Commercial Window Installation & Replacement

Old commercial windows leak air and water, fog up and drive up energy bills. We install and replace aluminum commercial windows with insulated low-E glass in offices, medical buildings, schools and mixed-use buildings.

Commercial window types

Commercial buildings use aluminum windows in individual punched openings, continuous ribbon windows across a facade, and window wall systems that span floor to floor. Windows can be fixed, or operable as casement, projected (awning or hopper), single-hung or horizontal sliding units. Most commercial windows are thermally broken aluminum with insulated glass.

Signs your windows need replacing

Fogged or streaked insulated glass in many units
Air leaks, drafts and whistling around the frames
Water leaks at sills and corners
Operable windows that no longer open, close or lock
Condensation and frost on frames in winter
High heating and cooling costs and uncomfortable perimeter offices

Replacement approaches

Windows can be replaced by removing the entire old frame and installing new windows in the rough opening, or by installing new frames over or inside the existing frames with trim to close the gaps. Full tear-out gives the best long-term result and lets us correct flashing problems, while retrofit methods reduce disruption and cost. We evaluate the existing conditions and recommend the right method.

Occupied buildings

Most commercial window replacements happen while the building is occupied. We sequence the work floor by floor or elevation by elevation, protect interiors, and close each opening the same day so tenants can keep working.