Commercial Storefront Glass Repair: When to Call a Glazier and What to Expect
What commercial storefront glass repair actually involves
Commercial storefront glass repair is the diagnosis and correction of damage, deterioration, or failure in the glazing system that forms your building's facade. This includes replacing broken or cracked glass panes, resealing compromised structural silicone joints, replacing failed gaskets or pressure plates, and correcting water infiltration where the frame system meets the glass. It is structural work that directly affects weathertightness, security, and tenant comfort.
The storefront glazing system consists of aluminum extrusions (mullions and transoms), insulated glass units (IGUs), structural silicone or glazing sealant, thermal breaks, gaskets, and fastening hardware. When any of these fail, water and air get in, or the glass loses its structural support. A qualified glazier diagnoses which component has failed and replaces only what needs replacing, preserving the integrity of the rest of the system.
When to call a glazier for storefront glass damage
Call a glazier immediately if you observe visible cracks or breaks in glass panes, water pooling on interior sills or running down walls behind the glass, visible daylight around the frame perimeter on a clear day, or gaps where the frame has separated from the masonry or structure. You should also call if you notice condensation trapped between panes of an IGU, or if the glass has begun to bow or shift within the frame. These represent active failure.
Beyond emergency damage, you should have a glazier assess the system if you see any of the following during routine property inspections: silicone that has hardened, cracked, or pulled away from the glass or frame, discoloration or staining on the interior of the glass that won't wipe off, visible corrosion on aluminum framing, difficulty opening or closing any operable sashes, or gaps in caulk joints where moisture could enter.
Signs that require immediate professional attention
These conditions warrant a call the same day:
- Broken, cracked, or splintered glass (safety hazard, security breach)
- Active water entry during rain (structural and mold risk)
- Partial separation of the glass from the frame (immediate collapse risk)
- Structural silicone that has failed completely or pulled away over a seam longer than 6 inches
- Damage to mullions, transoms, or aluminum framing that no longer supports the glass
- Any glass damage in a fire-rated storefront assembly (code compliance required)
Element13 responds to emergency calls same day or next morning, depending on severity and time reported. We maintain in-house fabrication capacity, so we often can source and install replacement glass without the multi-week lead times typical of off-site repairs.
How Element13 approaches storefront glass repair
Element13 is a commercial-only glazier, signatory to the Glaziers Union Denver, with NACC Master-Certified glaziers on staff. Every repair we perform meets commercial standards, code specifications, and structural requirements.
Our process begins with a site assessment by one of our master-certified glaziers. We diagnose the root cause of the failure, not just the symptom. If it's a cracked pane, we determine whether thermal stress, structural load, or impact caused it. If it's water intrusion, we use in-house air and water testing (ASTM E283 for air infiltration, ASTM E331 for water resistance) to locate the exact failure point. This prevents the same problem from recurring after repair.
We maintain in-house fabrication and assembly capacity, which means we control material quality and dimensional accuracy from the start. We do not rely on third-party shops. This reduces lead times and allows us to start work sooner, minimizing your operational downtime.
All repairs are performed by union-trained craftspeople who understand structural silicone application, insulated glass unit composition, and the thermal and structural performance requirements of IBC Chapter 24. We carry the appropriate insurance and bonding for commercial work.
The repair process: what happens from call to completion
Once a glazier has assessed the damage and confirmed the scope, we provide a written scope of work and timeline. For a single pane replacement in an existing storefront frame, the repair typically takes 1 to 2 business days, depending on whether the glass is in stock or must be fabricated.
The actual repair sequence depends on the failure mode. If the glass itself is damaged but the frame and silicone are intact, we remove the pressure plates or gaskets holding the glass, lift out the broken pane, set the replacement glass, reapply the gasket or pressure plate, and re-seal if necessary. This can often be completed in a few hours.
If the structural silicone has failed, the repair is more involved. We must remove the glass (or carefully work around it), cut out the failed sealant, prepare the surface per ASTM C1548 guidelines, apply new structural silicone, and allow proper cure time before the storefront returns to full service. Cure time is typically 7 days for full strength, though the storefront can be occupied after 24 to 48 hours with restricted access if necessary.
If the IGU itself has failed (condensation between panes, broken seal), we replace the entire unit. We remove the old IGU, clean the frame, install the new IGU to spec, re-gasket, and re-seal the perimeter.
During any repair, we phase work around occupied tenancy whenever possible. We can start early mornings or during off-peak business hours. We use temporary protection (cardboard, plywood, or plastic sheeting) to secure the opening if the glass must remain out overnight.
Code compliance and permitting for glass replacement in Colorado
Commercial glass replacement in Colorado falls under the International Building Code Chapter 24 (Glass and Glazing). The glazing system must meet specific performance standards depending on the building use, occupancy load, and hazard category.
Key code drivers include the type of glass used (tempered, laminated, or fire-rated depending on location within the building and proximity to egress routes), the impact rating (ASTM C1048 for tempered glass, ASTM C1172 for laminated safety glass), and thermal performance requirements under ASHRAE 90.1 and the IECC energy code.
If you are replacing glass in a fire-rated storefront assembly, the replacement must be fire-rated glazing rated to ASTM E119 and installed per the original design specifications. Fire-rated glass cannot be substituted with standard annealed or tempered glass.
Permitting requirements vary by municipality. Denver and most surrounding jurisdictions require a permit for commercial glass replacement. Element13 handles the permitting process as part of the repair scope. We know the local requirements in Denver, Aurora, Boulder, Arvada, Lakewood, Thornton, and other service areas across the Front Range. We have DBE, EBE, and WMBE certifications recognized by the City and County of Denver and other local authorities, which streamlines approval.
How to tell if you need repair versus full replacement
A single cracked pane can be replaced in place. Localized silicone failure can be re-sealed. The decision to repair or replace depends on the age of the system, the extent of the damage, and whether the underlying frame is still structurally sound.
Replace the entire storefront system if: the aluminum framing is corroded, broken, or no longer supports the glass; the IGUs are beyond individual replacement because multiple units have failed or the frame is no longer true; the building has settled or shifted, causing the frame to bow or misalign; the system no longer meets current thermal or structural code requirements; or water intrusion is pervasive and not isolated to one joint.
Repair localized damage if: the frame is structurally sound and true; only one or two panes are broken; silicone failure is isolated to a few joints; the IGUs are relatively new and only one or two have failed; and the building has not shifted or changed since the system was installed.
A qualified curtain wall installation or commercial glazing installation project may make financial sense if the system is older than 20 years, has a history of recurring leaks, or no longer meets energy code. A new system offers a full warranty and guaranteed performance. Element13 can perform design-assist and value engineering to help you weigh the decision.
What to expect in terms of timeline and operational impact
For a simple glass pane replacement in an existing frame, expect 1 to 2 days of work. If the glass is in stock, the repair can start the next business day. Lead time depends on whether the pane is a standard size or custom-fabricated. Custom insulated glass units typically require 5 to 7 business days to fabricate, so the total repair timeline is 1 to 2 weeks.
For structural silicone re-sealing, plan 2 to 5 business days, plus 7 days for full cure if the storefront must be sealed against weather during that time. We can often work around occupancy by scheduling early mornings or nights.
For a full storefront glass installation or replacement, the timeline is 3 to 6 weeks depending on the scope of fabrication, frame prep, and whether the building is occupied during the work.
We coordinate with your facility team or general contractor to identify work windows that minimize operational disruption. We can provide temporary weather protection, set up barriers, and coordinate staging to keep hallways and tenant access open during repair.
Structural silicone and sealant degradation: what to look for
Structural silicone is the primary element holding glass panes into the aluminum frame and sealing them against weather. It is a load-bearing adhesive designed to ASTM C920 (for sealants) and ASTM C1184 (for structural glazing). It must remain flexible, adhere completely to both the glass and the frame, and resist UV degradation, thermal cycling, and moisture.
Degradation typically shows as:
- Hardening or brittleness: silicone should feel slightly tacky and give slightly when pressed. If it feels rock-hard or chalky, it has oxidized and lost adhesion.
- Cracking or crazing: fine cracks running through the sealant joint indicate thermal stress or improper installation.
- Separation: gaps between the sealant and the glass or frame edge allow water to wick behind the seal.
- Discoloration: yellowing or browning from UV exposure, black mold growth, or staining indicates the sealant is no longer protecting the substrate.
- Pulling or sagging: if the silicone has lost adhesion, it may sag under the weight of the glass or pull away from one edge.
When any of these appear, the silicone is failing. Element13 will remove the failed sealant, inspect the frame and glass for damage, and apply new structural silicone per the original specification. We use high-quality, UV-resistant silicone rated for structural applications. We apply it to thickness and width per ASTM C1184 and allow proper cure time before the storefront returns to service.
Frequently Asked Questions
We respond same day or first thing the next morning depending on the time reported and severity. We maintain in-house fabrication and parts inventory, so we often can start repair work immediately rather than waiting for materials. Call us with photos or a video of the damage, and we will provide an assessment and timeline on the phone.
Yes. Commercial glass replacement requires a permit in Denver, Boulder, Aurora, and all other Front Range municipalities. The permit ensures the replacement glass meets code for impact rating, thermal performance, and fire rating if required. Element13 handles the permit as part of the repair scope. We know the requirements in every jurisdiction we serve.
If the frame is straight and sound, and only the glass or localized sealant has failed, repair is the right choice. If the frame is bent, corroded, or no longer supports the glass without bowing, or if water intrusion is widespread and recurring, replacement is more cost-effective long-term. We assess the system on site and provide a clear recommendation. If replacement makes sense, we can design and install a new commercial glazing system that meets current code and performance standards.
Yes, if the system is documented and the specifications are available. We will match the glass type (tempered, laminated, low-E, etc.), the glazing system (gasket, pressure plate, or structural silicone), and the frame finish. If drawings or spec sheets are not available, we can determine the system by on-site inspection. Some older systems may not be reproduced exactly, but we will install a functionally equivalent replacement that meets current code.
Structural silicone requires a minimum of 7 days to reach full structural strength at 70 degrees Fahrenheit and 50 percent relative humidity. Temperature and humidity affect cure time. Cold or damp conditions extend it. We plan the schedule around cure time and will restrict access to the repaired section if necessary during the cure window. The storefront can be occupied after 24 to 48 hours with basic use, but full exposure to wind load and thermal stress should be avoided until the full 7-day cure is complete.
We warranty our labor and materials. The glass itself carries the manufacturer's warranty, typically 10 years against seal failure on insulated glass units. Structural silicone is warranted for 20 years against adhesion failure and UV degradation under normal conditions. We provide a written warranty document with every repair and stand behind our work.
Yes. We schedule work early mornings, nights, or off-peak hours to minimize disruption. We use temporary barriers, plastic sheeting, or removable plywood to secure the opening during work and cure time. We coordinate with your facility or building management to identify suitable work windows. For most repairs, occupation can continue without restriction after 48 hours.
Cost depends on the scope: whether you are replacing one pane or multiple units, the size and type of glass, whether the frame requires repair or modification, and whether new structural silicone is needed. A single pane replacement in an existing frame typically runs less than a full system replacement. We provide a written quote after the site assessment. There are no surprises. We communicate any change in scope or cost before we proceed.
When Glass Door Problems Can't Wait Contact Element13
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