Flagstaff roofs take a beating. Between heavy snow load, freeze-thaw cycles, and ice building up along the eaves, most homeowners know to check shingles and clear gutters before the first storm. What tends to get skipped is everything electrical that lives on or near the roof — heat cable, the service mast, exterior lighting, and the attic wiring that sits right under all that ice.
Test heat cable before you need it
Roof and gutter de-icing cable is the most common electrical item on a northern Arizona roof, and it fails quietly. Plug it in on a cold morning and confirm it warms along its whole length, not just near the plug. Look for cracked jacket, crushed sections under hardware, and clips that have pulled loose. Cable that has been stapled, overlapped on itself, or run through standing water is a fire and shock risk, not just an ineffective one.
Heat cable should be on its own GFCI-protected circuit with a weather-resistant outlet and an in-use cover — not a household extension cord run out a window. If yours is fed that way, that's the thing to fix first.
Look at the service mast and drop
If your power comes in overhead, the mast where the wires land on the house is doing real structural work every winter. From the ground, check that it's still plumb, that the weatherhead is intact, and that the drip loop hangs below the entry point. Sliding snow off a metal roof can bend a mast or pull it away from the wall — and a leaning mast is how water gets into a meter base.
Never touch the service drop yourself. A bent mast is a call to us and often to the utility, and it's frequently paired with meter and service upgrades while the equipment is already open.
Exterior lighting and outlets take on water
Ice-dam meltwater runs where it wants. Soffit lights, eave-mounted fixtures, and outdoor outlets under the drip line all collect water when gaskets fail. Before winter, check that fixture lenses are sealed, that every exterior receptacle has an intact in-use cover, and that GFCI protection actually trips when you press the test button.
The attic is where roof problems become electrical problems
After the first big storm, put a light in the attic and look for staining on the sheathing and — more importantly — anywhere water tracks near a junction box, can light, or bathroom fan. Insulation packed over old recessed cans is a separate hazard worth catching at the same time. Wet insulation over a knob-and-tube or aluminum-era circuit is the combination that turns a roof leak into a house fire.
When to bring in a professional
Anything involving the service mast, a wet junction box, or heat cable fed by a makeshift cord should be handled by a licensed electrician before the snow sets in.
A pre-winter electrical safety inspection covers all of this in one visit — call us at (928) 563-6237.