Calgary does not ease into winter. One week you are raking leaves in a light jacket, and the next you are scraping frost off your windshield at minus twenty-five. Add in the wind that rolls off the foothills, the sudden Chinook swings that push temperatures up and down within hours, and months of near-constant heating, and your windows and doors take on a workload most homeowners never think about until something goes wrong. If you want to prepare windows for winter properly, the work has to start before that first hard freeze, not after you notice a curtain moving on its own at 2 a.m.
This guide walks through a complete, practical process to prepare windows for winter in a Calgary home: how to inspect them, how to find where cold air is sneaking in, how to seal and weatherstrip what can be repaired, how to deal with condensation and frost, and how to know when a problem has moved past a DIY fix and into repair or replacement territory. None of this requires guesswork. It requires a system, and that is exactly what this article gives you.
Quick answer: To prepare windows for winter, inspect every frame and pane, seal stationary gaps with fresh caulking, replace worn weatherstripping on moving parts, clean and align door and patio door tracks, and address condensation before the first hard freeze. Start this work in September or early October in Calgary, while temperatures are still mild enough for caulk to cure and repairs to be scheduled before peak winter demand.
By the end, you will know how to:
- Inspect windows and doors before winter sets in
- Find drafts and air leaks with simple, safe methods
- Seal stationary gaps correctly
- Replace worn weatherstripping on windows and doors
- Reduce condensation and frost on interior glass
- Prepare patio and sliding doors for the cold months
- Use temporary insulation the right way
- Decide between repair and replacement
- Understand whether winter window replacement is even possible in Calgary
When Should You Prepare Windows for Winter in Calgary?
Fall window maintenance in Alberta is not a one-weekend job you can put off. Calgary’s shoulder season is short, and the city has a habit of jumping from mild afternoons to sudden cold snaps within days. Preparing home for winter Alberta style means working with that unpredictability instead of against it, and most Alberta cold-weather window tips you’ll find agree on one point: earlier is always better than later.
Start Before Calgary’s First Sustained Cold Snap
Caulk and sealants need specific temperature ranges to cure properly. Most exterior caulking products perform poorly, or fail to bond at all, once daytime highs drop below five degrees Celsius. That gives Calgary homeowners a fairly narrow window, so to speak, to get sealing work done correctly.
There are practical reasons to start early:
- Caulk and sealant need above-freezing conditions to cure
- Weatherstripping is far easier to install without gloves and numb fingers
- Repairs on tracks, hardware, and frames go faster without snow and ice in the way
- Early inspection gives you time to book a professional if something needs more than a DIY fix, rather than waiting weeks during peak season
Doing this Calgary winter home prep work in September or early October, rather than late November, is the difference between a smooth process and a rushed one.
Don’t Wait Until You Feel a Draft
Some window and door problems do not announce themselves until the temperature drops. A gap that felt like nothing in August can feel like an open window in January because cold air moves differently than warm air, and pressure differences increase as the temperature gap between inside and outside grows.
Watch for these early warning signs before winter fully arrives:
- Cold spots near the window frame or sill
- Curtains or blinds that move slightly with no fan or vent nearby
- A noticeable draft when standing close to the glass
- Condensation developing inside the glass
- Frost appearing on the corners of the window
- Difficulty locking or fully closing a window
- Fogging or haze between the panes of glass
- Water pooling or staining around the frame
If you notice any of these now, do not wait for a bigger cold snap to deal with it.
How to Prepare Windows for Winter: Start With a Complete Inspection
You must understand what you are dealing with before you caulk anything, seal anything, or purchase a single roll of weatherstripping. A thorough inspection is the first step, not an optional extra, to properly prepare windows for winter.
Inspect the Inside and Outside of Every Window
Walk the exterior and interior of your home and check each window individually. Windows in the same house can be in completely different condition depending on sun exposure, wind direction, and age.
Check each of these areas:
| Area | What to look for |
| Frame | Cracks, warping, soft spots, discoloration |
| Sash | Alignment, movement, gaps when closed |
| Glass | Fogging, cracks, chips, condensation between panes |
| Trim | Separation from the wall, gaps, water staining |
| Caulking | Cracking, shrinking, peeling, missing sections |
| Weatherstripping | Compression, tearing, brittleness |
| Locks and latches | Ability to fully engage and hold the sash tight |
| Tracks | Debris, dirt buildup, ice damage from last winter |
| Sills | Rot, soft wood, paint failure |
| Drainage or weep areas | Blockages from dirt, leaves, or debris |
Check for Cracks, Gaps and Deteriorated Seals
Run your fingers along the caulking line on the interior and exterior. Brittle or cracked sealant will often flake or crumble under light pressure. Look closely for:
- Cracked or dried-out caulk
- Missing sections of weatherstripping
- Visible daylight or gaps around the frame
- Warped or swollen frame material
- Water staining on the sill or nearby wall
- Signs of rot or soft, spongy wood
Check Window Operation Before Winter
A window may function poorly even though it looks good.. Open, close, lock and unlock every window in the house and pay attention to how it feels.
Signs of a problem include:
- Sticking when opening or closing
- A sash that does not sit flush against the frame
- Loose or wobbly hardware
- A window that locks but still has visible play or movement
If a window will not pull tight and seal properly against the frame, drafts are almost guaranteed once temperatures drop.
How to Find Where Cold Air Is Coming Through Your Windows
To find where cold air is coming through a window, run your hand or a strip of tissue paper along the sash and frame on a cold or windy day and note exactly where you feel movement or a temperature change. Drafty windows rarely leak evenly around the whole frame. The air usually finds one specific weak point, and identifying that point is what makes the fix effective instead of guesswork.
Safe Ways to Detect Window Air Leaks
You do not need special equipment to detect window air leaks. These simple methods work well in most Calgary homes:
- Hand test: Slowly run your open hand around the frame and sash on a cold, windy day. A sudden temperature change usually marks the leak.
- Tissue or paper test: Hold a thin strip of tissue paper near the edges of the window. Movement indicates airflow.
- Visual inspection: Look for visible gaps, especially where the sash meets the frame.
- Curtain and blind movement: On a windy day, watch for slight movement with no other airflow source in the room.
- Frame and sash check: Feel along the entire perimeter, not just the bottom, since leaks often occur at the top corners too.
Avoid using an open flame, lighter or candle as a routine test. It is unnecessary and unsafe, and the methods above are just as effective.
Is the Draft Coming From the Sash or the Frame?
In short: a draft near the moving sash usually points to worn weatherstripping, while a draft near the stationary frame usually points to failed caulking. This distinction matters because it determines what actually needs to be fixed.
- Draft around the moving sash: Usually points to worn or compressed weatherstripping, or a misaligned sash that no longer seals tightly.
- Draft around the stationary frame: Usually points to failed or missing caulking around the perimeter.
- Draft around the entire installation perimeter: May point to a sealing or installation issue where the window meets the wall.
- No obvious draft, but the glass itself feels very cold: This is often a thermal performance issue rather than an air leakage issue, meaning heat is passing through the glass or frame material itself.
Knowing which category your window falls into saves time, money, and frustration before you start any repair work.
Seal Window Gaps Before Calgary’s Coldest Weather
Once you know where the problem is coming from, sealing is often the next logical step, provided the issue is coming from a stationary gap rather than a moving component. This is one of the most effective ways to seal windows for winter without spending money on replacement.
Should You Caulk Your Windows on the Inside or Outside for Winter?
Caulk the exterior first, since that is where most leaks originate; add interior caulking only on stationary joints that are still leaking after the exterior seal is fixed. The right choice ultimately depends on what is actually causing the leak.
Exterior window caulking addresses the seal between the window frame and the exterior wall or siding. This is typically where weather, UV exposure and freeze-thaw cycles cause the most damage over time, and it is usually the first place to check.
Interior sealing can help with air leakage on the room side of the window, but it should be used carefully. Sealing every interior gap without understanding the window’s design can trap moisture in places it needs to escape, or block ventilation paths that prevent condensation buildup.
A useful rule: caulk stationary components, such as the frame-to-wall joint. Do not caulk moving components, drainage holes or weep openings, since these are designed to let water and moisture escape. Sealing them shut can cause bigger problems than the draft you started with.
How Do You Know When Window Caulking Needs Replacement?
Window caulking needs replacement when it cracks, shrinks, peels, or separates from the surface it was applied to. Old caulking does not fail gracefully. Watch for:
- Cracking along the caulk line
- Shrinking that leaves gaps on either side
- Peeling away from the frame or wall
- Brittleness that crumbles when pressed
- Visible separation between the caulk and the surface
If you see two or more of these signs, plan on removing the old caulk completely and applying a fresh bead rather than caulking directly over the damaged material.
Why Should You Address Water Intrusion Before Winter?
Water intrusion should be fixed before winter because Calgary’s freeze-thaw cycles turn small moisture problems into large ones fast. Water that gets behind a frame or into a wall cavity can freeze, expand, and cause damage that is far more expensive than the original leak. If you notice staining, softness, or any sign of water intrusion around a window, deal with it before winter, not after the first heavy snowfall.
Replace Worn Weatherstripping on Windows and Doors
Installing a compressible strip of foam, rubber, vinyl, or felt around a window or door’s moving parts to stop air leaks where caulking cannot is known as weatherstripping. While caulk seals stationary joints, weatherstripping seals moving parts, which is why it wears out more quickly and requires more frequent maintenance.
What Is the Best Weatherstripping for Windows?
There is no single best weatherstripping for windows. The right choice depends on the window type, the size of the gap and how the sash moves.
- Foam tape: Affordable and easy to install, best for smaller gaps
- Rubber seals: Durable and good for larger gaps or older frames
- Tubular seals: Good compression for uneven surfaces
- V-seals: Common on sliding sashes, allow smooth movement while sealing
- Felt: Traditional option, less durable in extreme cold but still used on some older windows
Measure your gap before buying, and check the material against Calgary’s temperature range. Some cheaper foams become brittle and crack in extreme cold within a single season.
How Does Weatherstripping Stop Drafty Windows?
Weatherstripping stops drafts by compressing tightly when the window closes, sealing moving parts that caulking cannot address. This is exactly why a window with perfect caulking can still be a drafty window if the weatherstripping around the sash has worn out or compressed permanently.
How Do You Winterize a Front Door With Weatherstripping and a Door Sweep?
A drafty front door fix often comes down to a handful of components that wear out gradually and get ignored until winter makes the problem obvious.
Check and replace as needed:
- Weatherstripping around the door perimeter
- The door sweep along the bottom
- The threshold, checking for gaps or wear
- The frame, checking for warping or separation
- The lock and latch, checking for full engagement
- Overall alignment, since a door that has shifted slightly on its hinges will never seal properly no matter how new the weatherstripping is
A door sweep replacement is one of the cheapest, fastest winter prep jobs available, and it makes a noticeable difference in comfort near entryways.
Prepare Your Patio and Sliding Doors for Winter
Patio and sliding doors are often overlooked during winterizing doors for cold weather projects, yet they are some of the largest, least insulated openings in a Calgary home.
Clean and Inspect the Sliding Door Track
Dirt, debris and old ice buildup in the track prevent the door from sliding smoothly and can stop it from closing fully. Clean the track thoroughly and check for:
- Dirt and debris buildup
- Leftover ice or water damage from last winter
- Smooth roller movement without catching or dragging
Check Rollers, Alignment and Locks
A patio door that does not glide evenly is often not sealing evenly either. Misaligned rollers can leave one side of the door slightly open at the seal, even when the door appears closed and locked. Test the lock fully and confirm the door pulls snug against the frame on all sides.
Inspect the Patio Door Weatherstripping
Look closely for:
- Compression that has flattened permanently and lost its seal
- Physical damage or tearing
- Gaps where the seal no longer touches the frame
- General wear from years of opening and closing
Patio door weatherstripping tends to wear faster than window weatherstripping simply because of how frequently the door is used.
How to Prepare Windows for Winter When You Have Condensation or Frost
This is one of the most common winter complaints Calgary homeowners deal with, and it is also one of the most misunderstood. To prepare windows for winter and actually solve condensation problems, you need to understand what is causing them first.
Why Is There Ice and Condensation on the Inside of My Windows?
Ice and condensation form on the inside of windows when warm, moist indoor air meets the cold glass surface, causing the moisture to condense, and in extreme cold, to freeze into frost. This is a humidity and temperature problem at the glass surface, not a sign that the window itself is broken.
Common contributing factors:
- High indoor humidity levels, often worse in winter when homes are sealed tighter
- Very cold glass surface temperatures
- Air leakage bringing in cold air right at the glass edge
- Poor thermal performance of the glass or frame itself
Condensation on the Glass vs Moisture Between the Panes
This distinction matters more than most homeowners realize.
Condensation on the room side of the glass is generally related to indoor humidity levels meeting a cold surface. This can often be managed by adjusting humidity and airflow in the home.
Fogging or haze between the panes of glass is a different issue entirely. This usually indicates a failed seal on an insulated glass unit, allowing moisture to get trapped between the panes where it cannot be wiped away. This is not a humidity problem. It is a sign the sealed unit itself needs attention.
What to Do If Your Windows Are Already Freezing
If you are already seeing frost or ice building up on the inside of your windows, take these steps:
- Wipe away excess moisture safely without damaging the frame or finish
- Do not let ice accumulate and melt repeatedly, since this can damage the sill and surrounding wall
- Check and adjust indoor humidity levels
- Inspect for drafts around the frame that may be making the glass colder than it should be
- Determine whether the moisture is on the room side, the exterior side, or trapped between panes
- If the problem persists after addressing humidity and drafts, arrange a professional assessment
Temporary Ways to Insulate Windows for Winter
Not every window problem needs a permanent fix right away. There are legitimate, temporary methods for insulating windows for winter that can bridge the gap, especially for older windows that are still structurally sound.
Does Window Insulation Shrink Film Actually Work?
Yes, window insulation shrink film works, but only within limits. The plastic sheeting, applied with double-sided tape and shrunk tight with a hair dryer, creates a small pocket of still air between the film and the glass. That air pocket reduces convective heat loss and can noticeably cut drafts on older or single-pane windows.
What it does well:
- Reduces air movement directly against cold glass
- Adds a modest insulating air layer
- Is inexpensive and simple to apply
Its limitations:
- It is a temporary, seasonal solution, not a permanent fix
- It cannot be used on windows you need to open during winter
- It does not address underlying weatherstripping or caulking problems
- It will not meaningfully help if the core issue is a failed seal or serious thermal performance problem
Think of it as a helpful supplement, not a substitute for proper sealing and weatherstripping.
Thermal Curtains, Blinds and Other Window Treatments
Beyond film, several window treatments help retain heat:
- Thermal curtains: Heavier, often lined fabric that reduces heat loss at night
- Cellular shades: Honeycomb structure that traps air for added insulation
- Blinds: Provide modest insulation and light control
- Shutters: Interior shutters can add a meaningful insulating layer when closed
Should You Leave Your Window Blinds Open or Closed During Winter Days?
When it’s sunny outside, open your blinds; at night, close them. Open blinds allow solar heat gain during the day, particularly on south-facing windows, which can actually help warm the space. Closing blinds, curtains, or shades when the sun sets helps maintain the heat and lessens the chill that comes from cold glass. Orientation, sun exposure, and the glass’s current level of insulation still determine the best course of action.
What About Old or Original Windows?
Many Calgary homes, particularly older character properties, still have original windows that homeowners are not ready to replace, whether for budget or preservation reasons.
Can You Get Through Another Calgary Winter Without Replacing Old Windows?
In many cases, yes, with the right layered approach:
- Seal stationary gaps with fresh caulking
- Replace worn weatherstripping on moving parts
- Repair any hardware or alignment issues
- Add secondary glazing or temporary insulation where needed
- Assess overall performance and decide whether replacement makes sense down the road
What Are Storm Windows and Secondary Glazing?
Secondary glazing is an added layer, installed between the window and the room or between the window and the outdoors, that creates an insulating air gap similar in concept to a double-pane window. Storm windows are the most common form of secondary glazing used in older Calgary homes.
Options include:
- Interior storm windows, installed on the room side
- Exterior storm windows, installed outside the existing window
- Acrylic or plexiglass inserts, custom fit to the window opening
- Removable secondary glazing, allowing seasonal installation and removal
What Are the Trade-Offs of Temporary Winter Window Solutions?
Every temporary solution comes with compromises worth weighing:
| Factor | Consideration |
| Appearance | May be visible from inside or outside |
| Accessibility | Some solutions block the window from opening |
| Installation | Time and effort required each season |
| Storage | Removable options need off season storage |
| Durability | Materials degrade with repeated seasonal use |
| Effectiveness | Helps with comfort but has real limits |
| Maintenance | Some options need cleaning or reapplication yearly |
When Window Insulation Isn’t the Real Problem
Sometimes the issue people describe as a window problem is actually something else entirely, and understanding the difference prevents wasted money and effort.
What Is the Difference Between Air Leakage and Heat Transfer?
Air leakage is physical: cold air enters the home through a gap, crack or worn seal, and you can usually feel it directly. Heat transfer is different: heat moves through the glass and frame material itself, even with zero air leakage, so a window can be completely sealed and still feel cold simply because the glass or frame does not resist heat loss well.
Glazing type is what determines heat transfer performance. Double-pane windows outperform single-pane. Triple-pane performs better still in extreme cold climates like Calgary’s. Low-E glass coatings and insulated glass units also play a role in overall thermal performance. If sealing and weatherstripping have not solved a persistent cold feeling near a window, heat transfer through the glass itself, rather than air leakage, may be the actual cause.
How Do You Check for Window Installation Problems?
Not every window problem originates with the window itself. Installation issues can include:
- Gaps around the trim where the window meets the wall
- A consistently cold perimeter even with good caulking
- Uneven sealing from the original installation
- Air entering around the rough opening rather than the window unit
- Water intrusion tied to flashing or sealing at installation
Replacing a window will not fix a problem that was never about the window in the first place. This is why an accurate diagnosis matters before committing to a repair or replacement decision.
Repair or Replace? How to Decide Before Winter
This is the point where many Calgary homeowners have to make a real decision, and it should be based on what the inspection actually found, not guesswork.
When Is a Window Repair Enough?
A window repair is usually enough when the problem is isolated and specific, such as:
- Worn weatherstripping
- Damaged or loose hardware
- A minor alignment issue
- Deteriorated caulking
- A single failed insulated glass unit (IGU)
- An isolated draft with a clear cause
- A minor sealing gap around the frame
If you’re dealing with any of these, a window repair can often resolve the issue without the cost of full replacement.
What Are the Signs Your Windows Need Replacement?
Replacement becomes the more sensible option when problems are widespread or recurring, including:
- Persistent drafts that return after repairs
- Multiple failed insulated glass units (IGUs) across the home
- Severe frame deterioration, rot or warping
- Poor operation that repair cannot correct
- Repeated repair needs on the same window
- Consistently cold interior glass across several windows
- Overall poor thermal performance despite good sealing
Failed Double-Pane Window Seal: Repair or Replace?
A failed seal on a double-pane window causes fogging or haze between the panes because moisture has gotten trapped inside the insulated glass unit (IGU). In most cases, only the IGU itself needs replacing, not the entire window frame and hardware. This is a meaningfully less expensive fix, and it is one of the most common repairs homeowners with otherwise sound frames need. Understanding window repair costs in Calgary can help you compare this option against full replacement before making a decision.
Can You Replace Windows in the Middle of a Calgary Winter?
This question comes up every year once the temperature drops and someone discovers a serious problem they were not expecting.
Is Winter Window Replacement Possible?
Yes, replacing windows in winter is possible in Calgary, and experienced installers do it regularly. It does require more careful planning than a summer installation.
Key factors that matter:
- Weather conditions on installation day, since extreme cold or heavy snow can affect scheduling
- How the installation is scheduled, often working in sections to limit how long any opening is exposed
- Managing temporary exposure of the opening during the swap
- Installer experience with cold weather installation techniques
- Proper sealing methods suited to lower temperatures
- Product specifications that confirm suitability for cold weather installation
When Waiting Until Spring May Not Be the Best Choice
Some situations make waiting a poor decision:
- Significant, ongoing drafts affecting comfort and heating costs
- Active water intrusion around the frame
- A broken or failed sealed unit letting cold air straight through
- Severe frame damage that is only getting worse
- Major comfort problems in daily living spaces
If you’re weighing this decision, understanding current window replacement costs in Calgary can help you plan realistically rather than delaying based on price uncertainty alone.
When Temporary Winter Measures Make More Sense
If the window is fundamentally sound and the problem is manageable, temporary measures such as film, weatherstripping or secondary glazing can bridge the gap until a spring replacement, when scheduling and site conditions are simpler.
Calgary Winter Window and Door Preparation Checklist
Use this checklist to work through your entire home systematically.
Windows
- Inspect interior and exterior frames
- Check caulking condition
- Check weatherstripping condition
- Test locks and latches
- Check window operation, open and close
- Clean tracks and sills
- Check drainage and weep areas
- Look for condensation or frost
- Check for fogging between panes
- Check for drafts around the frame and sash
- Inspect for water damage or staining
Exterior doors
- Inspect weatherstripping
- Check the door sweep
- Check the threshold
- Test the lock and latch
- Check overall alignment
- Inspect the frame seal
Patio doors
- Clean the tracks
- Check the rollers
- Check alignment
- Test the lock
- Inspect the weather seals
When to Call a Calgary Window Professional
Call a Calgary window professional when you cannot find or fix the source of a draft, a window or door will not seal or lock properly, or you see fogging between the panes of glass. There is a point where DIY prep reaches its limit, and knowing when to make that call saves both time and money.
More specifically, it is worth reaching out for professional help when:
- You cannot identify the source of a draft after a thorough inspection
- A window will not close or lock correctly
- Glass is fogging or hazy between the panes
- A frame is visibly warped or damaged
- Water is entering around a window or door
- Interior frost keeps returning despite addressing humidity
- Repairs have not resolved the underlying problem
- Multiple windows are showing the same performance issue
A qualified window draft repair assessment can pinpoint exactly what is happening rather than leaving you to guess season after season. And when the numbers stop making sense for another round of repairs, energy-efficient windows may end up costing less over time than continuing to patch the same problem. For entry doors and patio doors that are past the point of weatherstripping and sweeps, door services can address alignment and sealing issues that DIY fixes cannot fully resolve.
Frequently Asked Questions About Preparing Windows for Winter
How do I stop cold air from coming through my windows in winter? Start by identifying whether the draft comes from the sash or the frame. Reapply caulking to stationary gaps and replace worn weatherstripping around moving parts. If cold air persists after both are addressed, the glass or frame itself may have a thermal performance issue rather than an air leak.
Should I caulk my windows on the inside or outside for winter? Exterior caulking addresses the seal between the frame and the wall, which is usually the source of the leak. Interior sealing can help too, but avoid caulking drainage paths or operable parts, since they are designed to let moisture escape safely.
Does window insulation shrink film actually work? Yes, but only within limits. It reduces drafts by creating a still air pocket against the glass, which helps on older or single-pane windows. It is a temporary, seasonal solution and cannot be used on windows you need to open during winter.
What is the best weatherstripping for drafty front doors? It depends on the gap size and door type. Foam works for small gaps, rubber and tubular seals handle larger or uneven gaps better, and a proper door sweep addresses the bottom edge that foam alone cannot fix.
Why is there ice and condensation on the inside of my windows? Ice and condensation form when warm, moist indoor air meets cold glass and condenses, sometimes freezing in extreme cold. High indoor humidity, air leakage and poor thermal performance of the glass all contribute. Fogging between the panes, rather than on the room side, points to a failed insulated glass unit (IGU) instead.
How can I tell if my double-pane window seals have failed before winter? Look for haze, fog or moisture trapped between the panes that does not wipe away with a cloth. This is different from surface condensation and usually means the insulated glass unit (IGU) needs replacing, often without needing to replace the entire window.
Should I leave my window blinds open or closed during winter days? Open blinds during sunny daylight hours on south-facing windows to capture solar heat gain. Close them at night to retain that heat and reduce the chill from cold glass. Orientation and sun exposure both affect the ideal approach.
Can you replace windows in the middle of a Calgary winter? Yes, experienced installers handle winter window replacements regularly with proper planning around weather, scheduling, and sealing methods suited to cold conditions. Active drafts, water intrusion or failed units are often good reasons not to wait until spring.
Need Help Getting Your Windows Ready for a Calgary Winter?
If your inspection turned up a problem you cannot confidently resolve on your own, that is exactly the point where professional help makes sense.
- Dealing with drafts, damaged seals, hardware, or fogged glass? A window repair can often solve the problem without a full replacement.
- Facing windows that are severely deteriorated or consistently underperforming no matter what you try? It may be time to look at window replacement options built for Calgary’s climate.
- Struggling with a drafty entry door or a patio door that will not seal properly? Our door services, including patio doors, can restore a proper seal before the cold sets in.
Whatever your inspection uncovered this fall, contact Canuck Windows and let’s get your home ready for whatever this Calgary winter brings.
