High-performance window solutions and building science expertise for energy-efficient, durable buildings.
Window supply backed by real building experience
Lifetime Windows combines high-performance window systems with over 15 years of hands-on construction and Passive House experience.
We don’t just supply products — we help you evaluate performance, durability, and long-term value so you can make confident decisions at every stage of your project.
Early Design & Concept Support
Window decisions made early in the design phase have one of the biggest impacts on both performance and budget.
Today, high-performance windows are often among the largest single investments in a building. Getting the specification right from the start can significantly affect energy use, comfort, and long-term costs.
We work with teams during the conceptual design stage to evaluate options early — helping guide window strategy, performance targets, and budget priorities before drawings are finalized.
This ensures smarter decisions, fewer changes later, and better return on investment.
What We Do
High-Performance Window Supply
Passive House–ready window systems designed for airtightness, thermal efficiency, and long-term durability.
Passive House & Energy Modeling
PHPP-based energy modeling and performance analysis for both new construction and retrofit projects, helping teams make smarter design and upgrade decisions.
Wall & Envelope Analysis
Window-to-wall detailing, moisture management, and assembly coordination to ensure long-term durability and performance.
Cost & Value Engineering
Balance upfront costs with lifecycle performance to maximize long-term return on investment.
Installer & Post-Installation Support
Clear guidance doesn’t stop at specification.
We support installers and contractors with practical detailing advice, installation best practices, and post-installation assistance to ensure window systems perform as intended.
From first install through long-term maintenance and repairs, we’re available to help resolve issues quickly and keep projects running smoothly.
Who We Work With
- Homeowners
- Architects and designers
- Contractors and builders
- Multi-unit residential developments
- Passive House and low-energy projects
Planning a high-performance project?
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