Mon–Fri 8:30am – 4:30pm
Mon–Fri 8:30am – 4:30pm
Commercial Service
Commercial Window Air & Water Leak Repair
Water entering around commercial windows can damage interior finishes, insulation, and building materials. Our team investigates the source of the problem and recommends targeted repairs or replacement where required. Serving property managers, building owners, and facility teams across Hamilton and the Greater Hamilton Area.
60+ years in facilities management
Licensed & insured
A+ BBB rated
Failed Sealants & Gaskets
Perimeter sealants and glazing gaskets degrade over time, especially on sun-exposed facades. Replacement is often a straightforward fix if caught before water damage spreads to interior finishes and insulation.
Storefront & Curtain Wall Leakage
Commercial storefronts and curtain wall systems have unique leak paths that general contractors often miss. Our team is familiar with the specific detailing of common storefront and curtain wall systems and knows where to look.
Water Penetration
Leaks appearing around the window frame, often during driving rain. The source could be the window itself, a failed perimeter sealant, a gutter or flashing issue above, or a problem with the surrounding wall assembly. We trace the actual source before applying any fix.
Air Leakage
Drafts, cold spots, and uncomfortable rooms near windows. Air infiltration drives up heating and cooling costs, triggers tenant complaints, and often points to deteriorated gaskets, failed weatherstripping, or installation defects.
Common Problems We Address
What Causes Window Leaks and How We Fix Them
Window leaks almost always fall into one of four categories. The right fix depends on correctly diagnosing which one you're dealing with. Here's what we look for.
208 QUEEN ST N · HAMILTON
Repair or Replace
Choosing the Right Path Forward
Window repairs fall into three categories: routine maintenance, parts replacement, and structural repairs. New or well-maintained windows usually need simple fixes, while older, neglected windows may require structural work. If over 15–20% of your windows need extensive repairs, replacement may be more cost-effective.
Structural Repairs
For older or neglected buildings, we handle structural repairs — and if over 15–20% of the windows need extensive work, we'll be upfront that replacement is often the better call.
Parts Replacement
Choose from clear, frosted, tinted, or textured glass — each with a different look and feel for your space.
Routine Maintenance
Caulking, adjusting operators, and replacing damaged gaskets or glass. We identify the source of a leak before applying any sealant — otherwise you can make it worse.
Repair vs Replace
Which Path is Right for Your Building?
Most property managers we work with start with the same question — repair the leaks, or replace the windows? Here's how we help you decide.
When to Repair
If fewer than 15% of your windows show leak issues, and the underlying window units are still structurally sound, targeted repair is almost always the cost-effective path. We seal, replace parts, and monitor — and revisit annually as part of a maintenance program.
Best For
Newer buildings · Isolated issues · Recent installations
Applications
Caulking failures, worn weatherstripping, cracked gaskets, clogged weep holes, hardware replacement, targeted glass replacement.
When to Replace
When over 15–20% of the windows in a building have issues, or when the units themselves are past their service life, a phased replacement program is often more economical over 5–10 years than continued repair costs plus energy losses and tenant complaints.
Best For
Older buildings · Multi-unit issues · High energy costs
Applications
Full window unit replacement, storefront rebuild, curtain wall retrofit, phased replacement programs across a portfolio.
I had a number of windows replaced in my condo unit by City Window & Glass. The service team was quick to respond, knowledgeable, and offered useful tips for maintaining the windows. I found the level of detail and quality of product outstanding — I would highly recommend.
Lory Avery
Multi-Unit Window Replacement
Why City Window
60+ Years in Facilities Management
City Window & Glass has 60+ years of experience in facilities management. We are fully insured, a licensed contractor with the City of Hamilton (Lic. 12 115913 MA / 12 115456 CL), and proud to maintain an A+ rating with the Better Business Bureau.
1962
Year Founded
A+
BBB Rating
Same
Day Service
Free
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