Most Ottawa contractors won't tell you this out loud: winter is actually a great time to renovate the inside of your house. Crews are less booked, lead times shrink, and you'll often get sharper pricing on labour. The trade-off is that winter punishes sloppy planning.
Snow doesn't care about your schedule. Neither does a frozen pipe or a sheet of drywall that sat in a cold trailer for three days before install. After 20 years of running winter renos in Ottawa, I can tell you the projects that go smooth in January look very different in the planning stage than the ones that go smooth in June.
Here's the homeowner side of the prep, what to ask your contractor, and the parts of a renovation that simply cannot happen between November and April in this climate.
What Can and Cannot Be Done November to April
Ottawa winter conditions, generally December through March, shut down a specific list of work. Plan around it.
Cannot happen in true winter:
- New foundation pours, footings, weeping tile, or anything below frost line (1.2 metres) without heated hoarding, which adds a significant line item to the job
- Exterior parging, stucco, brick, or stone work under 5 degrees Celsius
- Asphalt shingles in sustained sub-zero temps, the self-seal strip won't bond
- Exterior painting, deck staining, or driveway sealing
- Major excavation if the ground is frozen more than 30 centimetres deep
Runs perfectly fine through winter:
- Kitchen, bathroom, and basement renovations (the building is already enclosed)
- Interior framing, drywall, paint, flooring, cabinets, trim
- Permit applications and design work, this is when MyServiceOttawa portal queues are shortest
- Window and door replacements (a swap is a 2 to 4 hour exposure window per opening)
- Additions where the shell was closed in before snow flew
Heating During Demo
The minute we start opening exterior walls or removing a window, your house goes from a sealed envelope to a leaky one. Furnace runs harder. Pipes near exterior walls cool down fast.
The plan we put on every winter site:
- Temporary poly walls (6-mil polyethylene, taped to studs and floor) to isolate the work area from the rest of the house
- A dedicated electric construction heater on the work side, sized 5,000 to 10,000 watts depending on space
- Door dams at the work zone entry to keep cold air from rolling out when crews come and go
The homeowner side: turn down the smart thermostat for the work zone, leave kitchen and bathroom cabinet doors open in nearby rooms so warm air reaches the supply lines, and confirm with the contractor that the crew is the last out at the end of every day to verify heat is on.
Pro tip
Buy an inexpensive wireless temperature sensor and put it in the work zone. Check it from your phone overnight. If the reading dips below 5 degrees, call the contractor before you call a plumber.
Frozen Pipe Risk During Renos
The pipes that freeze in Ottawa winter renos are almost never the main ones. They're the kitchen sink supply running through an exterior wall, the half-bath rough-in someone capped and forgot, or the laundry line in a knee wall that lost its insulation when drywall came down.
Three rules we follow on every winter project:
- Any plumbing exposed to an exterior wall during demo gets pipe-wrap insulation reinstalled the same day
- Capped lines are drained, not just shut off. A shut-off valve still leaves standing water that freezes and splits the pipe behind the valve
- The homeowner gets shown where the main shut-off is and a labelled photo on day one
If a pipe does freeze, do not use a torch. A hair dryer, a heat gun on low, or a heating pad wrapped around the pipe is the right call. Then figure out why it froze before you turn the water back on.
Snow Removal and Site Access
Ottawa averages 235 centimetres of snowfall per winter. A 5 a.m. plow run will bury your driveway entrance and the spot where the dumpster sits. A renovation crew that has to spend the first 45 minutes of every day shovelling is a renovation that runs over budget.
The plan we set up before any winter project starts:
- Driveway agreement, who plows when. If you have a residential plow contractor, they need to know there's a dumpster in the driveway and where to push snow around it
- Walkway clearing, a clear path from the driveway to the front door, salted, before the crew arrives at 7:30 a.m.
- Material staging area, indoors where possible. Cold drywall, cold tile, and cold cabinets all behave badly
- Dumpster placement on plywood sheets to protect the driveway and to keep the dumpster from freezing to the asphalt
The single biggest cause of winter renovation delay in Ottawa isn't cold. It's the storm that drops 25 centimetres on a Wednesday and shuts down deliveries for 48 hours. Build float into the schedule for two of those per project.
How Cold Material Delivery Affects Install
This is the part nobody talks about. Cabinets, hardwood, tile, paint, and adhesives all have temperature requirements that get violated routinely on Ottawa winter job sites.
Cabinets ride in unheated trucks from Quebec or Ontario manufacturers. They arrive at minus 10 to minus 20 degrees Celsius. If you install cold cabinets immediately, the wood and MDF expand when they warm up to 20 degrees inside, and your perfect tight reveals open into ugly gaps two weeks later.
The right protocol:
- Cabinets get unloaded into the conditioned house, still wrapped, and acclimate for 48 hours minimum before install
- Hardwood and engineered hardwood acclimate 7 days minimum, in their boxes, in the room where they'll be installed
- Paint and adhesives stored above 10 degrees the whole time. A frozen-then-thawed gallon of latex is garbage
- Tile thinset cures slower below 15 degrees, so heaters stay on for 72 hours after a tile install, not just during it
Skipping the acclimation step is the leading cause of warranty callbacks on winter installs. The cabinet shop will not warranty a cold install.
What Homeowners Should Do Before the Crew Arrives
The day-one checklist we send Ottawa clients in November:
- Mark and protect outdoor faucets, hose bibs, and irrigation shut-offs
- Confirm furnace has been serviced this fall, filter is fresh
- Stock 3 bags of ice melt and a snow shovel near the entry the crew will use
- Confirm parking, especially on streets with overnight winter parking bans
- Move outdoor patio furniture, planters, and ceramics to an interior space, frost will crack them
- Locate and label main water shut-off, gas shut-off, and electrical panel
If you're planning a renovation for next winter, start the design and permit conversation with us before October. The crews you want are booked through the cold months by mid-fall. Have a look at how we plan winter basement renovations, where the seasonal advantage is biggest.
The Honest Trade-Off
Winter renos in Ottawa are slightly slower (about 10 percent more calendar time on average), slightly trickier on logistics, and noticeably cheaper because the trades aren't fighting each other for crew availability. If your project is interior work, winter is a good window. If it involves new foundations, an addition shell, or roof work, wait for May.
The contractors who do winter work well know this is half logistics, half discipline. The ones who don't will tell you "we'll figure it out as we go." That's the line that costs you a frozen pipe in February.
Frequently asked questions
What renovation work cannot be done in an Ottawa winter?
Ottawa winter, generally December through March, rules out new foundation pours, footings, weeping tile and anything deeper than the 1.2 metre frost line without heated hoarding. Winter also rules out exterior parging, stucco, brick or stone under 5 degrees Celsius, asphalt shingles in sustained sub-zero temperatures because the seal strip will not bond, exterior painting and deck staining, and excavation when the ground is frozen more than 30 centimetres deep.
Foundations, addition shells and roofing should wait for May.
Which renovations are fine to do during winter?
Kitchen, bathroom and basement renovations run fine through an Ottawa winter because the building is already enclosed. Interior framing, drywall, paint, flooring, cabinets and trim all proceed normally. Window and door replacements work too, since each swap exposes the opening for only 2 to 4 hours.
Winter is also a good time for permit applications and design, when MyServiceOttawa queues are shortest. Winter renovations take about 10 percent more calendar time, but crews are less booked.
How long should cabinets and hardwood acclimate before a winter install?
Cabinets delivered in winter arrive at minus 10 to minus 20 degrees Celsius and need at least 48 hours to acclimate, still wrapped, inside the heated house before install. Hardwood and engineered hardwood need at least 7 days in their boxes in the room where they will go.
Cold cabinets installed right away expand as they warm to 20 degrees, and tight reveals open into gaps two weeks later. Skipping acclimation is the leading cause of winter warranty callbacks.
How do I prevent frozen pipes during a winter renovation?
Pipes that freeze during winter renovations are usually secondary lines, like a sink supply in an exterior wall, a capped rough-in or a laundry line in a knee wall that lost its insulation. Reinstall pipe-wrap insulation on any plumbing exposed on an exterior wall the same day.
Drain capped lines rather than just shutting them off, since standing water behind a valve freezes and splits the pipe. If a pipe freezes, thaw it with a hair dryer or heating pad, never a torch.
How should the house be heated during winter demolition?
Once exterior walls or windows open during winter demolition, the house stops being a sealed envelope. Isolate the work area with 6-mil polyethylene walls taped to studs and floor, run a dedicated electric construction heater of 5,000 to 10,000 watts on the work side, and put door dams at the entry.
Leave cabinet doors open in nearby rooms so warm air reaches supply lines. A wireless temperature sensor in the work zone flags any dip under 5 degrees overnight.
Official references
- Keeping the Heat In, Natural Resources Canada
- Do I need a building permit?, City of Ottawa