don't know what to do besides rip down the ceiling and spray foam.

Here's a link to a fun video about interior design: how to make a very small apartment work well:
http://zeroresource.com/2011/05/13/tour-a-tiny-apartment-in-spain/

Thanks to Anna LaRue, who posted the video on her Web site, ZeroResource!

I am considering having the fiberglass insulation removed from the attic floor and having open-cell foam sprayed in its place. Most foam installers are pushing the idea of sealing my ridge and soffit vents, spraying the underside of the roof and creating a so-called conditioned attic. This is a 2,100 square foot all brick ranch with a 6-12 roof built in 1967. We want to keep the insulation within the 2 X 6 framing as we have much of the attic floor covered with osb. We use it for some light storage.

Is there a safe way to tile a shower floor with a drain if I don't use the plastic tray like most showers have?
I heard someone mention there is a plastic tray that you can tile over?
I know the tray has less leakage and mildew mold but the tiles look so much nicer and richer.