I’m about to embark on getting quotes on my roof (no I’m not a tire-kicker, I just want to choose someone I can trust and therefore I want to have at least a base level of knowledge).
Have had ice dam issues and water entered into house. Roof is a split-level (pyramid hip + gable) on ~40 year old house. Shingles are approx. 12-13 years old and show discolouration (algae from forest behind house?) Underside of decking is showing discolouration as well, probably due to lack of proper ventilation. At one point there was a Bathroom vent venting into attic, but that has been corrected.
After inspecting the attic, discovered insulation touching the roof under-deck, so thermal bridging is likely occurring…and probably the cause of the ice dams in two locations. There’s not that many soffit vents either (two on one side of the gable and one on the other side since the Kitchen is an overhang; and two on each side of the pyramid hip). Currently, square vents are used. The pitch is not that steep (not sure what the actual pitch is), so getting into the attic to install baffles is not possible (and/or certainly not a pleasant task).
Here is what I am thinking (based on reading this forum):
a) Remove entire roof including decking.
b) Cut/install more soffit vents in existing wood soffits
c) Install baffles
d) Install 5/8" plywood (a bit stronger than code)
e) Inspect/seal flashing around chimney
f) Install ÃƒÂ¢Ã¢â€šÂ¬Ã…â€œwater and iceÃƒÂ¢Ã¢â€šÂ¬Ã‚