Corners on both frame and sash are fusion-welded into a single piece for rock-solid rigidity, preventing air gaps and keeping the structure square even after decades of freeze–thaw cycles.
Because every joint is heat-melted—not screwed together—the frame behaves as one continuous unit, so horizontal tracks stay perfectly aligned when a –25 °C morning flips to a +10 °C Chinook by lunch. That monolithic strength also shrugs off the racking forces created when both sashes slide to one end, meaning you’ll never battle sticky operation or hairline cracks that invite moisture. In short, less maintenance, lower energy loss, and a longer service life under Calgary’s famously fickle weather.
Premium “S”-Class SuperSpacer® plus a full 7/8″ Low-E argon IGU come standard; 1 ⅜″ triple glazing is optional for homeowners chasing top-tier ENERGY STAR® numbers.
The warm-edge spacer cuts edge-of-glass condensation—no more waking up to frosty tracks—while the Low-E layer reflects harsh UV that’s 10 % stronger at Calgary’s 1 045 m elevation. Dense argon gas slows conductive heat loss so effectively that your furnace cycles less on –30 °C nights, yet interior blinds stay cooler when July temps shoot past +30 °C. Opting for the triple-pane upgrade can drop U-values below 1.0 W/m²·K, putting Canada Greener Homes rebates and lower monthly utility bills well within reach.
One sash glides past the other on low-friction tracks for ventilation; both sashes pivot inward on an instant-locking shoe so you can clean exterior glass from indoors — no step-ladder required.
Heavy-duty nylon rollers ride a stainless sill rail, delivering finger-tip movement even after prairie dust storms. Crack the windward sash two inches and slide the leeward sash open for natural cross-flow that cools the room without firing up the A/C. When it’s time to wash, each sash unlatches and tilts in independently, keeping you safely inside on icy decks while still giving full access to the outer pane—ideal for second-storey bedrooms and condo balconies where ladders are off-limits.
A three-layer weather-strip system compresses tight when closed, stopping prairie dust, driving rain, and winter drafts dead in their tracks.
The inner bulb gasket cushions the sash against vibration and noise from Macleod Trail traffic, while the fin-seal middle layer filters out pollen that accompanies every Chinook. A rigid exterior gasket caps the defence, shedding melt-water so it never reaches the sill pocket. The faster the wind blows, the tighter the seals press—so your living room stays calm, quiet, and comfortable whether it’s a spring thunderstorm or a February white-out.
Deep, multi-chamber PVC extrusions trap insulating air pockets, boosting thermal resistance and overall frame strength without extra bulk.
Each chamber acts like a miniature thermal break, slowing heat transfer much the way a series of storm windows would—only built right into the vinyl. The added walls stiffen the long horizontal members typical of slider designs, preventing mid-span sag that can compromise the weather-seal. They also dampen low-frequency road noise, giving you a quieter space to work from home. The result: a slimmer-looking frame that still meets or exceeds ENERGY STAR® Zone 3 requirements and stands up to Calgary’s temperature whiplash.