Curtain Wall Replacement Is a Specialty Discipline
Curtain wall is fundamentally different from residential windows or even commercial storefront work. The system spans multiple stories, doesn't carry vertical load, is engineered to handle wind pressure across a full elevation, and integrates with the building's fire-stop, vapor barrier, and structural connections. A contractor without curtain wall experience doing curtain wall work creates problems that surface 1–5 years later — water tracking behind interior finishes, framing corrosion from condensation, premature sealant failure from wrong-spec product.
Across New Jersey we work on mid-rise office buildings in Hackensack, Newark, Jersey City, Hoboken, and the state's commercial corridors. Multi-family residential — Class A apartments in Hudson and Bergen County, condo conversions, hospitality. Institutional properties — medical office buildings, university buildings, government facilities. Each has different constraints: occupied vs unoccupied, secure access requirements, life-safety considerations, schedule pressure.
Most NJ curtain wall replacement work falls into one of three buckets: (1) full re-glazing of buildings built 1970–1995 where the original system has reached end-of-service-life on all major components, (2) selective re-glaze and sealant renewal on buildings built 1995–2010 where 20–40% of panels are failing but the framing system is still sound, (3) hurricane or storm-damage replacement at coastal NJ properties where insurance is funding upgrade to current impact code. We've done all three.
Curtain Wall Systems We Work With
Six core system types covering virtually all NJ commercial glazing applications. We are not single-manufacturer locked — we match the right system to the building.
Stick-built curtain wall
Aluminum vertical mullions and horizontal rails field-assembled at the building, with glass and panels glazed in place. Most common system on mid-rise NJ commercial buildings from the 1970s onward. Replaceable as a system or floor-by-floor — we have crews experienced with stick-built re-glaze on occupied buildings.
Unitized curtain wall
Prefabricated panels (one or two stories tall) shop-glazed and trucked to site, hung on the structure as complete units. Faster install, tighter quality control, common on newer high-rise construction. Replacement is by full-unit swap — more complex coordination but less field-glazing risk.
Window wall systems
Floor-to-slab glazing with exposed slab edges between floors. Lower cost than full curtain wall, common on multi-family residential mid-rises, hotels, and budget office construction. We replace damaged sections or full elevations as scope requires.
Structural silicone glazing (SSG)
Curtain wall systems where the glass is bonded to the framing with structural silicone (no exterior pressure plate or cap). Clean visual appearance, more demanding install and replacement spec — sealant bites must be exact, cure times respected. We're trained on SSG systems and carry the right testing equipment.
Hurricane-resistant curtain wall
Impact-tested per ASTM E1886 / E1996 for wind-borne debris protection. Large-missile rated systems for installations up to 30 ft above grade, small-missile rated above 30 ft. Relevant for NJ coastal commercial properties (Cape May County, Atlantic County, Ocean County) where local codes specify impact-resistant glazing.
Curtain wall repair & re-glaze
Sometimes full replacement isn't the right answer. We do sealant renewal across all joints, individual IGU swaps for failed panels, pressure-plate gasket replacement, and selective re-glazing of damaged or aesthetic-update panels. Extends the life of a sound system by 10–15 years.
Common Curtain Wall Failure Modes
Six failure patterns that drive 95% of NJ curtain wall replacement and re-glazing work.
Perimeter sealant failure
Most common curtain wall failure mode on NJ buildings. Sealant at the slab edge, head, and sill joints reaches end-of-life around 15–20 years, faster on south- and west-facing elevations. Symptoms: visible cracking, water infiltration at floor lines, condensation behind the glazing.
IGU seal failure
Insulated glass units (IGUs) lose their argon-gas seal as the dual-pane gasket breaks down. Visible as foggy or hazy panels that don't clear with temperature change. Once 20–30% of panels are failing, system-wide re-glaze becomes more economical than one-by-one replacement.
Thermal break failure
Older aluminum systems used a thermal break (insulating barrier in the framing) that can degrade or be missing entirely on pre-1980s buildings. Result: condensation on interior framing during cold weather, energy loss, frame deterioration over time.
Gasket / pressure plate failure
EPDM and silicone gaskets that hold glass into framing harden, shrink, and crack with age. Pressure plates and snap-on caps loosen, fall out, or corrode at fasteners. Often repairable without full re-glaze — gasket replacement and pressure plate re-bedding.
Water infiltration & weep system blockage
Curtain wall systems have engineered weep paths to drain water that gets past the exterior gasket. Sealant repairs over weep holes, debris clogging, or improper original detailing causes water to back up and leak interior. Diagnosis requires understanding the original drainage spec.
Hurricane / impact damage
Flying debris during severe weather can shatter individual panels, dent framing, or warp anchor connections. Often paired with insurance claims. Coastal NJ properties increasingly need impact-resistant upgrades during repair to meet current code.
Our Replacement & Re-Glaze Process
Building condition assessment
Walk every elevation of the building, document existing system manufacturer and series, identify failure modes, measure representative panels and joints, and pull a few core samples (sealant, gasket) for analysis if needed. Final report with photos, failure inventory, and prioritized scope.
Repair-vs-replacement recommendation
Based on the assessment, we recommend the right strategy: localized repair (under 15% failure), system-wide sealant renewal and selective re-glaze (15–30% failure), or full re-glazing replacement (30%+ failure). You get the math, the timeline, and the long-term cost-of-ownership comparison.
Engineering & submittal review
For full replacement or significant re-glazing, the new system needs structural calculations, energy code compliance documentation, and submittal review (especially if going to a different manufacturer). We coordinate with structural engineer and the manufacturer's technical rep on submittals.
Tenant coordination & staging plan
Detailed floor-by-floor or bay-by-bay schedule, tenant notification 2–4 weeks ahead of each area, interior protection plan, swing-stage or boom-lift staging, and after-hours work scheduling if required for sensitive tenants (law firms, medical, financial services).
Install & water testing
Manufacturer-spec install, AAMA 501.2 water-spray testing on representative bays, photo-documentation of every panel install. Independent third-party testing available for higher-spec projects or owner-required QA.
Alternatives to Full Replacement
Full curtain wall replacement is a 6–9 month, multi-million dollar project. It's not always the right answer. Three intermediate strategies often extend service life and defer capital expense:
System-wide sealant renewal
Cut out and replace all perimeter, head, sill, and mullion sealant joints. Often eliminates water infiltration for 10–15 years without touching glass or framing.
Selective IGU re-glazing
Replace only the panels with failed seals, keeping sound panels in service. Cost-effective when 20–30% of panels are failing — extends the building's glazing life by 5–10 years.
Gasket and pressure plate renewal
Replace deteriorated EPDM and silicone gaskets, re-bed pressure plates and snap caps, replace corroded fasteners. Often a 3–6 month project on a mid-rise — defers full replacement.
Related Services
Commercial Window Installation →
Storefront, office, retail glass installation and replacement.
Hurricane Impact Windows →
Impact-rated glazing for coastal NJ commercial.
24/7 Emergency Board-Up →
Storefront and commercial glass emergencies.
Commercial Roof Repair →
TPO, EPDM, PVC, modified bitumen, BUR repair.
Curtain Wall Replacement — FAQ
When does a commercial building need curtain wall replacement vs. just glazing repair?
Three diagnostic signs push toward full replacement: (1) sealant failure across the majority of joints (perimeter, head, sill, vertical mullions) — once sealant is at end-of-life, individual repairs just chase the failure around the building; (2) thermal break failure in older aluminum systems causing condensation and energy loss the building can't insulate around; (3) widespread IGU seal failures (more than 25–30% of the glazing panels showing fog or visible degradation). Single-panel glass replacement, isolated sealant repair, and pressure-plate gasket replacement are all valid for limited failures. We do the assessment and give you the honest call.
What's the difference between curtain wall, window wall, and storefront?
Curtain wall spans floor to floor and hangs off the building structure — it doesn't carry vertical load, just wind and weather. Common on mid-rise and high-rise commercial buildings. Window wall sits floor-to-floor between concrete slabs (the slab is exposed) — easier to install, cheaper, common on multi-family and lower-end office. Storefront is for the first floor or two — heavier framing for retail/restaurant glazing with entry doors integrated. Each has its own framing systems, sealant details, and replacement methodologies. We work on all three.
Can you replace a curtain wall floor-by-floor while tenants are still in the building?
Yes — this is how 90% of mid-rise curtain wall replacements get done. Tenants stay in place, work proceeds floor-by-floor (sometimes bay-by-bay within a floor), and temporary interior weather barriers are installed each evening so workspaces stay sealed. The schedule and tenant coordination is more involved than the actual glazing work — that's where having the right project manager matters. We've staged this kind of work in occupied office buildings, multi-family, and medical facilities.
Which manufacturer systems do you work with?
Kawneer (1600, 1600 Wall, 1600UT, Trifab series), Vistawall (Quantum 7000, AT Series), EFCO (S5500 series, D300 series), YKK AP (YHC 300 OG, YCW 750 IG, YES 45), US Aluminum (Series 360, 250), Tubelite (T14000), and various stick-built and unitized custom assemblies. For replacement work we either match the existing framing system (cleaner integration if the system is still in production) or recommend a contemporary system that's better-performing if the original is obsolete. We are not single-manufacturer locked.
What's the typical timeline for a commercial curtain wall replacement project?
For a typical 4-story, 30,000 sq ft glazed area replacement: assessment and scope (2–4 weeks), engineering and submittal review (4–8 weeks), framing and glass procurement (8–16 weeks depending on system), actual install (6–12 weeks floor-by-floor). Full project from first walk to last panel is typically 6–9 months, with the install window concentrated in roughly 8–14 weeks of crew time. Faster on smaller buildings; longer on highly customized systems or fire-rated assemblies.
How do you handle water testing after curtain wall installation?
Water-spray testing per AAMA 501.2 is the standard for confirming a curtain wall installation is watertight. We perform field water testing on representative areas (typically 1–2 panels per elevation) after install — calibrated nozzle, specific spray pattern, observed from interior for any infiltration. For large new construction or full re-glaze projects an independent third-party testing firm can be engaged. Test results documented in writing for the building owner's file.
What about thermal performance — can a new curtain wall actually improve energy costs?
Significantly. A 1970s-1990s aluminum curtain wall with single-pane or first-generation insulated glass typically performs at U-factor 0.60–0.80. A modern thermally-broken aluminum system with high-performance IGU (argon-filled, low-E coated, possibly triple-pane) can hit U-factor 0.20–0.30 — roughly 3x better insulation. On a large building this translates to meaningful HVAC savings, but more importantly eliminates the persistent condensation, drafts, and tenant comfort complaints that drive lease turnover.
Do you provide Certificate of Insurance, bonding, and additional insured certifications?
Yes. General liability and workers' compensation coverage, COI issued with your building, property management, REIT, lender, or any required additional insureds before mobilization. For projects over a certain threshold we provide payment and performance bonding through our insurance partner. Our COI and bonding paperwork is delivered as part of project setup, typically within 2–3 business days of project award.
Got a Glazing Project? Let's Walk the Building.
Capital expense planning, water intrusion problem, storm-damage replacement, or new construction glazing scope — we'll do the assessment and write a real scope without the high-pressure sales theater.