When to replace commercial windows is a question that sounds simple and isn't. In a northern climate, the answer is usually "spring or fall, avoid winter." In Florida, the answer depends on hurricane season, insurance renewal dates, tax year timing, tenant occupancy patterns, product lead times, and AHJ permit cycles — and those factors don't always align. A facility manager who plans the install for the wrong window ends up fighting humidity that compromises sealant cure, storm risk that forces work stoppages, or a tenant calendar that triples the soft cost. This article breaks down the Florida-specific timing factors that northern advice doesn't cover, and what a realistic commercial replacement calendar actually looks like in 2026.
The Florida Calendar Shapes Everything
Florida commercial construction has a rhythm that the rest of the country doesn't share. Hurricane season runs June 1 to November 30. Insurance renewals often reset April 1 or July 1. The snowbird and tourist season runs November to April. Tax-year capital depreciation cycles close December 31. Each of these factors shifts when a commercial window replacement should happen, and for whom.
Here's how those factors line up across the calendar.
Best Time: Pre-Hurricane Season (March to May)
If the project needs to be wrapped up before hurricane season, plan to finish by June 1. That means back-timing from a mid-May install completion:
- Plan / spec / bid: November to January (4 to 6 months pre-install)
- Contract / submittals / permits: January to March
- Product manufacturing lead: January to April (8 to 10 weeks for pre-glazed ESWindows ES-8000 shipments)
- Install: March to May
- Punch / documentation / AHJ final inspection: May
Why this window works:
- Lower humidity during install (March to April averages 65 to 72 percent RH vs 78 to 85 percent in August)
- Lower rain frequency reduces schedule slippage
- Comfortable working temperatures for crews
- Impact-rated windows are in place before peak storm exposure
- Insurance verification letters delivered before July 1 renewal cycles
- Building is ready to stay operational through any storm event that summer
Good Time: Shoulder Seasons (October to January)
After hurricane season ends November 30, the fall and early winter offer another strong install window. Benefits:
- Mild temperatures and lower humidity (Florida winter averages 65 to 72 percent RH)
- Post-storm-season schedule frees up glazing sub availability
- Fiscal year-end tax planning for capital work (if completion by December 31)
- Resort and hospitality off-season starts October 1 in some markets — easier tenant coordination
- Product lead times remain manageable
Shoulder-season caveats:
- Holiday retail blackouts typically prevent retail installs from mid-November through early January
- December AHJ staffing thins out — permit review delays are common in the two weeks around Christmas and New Year
- Crew availability during holidays reduces — plan around it
Hard Time: Peak Summer (July to September)
Peak summer is the hardest install window in Florida, for multiple reasons:
Humidity Affects Glazing Seal Integrity
Field glazing in 85 percent ambient humidity traps moisture inside the glazing pocket at the moment of seal. That moisture works on the IGU perimeter seal from outside for years afterward. ACG's pre-glazed default avoids this because the IGU is already factory-sealed, but even pre-glazed installs benefit from lower-humidity field sealant application.
Sealant Cure Cycles Get Weird
Silicone and polyurethane perimeter sealants cure differently under high heat and humidity. Skin-over happens in minutes. Adhesion to substrate can be compromised if the substrate is above 130 F (which happens routinely on dark-finished aluminum in direct Florida sun in August).
Hurricane Risk During the Install
An active install with windows partially removed during an August storm is a bad scenario. Temporary closures won't meet HVHZ impact requirements. Schedule slippage for storm prep and recovery adds 1 to 2 weeks per named storm that enters the forecast cone.
Heat Stress on Crews
Florida heat index routinely exceeds 105 F from July through September. OSHA-compliant work limits production to 45 to 55 percent of normal rate after 11 a.m. Scaffolded high-elevation work becomes genuinely dangerous.
Insurance Renewal Timing
Florida commercial property insurance carriers apply impact-rated opening discounts of 15 to 35 percent on building coverage. Those discounts apply at policy renewal, which means the timing of install completion has insurance implications.
If policy renews April 1 — complete install by March 15 to capture the discount on that renewal cycle. If policy renews July 1 — target May 15 completion.
Budget Cycle Considerations
Calendar-Year Owners (December 31 Fiscal Year)
Tax planning can influence whether work is classified as repair (expensed immediately) or capital (depreciated over 39 years). Completing install and documentation before December 31 can shift the expense into the current tax year. Coordinate with the owner's CPA before committing to schedule — the wrong classification can be more expensive than the timing benefit.
Fiscal-Year Owners (June 30 or September 30)
Non-calendar fiscal years are common on healthcare, education, and some institutional owners. Their capital budget cycles typically lock 90 days before fiscal year start, which means scope decisions often happen in April (for July 1 FY starts) or July (for October 1 FY starts).
Tenant and Occupancy Timing
Schools and Universities
Summer breaks (June through early August) are the only acceptable window for K-12 and most university commercial glazing work. The schedule compression is brutal — 8 to 10 weeks to do what would normally take 14 to 18 weeks during the school year. Plan the submittals and permits to be fully approved before summer break starts.
Office Buildings
After-hours (6 p.m. to 6 a.m.) and weekend work reduce tenant disruption. Spring and fall tend to have lower tenant leave-taking and disruption tolerance than summer or deep winter holiday periods.
Hospitality
Florida resort and hospitality off-season is typically mid-April through mid-December, with variability by market. Eau Palm Beach Resort and similar high-end hospitality projects schedule major glazing work tightly into the April-to-October window.
Retail
January and February are the best retail install months — after holiday peak, before spring break. Avoid October 15 through January 10 on any street-facing retail scope.
A Recommended Planning Calendar
| Month | Action |
|---|---|
| October – December | Scope, bid, contract for spring install |
| January – February | Submittals, permits, product manufacturing start |
| March – May | Install window (target completion before June 1) |
| May | Punch, documentation, AHJ final, insurance letter |
| June – September | Minor maintenance only, avoid major field scope |
| October – November | Fall install window (secondary) |
| November | Start planning next year's spring install scope |
What Gets Overlooked
Two things that are frequently under-budgeted in commercial glazing schedule planning in Florida:
- AHJ permit review in HVHZ counties. Miami-Dade and Broward permit review on impact-rated commercial scopes is often 6 to 10 weeks. Start early.
- Product lead time for pre-glazed ESWindows units. Standard 8 to 10 weeks from approved submittal. Accelerate options exist but add cost.
Planning a commercial window install in West Palm Beach or elsewhere in Florida? Send scope and target completion via contact.html. We'll back-time the schedule and tell you whether the target is realistic.
Ready to get started?
ACG is a CGC-licensed Florida commercial glazing subcontractor (CGC1531993) with offices in West Palm Beach, Naples, and Tampa. We price commercial Division 08 scopes across the state and return competitive, itemized bids within 48 hours. Send your plans and we'll have a scope back to you fast.