European Windows & Doors in Boulder, CO
Tilt-turn windows, folding glass walls and lift & slide doors — made to order in the EU to your exact openings and shipped to Boulder, Colorado. Installed by your contractor or an independent local installer.
What we ship to Boulder
Local code check
Window energy rules in Boulder, CO
- County
- Boulder
- IECC climate zone
- 5B
- Energy code for new homes
- 2024 City of Boulder Energy Conservation Code
- Max window U-factor allowed
- 0.27
New homes in Boulder need windows rated U-0.27 or lower. SwingTilt's triple-pane tilt-turn windows have a U-factor of 0.19 — 30% below that limit — and our double pane (0.27) meets it too.
Boulder mainly uses a whole-home energy-rating path; 0.27 is the window value in its prescriptive table. Colorado also requires windows sold in the state since 1/1/2026 to be U-0.30 or lower.
Checked October 2026. Codes change; confirm with your local building department before you build. Need window specs for your permit? Ask us before you order. Climate zone per IECC 2021 Table R301.1. Sources: bouldercolorado.gov, bouldercolorado.gov, codes.iccsafe.org
Built for your climate
Keep the heat in, keep the cold out in Boulder
In Boulder, Colorado, winters here punish weak windows. SwingTilt's multi-chamber frames and triple pane reach a U-factor of 0.19 — below the 0.22 that ENERGY STAR requires in its coldest zone — cutting drafts, cold spots and condensation while lowering heating bills.
- U-factor 0.19 with triple pane
- Triple pane eliminates cold spots and condensation
- Airtight multi-point seals stop every draft
Also serving near Boulder
Boulder window FAQ
- Do you install European windows in Boulder?
- We install ourselves in the Springfield, Missouri area. For Boulder, we make your windows and doors to order and ship them to you; your contractor or an independent local installer puts them in.
- How much do European windows cost in Boulder?
- Every window is made to your exact sizes, so price depends on size, glass and finish. Request a free quote and we'll price your project, including shipping to Boulder.
- How long do European windows take to get?
- Because each window is made to your exact opening in the EU, plan on about 12 weeks from approval to delivery — and you can track every stage online.
- What window U-factor does Boulder require?
- Under the 2024 City of Boulder Energy Conservation Code, new homes in Boulder (IECC climate zone 5B) need windows rated U-0.27 or lower. SwingTilt's triple-pane windows have a U-factor of 0.19.