Fire Advisory in the Bow Valley:
What Smoke Season Reveals About Your Window Seals

If the house smells like campfire while every window in it is closed, the windows are the problem, not the air outside.

Alberta Wildfire bumped the fire danger for Canmore, Kananaskis Country, the MD of Bighorn and Stoney Nakoda First Nation up from moderate to very high on July 14, 2026, and put a fire advisory in place, as reported by the Rocky Mountain Outlook. Existing fire permits stay valid, new ones are issued case by case, and campfires are still allowed with caution.

An advisory is not a smoke forecast, but it is a good reminder

A fire advisory describes ignition risk, not what the air will look like next week. Vegetation drying out across the Calgary Forest Area is exactly the condition that precedes the smoky stretches the Bow Valley gets most summers.

Those stretches are the real test of a window. When the air quality drops, the standard advice is to close everything and keep it closed, and a window that only mostly closes turns that advice into a suggestion.

Five minutes to find out if your windows seal

You do not need equipment for this. Work around the house one window at a time.

• The paper test. Close and lock the sash on a strip of paper. If it slides out with no drag at all, the compression seal is not doing its job at that point.
• The perimeter check. On a breezy day, run the back of your hand slowly around the sash edge and the frame joint. Moving air means a gap.
• Look at the weatherstripping. Healthy gasket is soft and springs back. Flattened, chalky or shrunk away from the corners means it has given up.
• Try the hardware. A crank window that will not pull tight usually has a worn keeper or a stretched operator arm, not a bad frame.
• Note any fogging. Moisture trapped between the panes is a failed glazing unit. It is a separate problem from air leakage, and it will not get better on its own.

Windows facing the prevailing wind, usually the west and south elevations in Canmore, tend to fail first. Check those before you check the rest.

Window styles do not seal equally

This is the part most people never get told. How a window closes determines how well it holds out smoke, dust and pollen.

The crank operated styles win because the sash is physically pressed into a continuous gasket when you turn the handle. That is why crank out casement units and top hinged awning windows are the default recommendation for west facing rooms and bedrooms in the valley.

Sliding styles are not bad windows. They just rely on brush seals that wear with use, so they need more attention as they age.

Repair or replace

Usually worth repairing

• Worn or missing weatherstripping on an otherwise sound frame
• Cranks, keepers, hinges and locks that no longer draw the sash tight
• Failed exterior caulking and a cracked perimeter seal
• A single fogged glazing unit in an otherwise good window

Most of that falls under straightforward hardware and seal work and costs a fraction of a new unit.

Usually worth replacing

• Frames that have swelled, rotted or racked out of square
• Sashes that will not sit flat against the frame anywhere along the edge
• Several fogged units in the same elevation, which usually means the whole run is the same age
• Single pane or early aluminum units still in place

When more than a couple of windows on one wall are failing at once, doing them together is cheaper per opening than picking them off one at a time. Our approach to whole home window replacement is built around that.

Staying comfortable with everything shut

Closing up for three or four days in July is only tolerable if the house does not overheat. Most homes here rely on cool mountain nights and open windows to shed the day's heat, and smoke takes that option away.

That is where glazing matters. A low emissivity coating with an argon fill keeps solar gain out of the room during the day, which is the difference between a closed house that stays livable and one that does not.

If you are already planning work, upgrading to higher performance glazing packages handles both the January problem and the July one in a single job. It is the same reason Canmore homes see the payback faster than most of Alberta.

Do it now, not during the next advisory

Seal and hardware work is fast in good weather and miserable to schedule the week everybody notices the smoke. Late summer is the quiet window before the fall rush.

We work across Canmore, Banff, Cochrane, Exshaw and the rest of the Bow Valley. Walk your house with the checklist above, note which windows failed, then get in touch for a quote or call us at (825) 804-5236.