Afternoon-
The last two years I've had a severe icedam over the corner of one room that faces the bathroom. The bathroom's roof (upper) drops about
4 foot to the lower roof; the valley is interrupted when they diverge.2 years ago I gutted the lower room, installed a ridgevent, added new insulation, new soffits- still had a bad icedam'd winter.
Last year (which was a bad year mind you) I had a similiar problem. This year I've added new soffits to the bathroom area to vent the heat above the shower.
Here's what I'd like to do as a temporary fix until I can find a roofer that is willing to close off the valley by extending the upper roof down to the lower one:
1) Ice/water shield above existing shingles to protect the bathroom wall (normall exposed). Cut at a 30 degree angle from valley down to lower roof. Tar leading edge tight.2) Place heating / de-icing cable in tight formation around that bad edge. Double up near the wall to prevent any from leaking in.
3) Deicing cable on the Upper Roof above the area that is usually badly hit.Here's where it gets odd tho...
4) Add Aluminum flashing from the valley out (mind you over shingles) and OVER the heating cable. They'll be about 4 foot long strips. Tar the seams. Tack each one in place with a pair of nails about 1 foot above the leading edge of the cable. Ice/water shield top of aluminum under the row of shingles.I'll try and post a photo of the corner at
Suggestions very much welcome.
Jason Hirsch