Opening up your main floor this winter: planning a wall removal

An open main floor is one of the few structural projects that doesn’t depend on the weather. Nothing has to be dug, the roof stays on and, for an interior wall, the outside of the house is never opened. That makes the cold months a natural time to do it, and many households like the idea of a brighter, more connected main floor for the long evenings indoors.

Winter also gives you time to plan properly. The parts of a wall removal that take the longest to arrange are rarely the demolition. They’re the decisions and paperwork that come first: finding out what the wall carries, getting an engineer to look at it, drawing the opening and getting a permit. Starting those in the fall means the work itself can be booked for the weeks that suit your family, not the weeks that happen to be left.

The practical details of the job itself, from shoring to beam types to patching, are on our load-bearing wall removal page. This guide is about getting the planning right, and the extra things to think about when the job happens in winter.

These steps happen in roughly this order on most open-concept projects. How long each one takes depends on the house, the engineer’s schedule and the city’s review, so we give you dates once we know what the wall involves.

1. Decide what the opening is for

   Write down what you want the new space to do: see the kids from the kitchen, fit a bigger table, let light from the back windows reach the front room. That brief decides how wide the opening needs to be, and sometimes shows that a partial opening does the job.

2. Find out what the wall carries

   We check the framing above and below, the direction of the joists and anything stacked on top of the wall upstairs. That tells us whether the job is a simple partition removal or a structural change that needs a design.

3. Book the engineer’s site visit

   If the wall is bearing, an engineer designs the beam, the posts and the support down to the foundation. The visit goes faster when the basement, attic and upstairs rooms are easy to get to.

4. Settle the finish decisions

   Choose the beam style, ceiling lighting, where heating registers go and how the floor will be patched before the drawings are finished, so the design only has to happen once.

5. Drawings and permit

   Removing a bearing wall is a structural alteration, so the drawings go to your city with a permit application. Review periods are counted in business days, and statutory holidays don’t count.

6. Book the work around your calendar

   Once the permit is in hand, we schedule demolition, shoring, the beam and the patching around the dates that matter to you, including the holidays.

A structural engineer is designing for the house as it really is, not as it looks from the living room. You can make the site visit far more useful by having these ready.

• Clear access to the basement directly under the wall, including any finished ceiling that may need a small inspection opening
• A way into the attic, especially in a bungalow, so the roof framing above the wall can be seen
• The upstairs layout, with any walls, bathtubs or heavy furniture sitting over the wall
• Any drawings, permit records or renovation history you have for the house
• Photos of the wall from both sides, and of the floor and ceiling where it meets them
• The opening width and height you’re hoping for, and whether you’d accept a short wall stub or a post

Winter adds one structural question that summer doesn’t: what’s on the roof. In many older bungalows with site-built roofs, braces from the roof framing land on the centre wall, so part of the roof’s weight, snow included, comes down through it. In houses built with roof trusses, interior walls usually carry little or nothing from the roof, but the attic still needs a look to be sure.

The permanent beam isn’t a seasonal design. The Ontario Building Code sets design snow loads for each part of the province, and the engineer uses that load for your location whether the work happens in July or January. Temporary shoring is different, because it carries whatever is actually up there on the day the wall comes out.

So when the wall is part of the roof’s support, ask who is designing or setting the temporary supports and whether they’ve allowed for snow on the roof. Keep the attic access clear for the whole job, and expect the shoring to stay in place until the new beam and posts are fully installed and connected. If a heavy snowfall arrives mid-job, that’s a reason to check the temporary supports again, not to hurry.

Interior walls are where houses hide their services, and in winter some of those services can’t be switched off for long. A return-air duct or a supply run inside the wall is common in GTA houses, and in January the furnace needs to keep running while it’s rerouted. We plan the new duct route before demolition, keep the gap in service as short as possible and use temporary electric heat in the work area if a run has to be disconnected for a while.

A plumbing stack inside the wall is a bigger question, because moving it means new drain and vent routes and plumbing work on the permit. A thermostat on the wall needs a new home and its wiring rerouted. Switches, outlets and any circuits passing through the wall are moved by a licensed electrician, and the Electrical Safety Authority inspection has to happen before the ceiling and walls are closed again.

If you already know what’s in the wall, mention it before the engineer’s visit. A floor register near the wall, a bathroom directly above it or a thermostat on it are all clues, and they can change the beam design or the opening width.

The most common cause of a second round of design is a finish decision made too late. Whether you want the new beam hidden in the ceiling or showing below it changes the engineering, so settle it first. Our service page explains the difference between a flush beam and a dropped beam if you’re still deciding.

Lighting is the next one. Once the wall is gone, the old room lights may sit in odd places, and a new open ceiling usually wants a new lighting plan. Pot lights need clear space above the ceiling, so their positions have to work with the joists and the beam. Heating registers and returns that were in or near the wall need new spots too.

Then there’s the floor. Where the wall stood there’s a strip with no finished flooring, and how it’s handled is a design choice: weaving in matching boards, running a new floor through both rooms, or a deliberate threshold. If you’re matching hardwood, order the boards early and let them sit in the house before installation. Winter air is dry, and our guide to hardwood floors in heating season explains why that matters.

A wall removal is noisy and dusty for part of the job and quiet for the rest. In Toronto, the City’s noise bylaw doesn’t allow clearly audible construction noise on Sundays or statutory holidays, so days like Christmas, Boxing Day and New Year’s Day are off the table for demolition anyway.

It’s easy to forget that a beam long enough to span a living room has to get into the house first. Engineered wood beams and steel beams arrive as single long pieces, and the route from the truck to the room needs to be thought through: a cleared driveway, a path free of ice and a doorway or window the beam can actually pass through. A turn in the front hall that’s fine for a sofa may not work for a long beam.

In summer, taking a window out for an hour to slide a beam through is no big deal. In January it means a planned, short opening with the heat in that room managed, so we work out the route during the site visit, before the beam is ordered. Steel is heavy, and steel posts and plates may need a few people and some patience on icy steps.

The same goes for the debris coming out. Plaster and lath from an older Toronto house is heavy and bulky, and a bin parked on the road in Toronto needs a Street Occupation Permit. Our guide to renovating in winter covers bins, salt and access in more detail.

Read how the wall removal itself works, compare quotes on the same scope and see what else to plan for if the work happens this winter.