Transform Your Windows—Without Replacing Them.
Discover IndowPRO: the high-performance secondary glazing system that helps you reduce energy costs, block outside noise, improve tenant comfort, and increase property ROI—faster and easier than you thought possible.
Every building has challenges. You've found your solution.
Is your building drafty, noisy, or expensive to heat and cool?
Over 40% of commercial buildings still rely on outdated single-pane or poorly performing windows. Full window replacement is costly and disruptive— and many stop searching for a solution when they get a budget-blowing estimate for window replacement.
INDOWPRO IS YOUR SMARTER PATH FORWARD
Our modular Secondary Glazing system installs in minutes on the inside of existing windows, and delivers industry-leading thermal and acoustic performance—with minimal disruption to tenants and operations.
Modular. Fast. Reliable.
IndowPRO frames ship disassembled, reducing shipping costs and job site logistics. Installers snap the frame together and mount it into your existing windows. Glazing is then added for installation times of 15 minutes per window.
From hospitals to historic hotels, IndowPRO adapts to your needs.
IndowPRO’s versatile, modular design, allows you to choose the glazing that matches your project priorities:
R-18 Vacuum Insulated Glass (VIG)
Best for: Maximum energy saving and excellent soundproofingLow-E pyrolytic glass
Best for: Budget-friendly energy upgradesAcoustic glass for noise reduction
Best for: Urban or hospitality noise issues (45+ STC)Lightweight acrylic options
Best for: Lightweight comfort & R-4 thermal insulation
Key Benefits
Cost-effective energy savings
Superb soundproofing (Blocks up to 20+ dBa of noise)
Creates virtually airtight seal—even in out-of-square openings
Built in desiccant
Improved building logistics mean less disruptive and expensive installations
Clean, low-profile design available in standard or custom colors
Real Transformations
Hear how building owners, facility managers, and installers are using IndowPRO to solve challenges and deliver results.
“Fixing our window problems allowed us to lease the space at market rates. The ROI was outstanding.”
— Mike Larkin, Broker & Property Manager
“The IndowPRO windows are silently amazing in our urban hotel windows.”
— Amber T., Hotel Manager
Join the IndowPRO Network
Are you a glazing professional looking for a system that installs easily, solves major client pain points, and opens up new revenue? IndowPRO provides the tools, training, and support to help you win new business for projects where replacement is too costly or disruptive..
Reliable, Non-disruptive Installations
452 windows, and 452 IndowPRO systems fit right the first time.
Project completed by 3 contractors + 2 temps in 8 business days.