All Weather Windows Terrain Series: Specs, Testing Data & Idaho Fit

Specifications & Testing Data

What the Terrain Series Actually Is

Terrain is the entry point to All Weather Windows' lineup, and the manufacturer says so plainly: fewest options, same Edmonton factory, affordable price. It is the tier All Weather sells to production builders across the Canadian prairies, which is worth a pause. A "builder-grade" window engineered for Edmonton and Saskatoon winters is built to a colder standard than the builder-grade vinyl most Treasure Valley subdivisions received in 2004. Above Terrain sit the Horizon Series (Alpine 6700, Ascent 6100) and the premium Apex Series.

Three current models:

Read the table this way: Terra 2700 is the new-construction slider, Terra 2750 is the same slider re-detailed for renovation work, and Terrano 2100 is the crank-out casement for anyone who wants a compression seal without a premium price. The stock-size limit on the 2700 comes from All Weather's 2019 catalogue; confirm current sizing with us, because it changes what the model can do in a replacement opening.

The Numbers That Matter

Glass sets the thermal result on any vinyl window, and Terrain draws from the same glass chart as Apex. All Weather's published centre-of-glass figures (imperial, Vision v4.0 simulations): dual-pane ComfortGain 180 with argon at COG U 0.26 and SHGC 0.69; dual-pane ComfortPlus 270 at U 0.25 and SHGC 0.37; triple-pane ComfortPlus 270 with two coatings at U 0.12 and SHGC 0.31. Whole-window NFRC ratings — the sticker a plan reviewer reads — run higher than these because they include frame and edge-of-glass. On a dual-pane Terra 2700 slider that gap can decide whether the unit meets Idaho's U ≤ 0.30 prescriptive requirement; on a triple-pane Terrano it is not a concern. We pull the NFRC number for every unit on the quote and print it there.

Air and water are rated under NAFS, with Performance Grades that scale with size; the residential class starts at PG15. The Terrano's interior glazing and triple weatherstrip are the same features All Weather uses on its premium casements. The Terra sliders rely on double-walled glazing stops and a drainage path the manufacturer redesigned for the 2750.

These are Canadian ENERGY STAR-certified windows under Canada's single national zone — roughly U ≤ 1.22 W/m²·K or an Energy Rating of 34 or better, a stricter bar than the US Northern zone's U ≤ 0.22. US certification depends on the exact glass package, so ask; we confirm it before the order goes north.

Terrain vs Apex vs Milgard Style Line and Trinsic

Our honest read: Terrain wins on winter performance per dollar and on the casement option at this price. Style Line wins for a buyer who wants a slimmer frame, an exterior colour, and a domestic lead time at about the same cost. Trinsic is a different conversation — a look-first window — and Apex is what you buy when you want All Weather's cold-climate engineering with colour and custom sizing included.

Where It Fits in Idaho — and Where It Doesn't

Fits. Production builders and investors in Nampa, Caldwell and Kuna who need nail-fin windows in quantity and want a spec sheet stronger than the usual builder vinyl. A Cascade or McCall cabin on a tight budget, where a triple-pane Terrano 2100 delivers most of what the mountain asks for. Any whole-house replacement where the owner wants white windows, a real winter number, and no interest in upgrades.

Doesn't. Anyone who wants an exterior colour — every Terrain frame is white. Homes with oversized picture openings that the 2700's stock sizes can't cover. HOA neighbourhoods requiring dark exterior frames. Historic North End work, where vinyl itself is the wrong answer. And any buyer for whom a US-made product and a shorter lead time outweigh the thermal edge — we'll say so and quote a Milgard instead.

Cross-border reality applies here too: Terrain ships from Edmonton, lead times shift with season and customs, and we give you the current one in writing at quote.

Warranty and Service, Locally

Under All Weather's Canadian residential consumer warranty, insulated glass seal failure and vinyl components have been covered for 20 years, coatings on vinyl for 10, workmanship for two, and spontaneous glass breakage for one — with transfer to a new owner on a single-family detached house. A new Maintenance & Warranty Guide took effect August 4, 2026, and we verify the terms that apply to your order before you sign. The part that matters most in year twelve: the phone call comes to Garden City, and the people who installed the window — Wood Windows Inc employees, 46 years running — are the ones who fix it.

Want a Terra or Terrano quoted against a Milgard Style Line for the same openings? Request a quote on this page or call (208) 376-2200.

Last reviewed 2026-09-10 by Wood Windows Inc — (208) 376-2200