Alberta’s weather is known for being extreme. We see sudden temperature changes, dry winds, and low humidity most of the year. These conditions create a unique challenge for homeowners trying to maintain their windows. It becomes especially important when choosing between wood and vinyl materials. While both have benefits, their reaction to dry conditions and seasonal shifts is very different.
Understanding how moisture and temperature impact these materials helps us make better long-term decisions. Let’s walk through how Alberta’s climate affects each type, what signs to watch for, and what actions can prevent costly problems later.
Wood Windows React to Dryness Over Time
Dry air pulls moisture from any organic material. Wood is especially sensitive to this effect, and our climate makes it worse. In the winter, indoor heating removes even more moisture from the air, drying window frames from both inside and out. That change causes shrinking. When spring returns and the air becomes slightly more humid, the wood begins to swell again.
We often see gaps form around frames, or the sash may stick during warmer days. Those problems come from repeated expansion and shrinking cycles. Sometimes paint begins to crack, or caulking splits from the edges. That kind of movement stresses the structure. As a result, maintenance becomes more frequent.
In older homes with original wood windows, these changes usually start small. However, they grow worse after a few seasons. Our experience as a windows replacement company in Calgary shows that even high-quality wood frames eventually warp or shift if not sealed often. That work costs time and money every few years.
Vinyl Windows Stay More Stable in Low Humidity
Vinyl has different physical behavior. It’s a manufactured product, so it does not absorb or release moisture like wood. That means it stays closer to its original shape even when humidity changes. In our climate, that’s a major benefit. There is no shrinking in January and no swelling during the spring melt.
However, vinyl does react slightly to heat and cold. During very hot days, frames may expand slightly. But unlike wood, they return to their normal shape without warping. Because they flex evenly, the seals around the panes remain intact.
One reason homeowners often prefer vinyl is the reduced maintenance. There’s no need to scrape, sand, or repaint the surface. That makes them ideal for busy households and rental properties. We notice that vinyl frames installed properly can last decades without needing much attention.
Still, not all vinyl performs the same way. Better-quality materials include UV stabilizers and thicker chambers to reduce thermal transfer. These options help when comparing vinyl windows for Calgary homes, especially in sunny areas that face south or west.
Expansion Gaps and Movement Must Be Accounted For
When windows are installed, the opening in the wall must allow for a certain level of movement. Even the most stable frame material changes slightly in size depending on the temperature. For wood, that movement follows the moisture in the air. For vinyl, it follows direct sunlight and heat.
We make sure expansion gaps are left between the frame and the structure. Then, insulating foam fills the space. After that, trim hides the joint and keeps air and water out. This method prevents stress that could cause cracking or twisting later.
In Calgary, it’s important to avoid making the fit too tight. Otherwise, during cold months when the material contracts, the frame may pull away from the structure. In summer, it could expand and press against the opening, which can lead to distortion. These small adjustments in fit are a key reason new windows last longer.
Builders who rush the process or use standard templates often miss this detail. Over time, poor spacing shows up through drafts, hard-to-open sashes, or water leaks during storms.
Paint, Sealants, and Surface Coatings Behave Differently
The outside surface of a window is its first defense against dry winds, dust, and sunlight. Wood needs frequent coating to stay sealed. That means stain, paint, or oil depending on the finish. Alberta’s dry air speeds up the wear on those finishes. We see peeling and cracking more often, especially on upper floors where wind exposure is strongest.
Vinyl does not require coatings, but it still needs some protection. That’s why good quality frames come with built-in UV resistance. Over time, poor-quality vinyl may fade or chalk when exposed to direct sun. If that happens, replacing the surface isn’t possible. In contrast, wood can always be sanded and refinished if needed.
Proper care depends on the material. For wood, we recommend yearly inspections and touch-ups every few years. For vinyl, occasional cleaning with mild soap is enough. Avoid harsh cleaners or abrasives, especially if the surface has any color applied.
Because dry climates pull moisture from every exposed surface, even minor cracks in finish will lead to faster aging. Preventing that early saves repair costs later.
Drafts, Air Gaps, and Energy Loss Are More Noticeable
Alberta’s winter winds can make even a small draft feel like a major problem. Dry air moves fast through the smallest opening. Once seals around a window start to fail, the temperature indoors drops. In wood windows, these drafts often come from warping or gaps caused by shrinking.
We’ve found that sealing performance remains higher with modern vinyl designs. They use compression seals or multi-layer weatherstripping to block airflow. Because the frames stay more stable through the seasons, those seals stay tight longer.
It’s also worth noting that wood is less effective at resisting heat transfer unless combined with strong glazing and added insulation. Vinyl has built-in chambers that reduce heat loss, especially when paired with low-emissivity coatings on the glass.
Those small features make a big difference during wind chills. In our experience, one of the most common upgrades from older homes is switching out drafty wooden frames with efficient vinyl to reduce heating bills.
Moisture Trapping and Condensation Build-Up
Dry weather affects the inside of a home as well. When outdoor air is dry and heating systems run for hours, indoor humidity drops fast. As a result, condensation becomes less common in winter. But in spring, when snow begins melting and indoor air is more humid, we start seeing moisture inside glass units again.
With wooden frames, trapped moisture soaks into the material. That creates soft spots, mold, and eventually rot. Even with well-maintained sealants, once moisture enters, drying takes time and often doesn’t reach hidden areas. That’s why the damage keeps spreading.
Vinyl frames resist water. Even when condensation builds up, it usually runs off or evaporates without causing harm. That’s one reason more homeowners are asking for replacement estimates from a windows replacement company in Calgary. Long-term savings and fewer problems often make the decision easier.
We always recommend checking for signs like foggy glass, peeling paint, or water stains around the sill. These are early warnings that moisture is trapped inside the frame.
Material Longevity and Shrinking Risk
Wood can last a long time if kept dry and maintained regularly. That means sealing every crack, keeping up with paint, and avoiding prolonged exposure to water or heat. Still, wood shrinks over time. In dry climates, the process speeds up. Once the structure shifts, it becomes harder to fix.
Vinyl does not shrink, but lower-quality models may sag under their own weight or become brittle over time. That said, most modern designs now use reinforced cores or thicker frames to prevent these issues. So, the key is choosing a high-quality option.
When comparing lifespans, the difference often depends on upkeep. Wood may offer a classic look, but it needs constant attention. Vinyl works better for those who want reliability with less hands-on care.
FAQs
What signs show that a wood window is shrinking or warping?
Look for gaps between the frame and wall, sticking sashes, or cracks in the paint. These often appear after several dry seasons.
Do vinyl windows crack in cold Alberta winters?
Quality vinyl stays flexible even in freezing temperatures. Cheap models may become brittle, so it’s best to choose ones rated for cold climates.
Can I refinish or repaint vinyl windows?
It’s not recommended. Vinyl is not designed to hold paint, and most finishes will peel or fade. Always choose the final color when buying.
Why do some windows still get condensation in a dry climate?
It depends on indoor humidity and insulation. Poor ventilation or warm indoor air meeting cold glass can still cause condensation in spring.
How often should wood windows be resealed in Calgary?
We recommend inspecting every year and resealing at least every two to three years, depending on exposure and condition.