At what point in a new home build should windows actually go in?

Windows go in after the framing and roof dry-in are complete but before stucco, siding, or exterior trim is applied, since the window's nailing fin has to be integrated with the weather-resistive barrier first. Installing too early risks damage from ongoing construction; installing too late complicates the exterior finish tie-in.

What should I ask a contractor before they install windows in my new Largo home?

Ask to see their Florida Product Approval documentation for the specific windows going into your project, and ask how they verify design pressure ratings for each opening rather than using one rating for the whole house. Also ask whether they coordinate directly with your builder's framing schedule, since new-construction installation timing matters more than it does for a simple replacement job.

Are all new-construction windows hurricane-rated, or do I need separate shutters too?

Not automatically — Florida code allows either impact-rated glass or standard glass paired with approved shutters or panels, and the choice is made per project. For new construction we typically recommend impact glass because it provides protection at all times without anyone having to deploy shutters before a storm.

What's the difference between a nailing-fin window and a block-frame window?

A nailing-fin (flange) window fastens directly to the wall sheathing and gets sealed to the house wrap, which is standard for wood-framed new construction. A block-frame window is designed to be set and anchored directly into a masonry or concrete block opening without a nailing fin, which is common in Florida's concrete block construction. The correct type depends on how your walls are built, not personal preference.

Does the City of Largo or Pinellas County require inspections specifically for new-construction windows?

Window installation is inspected as part of the overall building permit for your home or addition, not through a separate permit. The inspector typically checks the product approval labels, flashing details, and fastening before the wall is closed up with stucco or siding, so it's important that this work is ready and documented before that inspection is scheduled.

New-Construction Windows in Largo, FL: Built for Storm Country

New-Construction Windows: What the Term Actually Means

"New-construction windows" refers to units installed into a framed opening that has no existing window in it — a new home, a room addition, an enclosed lanai being converted to conditioned space, or a garage-to-living-space conversion in Largo. These windows have a nailing fin (also called a flange) around the perimeter that gets fastened directly to the wall sheathing and integrated with the house wrap or weather-resistive barrier before stucco, siding, or brick veneer goes on. That's different from a replacement window, which gets set into an existing frame in a home that's already finished inside and out.

The distinction matters because the sequencing, the flashing details, and the margin for error are all different. On a new-construction opening, the window installer is working alongside framers, stucco crews, and painters, and the window has to be sealed into the wall assembly correctly the first time — there's no siding to pull back and no interior finish to protect once drywall and trim are in. Get it wrong at this stage and the problem gets sealed inside the wall for years before it shows up as a stain or a soft spot.

Why Largo's Climate Raises the Bar

Largo sits in the middle of Pinellas County, close enough to Tampa Bay and the Gulf that homes here take on the same weather load as the rest of the Clearwater area, even without direct waterfront exposure. A few things stack up on new-construction openings specifically:

Wind pressure. Florida Building Code assigns a design wind speed and exposure category to every opening based on location, height, and surrounding terrain. Largo's wind speed requirements are set by the same coastal wind maps that cover greater Clearwater, and every window installed has to carry a documented rating to match.
Wind-driven rain. Afternoon storms here don't just fall straight down — sideways rain during a squall line or tropical system will find any gap in a nailing fin or sill pan that wasn't sealed correctly.
UV exposure. Year-round Florida sun degrades cheap vinyl, dries out low-grade sealants, and fades interior finishes faster than in most of the country. Frame material and glass coatings both need to account for it.
Salt air. Even a few miles inland from the Bay, airborne salt accelerates corrosion on fasteners, hinges, and lower-grade aluminum hardware over time.

None of these are unique to Largo, but a new-construction opening is where you get one real chance to build in the right defenses before the wall is closed up.

Code and Product Approval: The Non-Negotiables

Every window installed in new construction in Pinellas County has to have a current Florida Product Approval (or Miami-Dade Notice of Acceptance) number that matches the design pressure required for that specific opening. Design pressure depends on the wall's location on the house — corners and higher elevations generally see higher pressure than a sheltered wall — plus the home's height and exposure category. This isn't a one-size-fits-all number, and it's one of the most common places we see mismatches on homes where a builder ordered windows generically instead of opening-by-opening.

Impact-Rated Glass vs. Shutter Protection

Florida code gives builders two paths to satisfy windborne-debris protection: install impact-rated glass (laminated glass that stays intact when struck) or install separately rated shutters or panels on standard glass. For new construction, we generally steer homeowners toward impact glass. Shutters require someone to physically deploy them before every storm, they add a maintenance and storage burden, and a missed or improperly installed shutter panel defeats the protection entirely. Impact glass is simply always on. It costs more up front, but for a new build it's typically the more practical long-term choice.

Permitting

New-construction window installation is covered under the building permit for the structure itself, not a standalone window permit like a replacement job would need. Inspections typically check the window's product approval label, the flashing and sealant details, and confirmation that the installed unit matches what was submitted on the plans. If you're a homeowner working with a general contractor on a spec home or addition in Largo, it's worth confirming who is responsible for pulling those inspections and when they happen relative to when stucco or siding closes the wall.

What a Correct Installation Actually Involves

A new-construction window installation done right follows a specific sequence, and skipping steps is where leaks and rot start — often not showing up for a year or two.

Sill pan flashing. A sloped, sealed pan under the window opening directs any water that gets past the window back outside the wall assembly, rather than letting it sit on the wood sill.
Weather-resistive barrier integration. The house wrap or building paper has to be cut, lapped, and taped in the correct shingle-style order around the opening so water sheds outward at every layer, not into the wall.
Setting the window. The unit is shimmed square, plumb, and level in the opening — not just nailed in wherever it happens to sit — because a racked frame stresses the glass and hardware and can cause operable sashes to bind.
Fastening the nailing fin. Fasteners go in every location the manufacturer specifies, at the spacing their product approval requires. This is one of the most commonly shortcut steps on production builds — fewer fasteners is faster, but it's also what the wind rating was tested with.
Sealant compatibility. The sealant used has to be compatible with both the window frame material and the WRB. Mismatched sealants can fail to bond or actually degrade certain vinyl or membrane products over time.
Exterior finish tie-in. Stucco, siding, or trim has to terminate against the window with a proper reveal and sealant joint — not caulked tight against the frame in a way that traps water.

Choosing the Right Window for a Largo New Build

Factor	What to Consider in Largo
Frame material	Vinyl and fiberglass resist salt-air corrosion better than lower-grade aluminum hardware; fiberglass holds up best under sustained UV and heat cycling.
Glass package	Laminated impact glass with a Low-E coating addresses both windborne debris and Florida's cooling load in one product.
Design pressure rating	Must match the specific opening's exposure — corner and upper-floor openings usually need a higher-rated unit than sheltered ground-floor walls.
Operable style	Fixed and single-hung units generally seal tighter against wind-driven rain than sliders or casements with more moving hardware.
Warranty structure	Check whether the warranty covers the glass, the frame, and the hardware separately, and whether it's voided by improper installation — this is why installation quality and product quality matter equally.

Our Process on New-Construction Projects

On a new build or addition in the Clearwater and Largo area, we coordinate directly with the framing and stucco schedule rather than treating window installation as an isolated task. That typically looks like:

Confirming design pressure requirements opening-by-opening against the approved plans, not assuming one rating fits the whole house.
Verifying product approval documentation before any window is set, so there's no mismatch caught at inspection.
Installing sill pan flashing and integrating the WRB before the window ever goes into the opening.
Setting and fastening each unit to the manufacturer's tested specification, not a shortcut pattern.
Photo-documenting flashing and fastening before the wall closes up, since that work becomes invisible once stucco or siding goes on.
Being available for the inspector's walk-through and correcting anything flagged before it's covered.

Cost Factors for New-Construction Window Installation

Factor	Why It Moves the Price
Number and size of openings	More openings and larger units mean more material and labor hours.
Design pressure rating required	Higher-rated, higher-exposure openings use heavier-duty (and pricier) window assemblies.
Impact glass vs. shutter protection	Impact-rated laminated glass costs more per unit than standard glass paired with separate shutters.
Frame material	Fiberglass generally costs more than vinyl; both outperform low-grade aluminum in this climate.
Site access and build stage	Coordinating installation mid-framing on an active job site can affect scheduling and labor efficiency.

Broad ranges vary a lot by these factors, which is why we walk the plans or the site before quoting rather than pricing by square footage alone.

Why a Locally Experienced Crew Matters

New-construction window work in Pinellas County means dealing with the same building department, the same wind maps, and the same inspectors on nearly every job. A crew that already works in Largo and the broader Clearwater area knows what local inspectors check for, what documentation they expect on-site, and how the area's exposure categories typically shake out by neighborhood and elevation. That familiarity shows up as fewer failed inspections, fewer change orders mid-build, and a wall assembly that's sealed correctly the first time — which matters more here than almost anywhere, since a hidden flashing mistake behind stucco doesn't announce itself until there's already damage.

A Homeowner's Checklist for Overseeing New-Construction Window Installation

Confirm each window's product approval number matches the design pressure required for its specific location on the house.
Ask whether sill pan flashing is included at every opening, not just at ground level.
Verify the WRB (house wrap) is integrated with the window flange before stucco or siding is applied.
Ask for photos of flashing and fastening before the wall is closed up.
Confirm who is scheduling and attending the building department's window inspection.
Check whether the warranty is voided by improper installation, and who stands behind the labor if it is.

If you're building, adding on, or converting space in Largo or elsewhere around Clearwater, we're happy to walk your plans, talk through window selection, and give you a straightforward, no-pressure estimate — just fill out the form below to get started.