If you closed on a house in October or November, you are reading this from inside your first real winter in it. The home inspection report covered the house in October weather. The seller showed you the panel on a sunny afternoon. Six weeks later there is frost on the inside of a bedroom window, a chirp coming from somewhere on the second floor every 41 seconds, and a smell at the dryer that nobody mentioned. This walk-through is built for that reader - the recent buyer doing the settlement winter, not the long-time owner doing a routine check. The Hamilton, Burlington, Waterdown, Ancaster, and Dundas closings from this fall are the calls we will be on in January.
Before you start: the documents the seller gave you
Pull the file. Specifically:
- The home inspection report. Find the electrical section. Note any wording like "monitor," "consider," "recommend further evaluation," or "near end of service life." Those are the items that did not block your closing but were never resolved.
- Any ESA permit history. Sellers sometimes hand over old certificates of acceptance from prior renovations. If there is a 2014 panel-replacement certificate or a 2019 EV-charger permit, you know what is documented; the gaps are where the questions are.
- Utility account. Confirm the meter is now in your name with Alectra, Burlington Hydro, Oakville Hydro, Hydro One, or Lakeland Power. Outage notifications and time-of-use billing depend on it. A surprising number of closings drift for a month before the utility account is corrected.
Read those before you walk the house. The walk is more useful when you know what was already flagged.
Heat trace cables - the first thing first-winter owners do not check
Many Golden Horseshoe and Muskoka homes have heat trace (self-regulating heating cable) on a roof edge, in a gutter, around a section of soffit, or wrapped on an exposed water line in a crawlspace. The previous owner knew where it was. You do not.
What to do:
- Find the plug. Heat trace is almost always cord-and-plug to a dedicated outdoor receptacle, sometimes inside a small junction box at the soffit, sometimes plugged into a basement crawlspace receptacle. Walk the exterior at dusk and look for the warm strip of melted snow on the roof edge - that tells you where the cable is, and the plug-end is usually somewhere near the start of it.
- Confirm it is on. Self-regulating cable draws current only when cold. The way to confirm it works is by feel (warm jacket on the cable at -10°C) or by clamp meter on the cord - which is electrician work.
- Confirm it is on a GFCI. Heat trace on a non-GFCI circuit is a code issue and a real hazard - the cable runs hot, against wet snow, with mechanical stress at every clip. Failures track to ground.
If you cannot find your heat trace and the previous owner mentioned it existed, that is a January call. We will trace the circuit and verify operation in about an hour.
Ice damming and what it means for the attic wiring
Icicles along the gutter line are not just a roof issue. They mean warm air is escaping into the attic, melting snow on the roof, and refreezing at the eave. The electrical question is: what is up there with that warm air and meltwater?
In an attic with active ice damming, the wiring concerns are:
- Knob-and-tube in older homes. Hamilton century homes and post-war Burlington bungalows sometimes still have K&T in the attic that the home inspection caught or partly caught. K&T plus blown-in insulation plus attic moisture is the worst combination.
- Junction boxes without covers. Attic boxes that should have covers but do not - common finding in older wiring - are exposed to attic humidity that condenses inside them.
- Recessed lights penetrating the ceiling plane. Non-IC-rated cans pre-1990 are an attic insulation problem; IC-rated post-1990 are fine. Worth knowing which yours are before you have insulation added.
If your roofline is icing this winter, the immediate fix is roof and insulation work. The attic electrical inspection is the second visit. Do not put the insulation people up there until you know what they are about to bury.
The dryer vent and the lint conversation
This is the call we get most often from new homeowners who closed in fall. The dryer ran fine for the first three loads and is now taking two cycles to dry a load. The vent is partly blocked - usually with lint, sometimes with a bird nest from the previous summer, occasionally with crushed flex duct behind the laundry machine. The previous owner knew the warning signs and managed around them; you do not, yet.
The electrical piece of the conversation:
- A dryer working against a partly-blocked vent runs longer, hotter, and pulls more current. The 30A 240V dryer circuit handles it, but the dryer's heating element and motor age faster.
- A blocked vent is the leading cause of laundry-room fires. The fire usually starts at the lint, not the wiring, but the result is the same.
- The fix is a vent cleaning - not electrician work - but the dryer receptacle and pigtail are worth inspecting at the same time. A discolored or pitted pigtail connection at the back of the dryer is a sign the circuit has been working harder than it should.
The basement humidity around the panel
Walk to the panel. Look at the wall behind it. The first winter is when you find out whether the basement keeps a steady humidity year-round or whether the wall sweats in January. Steel panel cabinet on a sweating wall develops rust streaks down the side, then on the inside of the cabinet, then on the bus.
What to check, without opening the panel:
- Rust streaks down the outside of the panel cabinet. Especially at the bottom edge and the conduit entries.
- Moisture on the wall behind or beside the panel. If the wall is damp to the touch in January, the panel is in a worse spot than the previous owner let on.
- Any standing water within 3 metres of the panel. Spring melt and sump pump backups make basements complicated; the panel needs to be above the worst case.
If the panel is in a damp corner, the conversation is dehumidification first, vapour barrier on the wall second, and panel relocation only as a last resort. We see the relocation come up two or three times a winter.
The sump pump test - January, not April
Most home inspectors test the sump pump by pouring a bucket into the pit. That confirms the float and the motor run; it does not confirm the discharge line is clear, that the check valve seats, or that the pump actually evacuates the pit before water rises further. January is the right month to do a deeper test before the spring thaw:
- Verify the pump cycles on float lift
- Verify water leaves the discharge line outside (walk outside and look)
- Verify the check valve seats (listen for backflow into the pit after shutoff)
- Check whether the pump is plugged into a dedicated receptacle on its own circuit (it should be) and whether that receptacle is GFCI-protected (in many older basements it should not be - sump pumps are an exception in newer code, but installations vary)
We covered the broader case in our sump pump backup battery post; for new homeowners the priority is simply "does the one I have work the way the previous owner said it did." Sometimes yes, sometimes the float is gummed up and nobody noticed for two years.
The mysterious chirp on the second floor
Every fall we field this call from a recent buyer. A smoke or CO alarm chirps every 30 to 60 seconds. The previous owner clearly knew it had been doing this and never replaced it. The first check is the backup battery. If a fresh battery does not fix it, the alarm is at end-of-life - smoke detectors are 10 years from manufacture, CO detectors 7-10. Check the manufacture date sticker on the back of the unit. A house bought in October frequently inherits two or three alarms that all hit end-of-life around the same calendar year because the previous owner installed them as a set.
What is different in your house versus the average
The previous owner ran the house in a specific way that worked for them and may not work for you. Some examples we routinely surface in first-winter inspections:
- The space heater corner. Many sellers used a portable space heater in one room rather than fix a cold spot. You move in, plug the same heater in, and discover the breaker trips - because the previous owner had quietly stopped using anything else on that circuit while the heater was running. We covered that pattern in our century home winter electrical post.
- The hot tub or pool that was "winterized." If the property had a hot tub, sauna, or pool the previous owner shut down for winter, the electrical disconnect should be in the off position and the GFCI should be verified before spring startup. Worth knowing what is parked under that gazebo cover before April.
- The detached garage or workshop subpanel. Many properties have a subpanel out back that the previous owner used for woodworking, EV charging, or a workshop. Walk out there. Confirm the disconnect is accessible and works. Confirm the subpanel is labelled.
The list that bumps up to "book before spring"
- Heat trace you cannot locate or confirm is working
- Active ice damming on a roof with knob-and-tube anywhere in the building
- Rust or moisture on the panel cabinet
- Smoke or CO alarms at end-of-life
- A sump pump you have not personally cycle-tested
- Any item the home inspection report flagged with "monitor" or "further evaluation"
- A breaker that has tripped during the cold snap and you do not know which circuit it serves
When to call us
The first-winter inspection visit is a flat diagnostic fee with a written report. We cover the items above plus a thermal scan of the panel under representative load, a torque check on critical landings, and any items from the home inspection report you want a second opinion on. We do these across Hamilton, Burlington, Dundas, Waterdown, Ancaster, Stoney Creek, and Oakville. Spring-focused walk-throughs for long-time homeowners are covered separately in the spring electrical inspection post later this quarter. Request a first-winter inspection and we will get on your schedule before the next cold snap.