Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Fast, Reliable Impact Windows & Doors Across Key Biscayne
We pulled a set of original 1960s jalousie windows from a Key Biscayne house near Sunrise Drive last year, and the aluminum frames crumbled in our hands. The jambs were so pitted by salt air that the screws had seized solid and snapped on removal. That’s what living on a barrier island does to windows and doors. Key Biscayne sits with the open Atlantic on one side and Biscayne Bay on the other, so every opening in your home takes salt spray from one direction or another, every single day, all year long. Our Impact Windows & Doors crews serve Key Biscayne directly from our Miami office, and we spec every job for this island’s specific combination of marine corrosion and Miami-Dade High Velocity Hurricane Zone code. Call (813) 320-9346 and we’ll walk your property with you, free of charge.
Why We Spec Key Biscayne Windows Differently Than Mainland Miami Windows
Key Biscayne is a true barrier island. There is no landmass buffer between you and the Atlantic. When a hurricane or a tropical squall pushes in from the east, Key Biscayne takes the first hit, and storm gusts here routinely run higher than what downtown Miami or Coral Gables record in the same system. Add the year-round salt-laden humidity off Biscayne Bay, and you have the most corrosive environment for window and door hardware in the entire Miami metro.
That changes what we specify. On a house in Coral Gables, a standard aluminum impact window with zinc-coated hardware will hold up for years. On Key Biscayne, that same setup starts showing white chalking and pitting on the aluminum within months, especially on east-facing elevations. The hardware seizes. The weatherstripping degrades. The seal fails. Then the homeowner pays for the window twice: once for the cheap spec, and again for the replacement when it fails early.
So on Key Biscayne jobs, we specify marine-grade frames, stainless steel hinges and screws, and full flashing tape at every opening. It costs more up front. It costs less within a decade. That is the price gap between the coastal-spec window and the inland-spec window, and we put it on paper so you can see it side by side before you sign anything.
Why TruePane Windows & Doors Is Key Biscayne’s Choice for Impact Windows & Doors
TruePane Windows & Doors was founded by second-generation glazier Dale Kessler in 2008, built on a principle that out-of-true installs and voided warranties were problems worth fixing permanently. Dale keeps one rule on the whiteboard: if the pane is not true, the job is not done. That rule drives how we work on Key Biscayne, from the first measurement to the final flashing detail.
We are an authorized installer for more than a dozen manufacturer lines, including Andersen, Pella, Marvin, Milgard, PGT, and CGI. That means we can quote you multiple products side by side on paper, with both manufacturer warranty layers registered in writing before the truck leaves your driveway. We call it The Keystone Standard. Every job also carries our 90-Day Done Right Promise: if it is not done right, we make it right. No paperwork fights, no arguing.
A live person answers our phone 24 hours a day, 7 days a week. Not a voicemail tree, not a call center. When you call about a window or door on Key Biscayne, you talk to someone who knows the island’s building stock and the code issues that come with it.
Homeowners on Key Biscayne have had enough of contractors who measure once, install crooked, and disappear when the warranty paperwork matters. We hire local, background-check every technician, and train apprentices into journeymen. We plan to be answering the phone in this community thirty years from now. That is how a company acts when it intends to stay.
Our Impact Windows & Doors Services in Key Biscayne
Hurricane Impact Windows
Key Biscayne sits inside Miami-Dade County’s High Velocity Hurricane Zone, which mandates the strictest product-approval standard in the nation: Miami-Dade Notice of Acceptance, or NOA. We install NOA-rated impact windows from Andersen, and other approved lines, sized for the large openings common in both the island’s 1960s ranch homes and the luxury high-rise condos along the oceanfront and bay-front. Every opening gets measured twice, and every frame gets stainless hardware because standard zinc does not survive the salt load here.

Impact Sliding Glass Doors
The older single-family homes on Key Biscayne, particularly the concrete-block ranch houses built in the 1960s and 1970s, frequently have original single-pane aluminum sliders. Those sliders leak air, bind in the humidity, and offer no impact protection. We replace them with NOA-rated impact sliders with stainless rollers and marine-grade tracks. In the high-rise condominiums, we handle large glass curtain-wall slider sections that require crane coordination and building-association approval, both of which we manage directly.

Impact Entry & French Doors
Salt air attacks door hardware faster than any other component on Key Biscayne. Standard zinc-coated hinges and screws corrode within a few seasons, leaving entry doors that will not lock or seal properly. We install impact-rated entry and French doors with stainless hinges, multi-point locking systems, and marine-grade thresholds. The doors are rated for HVHZ wind loads and tested against flying debris, which is not optional here.

Impact Garage Doors
Garage doors on Key Biscayne take the full force of the onshore breeze and the salt it carries. We install and service impact-rated garage doors with rust-resistant hardware and reinforced tracks. Many of the island’s older homes have original doors that would buckle in a Category 2 storm; we assess them honestly and replace them only when they truly need it.

What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Salt Air Decides the Materials on Key Biscayne, Not the Schedule
Here is the core of what we see on this island. Aluminum frames on non-marine-rated windows develop white chalking and pitting within months, especially on east-facing elevations that take direct Atlantic salt spray from the constant onshore breeze. Hardware on impact sliders and French doors seizes after a few seasons because standard zinc-coated screws and hinges corrode in the salt-laden humidity, leaving sashes that will not lock or seal. Single-pane original jalousie windows cannot be grandfathered during a permitted renovation under current Miami-Dade HVHZ rules, so they trigger forced replacement at point of sale: a failure of code compliance, not just performance.
We specify materials that survive this environment. Stainless steel fasteners instead of zinc-coated. Marine-grade aluminum frames with factory-applied finishes instead of standard mill finish. Full flashing tape at every opening so water that gets past the exterior never reaches the framing. Hot-dip galvanized hardware on anything that faces the ocean. Sealed joints, not just caulk beads.
The cheaper spec would pass a visual inspection on day one. Within a decade on Key Biscayne, the homeowner is paying for it twice. That is the math we explain to every customer before they choose a product line.
Key Biscayne’s Real Estate and Insurance Reality
Key Biscayne homes attempting a sale or insurance renewal get flagged for original jalousie and single-pane slider windows on a regular basis. Neither can be grandfathered under current Miami-Dade HVHZ rules during a permitted renovation, so window-and-door contractors on this island do a significant volume of compliance-driven replacements tied directly to real estate transactions, not just storm damage or aesthetic upgrades. If you are selling, a buyer’s inspector will flag those windows. If you are renewing insurance, the carrier may require documentation of impact protection. We provide written documentation of NOA compliance on every installation, because we know Key Biscayne homeowners need it for exactly these reasons.
Trusted Brands We Service in Key Biscayne
We are an authorized installer for more than a dozen manufacturer lines, and we quote them side by side on paper so you see exactly what you are buying. On Key Biscayne, we commonly specify ViewLux fusion-welded impact casements for single-family homes, ES Windows for high-rise condo projects where the association requires a specific aesthetic, and Andersen for homeowners who want a full-service window company backed by a national warranty. We stock marine-grade stainless hardware locally for Key Biscayne customers, which shortens turnaround time on replacements and service calls. Both warranty layers get registered in writing, with durations stated, before the truck leaves your driveway.
Common Impact Windows & Doors Problems We See in Key Biscayne Homes
- Salt-pitted aluminum frames on east-facing elevations. Original 1960s and 1970s window frames in Key Biscayne’s single-family ranch homes were never built for direct Atlantic salt spray. The aluminum chalks, pits, and eventually fails at the joints, which compromises the seal and makes the window impossible to lock properly.
- Seized hardware on sliders and French doors. Standard zinc-coated screws and hinges corrode in salt-laden humidity within a few seasons. We replace them with stainless hardware as part of every Key Biscayne installation, because the inland spec simply does not survive here.
- Fogged or failed seals on impact glass. High humidity combined with salt exposure accelerates seal failure in any insulated glass unit not rated for a marine environment. If you see fog between the panes, the seal is gone and the insulating gas has escaped, which compromises both energy performance and impact integrity.
- Jalousie windows flagged during inspection. Original jalousie windows cannot be grandfathered during a permitted renovation under Miami-Dade HVHZ rules, and inspectors flag them routinely on Key Biscayne real estate transactions. We handle that replacement with NOA-rated impact windows and provide the documentation the buyer, the inspector, and the insurance carrier all want to see.
Pricing for Impact Windows & Doors in Key Biscayne, FL
Impact window and door pricing on Key Biscayne runs higher than mainland Miami, and the marine-grade materials are the reason. A typical NOA-rated impact window for a standard opening in a Key Biscayne home runs $1,800 to $4,200 per opening installed, depending on the product line, the opening size, and the condition of the existing framing. Impact sliding glass doors run $6,000 to $14,000 installed, with the higher end reflecting the large custom openings common in oceanfront and bay-front condominiums. Impact entry doors run $3,500 to $8,000, and impact garage doors run $4,500 to $9,500. The marine-grade stainless hardware, full flashing tape, and NOA documentation are included in our quotes; those are not add-ons, they are the baseline for this island. The free estimate is always free: call (813) 320-9346 and we will walk your property and give you a written, line-item quote.
We Also Serve Cities Near Key Biscayne
Our crews serve the island and the nearby mainland, including Miami Beach, Miami, Coral Gables, and Hialeah. If you live on Key Biscayne or anywhere in the surrounding Miami metro, call (813) 320-9346 and we’ll schedule a free estimate at your property.
Serving Key Biscayne, FL - Our Local Coverage Area
We’re based in the Key Biscayne area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Impact Windows & Doors in Key Biscayne
Yes. Key Biscayne is a barrier island, and the entire island sits inside Miami-Dade County’s High Velocity Hurricane Zone, which requires NOA-approved impact products on every structure regardless of its distance from the oceanfront. There is no exemption for bay-front or interior streets. Call (813) 320-9346 and we’ll confirm the code requirements for your specific opening.
Because Miami-Dade HVHZ rules do not allow original jalousie windows to be grandfathered during a permitted renovation, and inspectors on Key Biscayne flag them routinely during any real estate transaction. The windows may still operate, but they are non-compliant with current impact codes and cannot be certified as such. We replace them with NOA-rated impact windows and document everything for the inspector and the insurance carrier.
On Key Biscayne, the combination of 360-degree salt spray from the Atlantic and Biscayne Bay plus year-round humidity strips the protective finish off aluminum frames within months, causing white chalking and pitting that eventually compromises the seal and lets water into the wall. In Coral Gables, the same frame would last years longer because the salt load is dramatically lower. That is why we specify marine-grade frames and stainless hardware on every Key Biscayne installation.
No. Fog between the panes means the seal has failed and the insulating gas has escaped. The humidity outside did not cause it; the seal failed, and now the window has lost both its energy performance and part of its structural integrity. We will inspect it and give you a straight answer on whether it needs replacement or repair. Call (813) 320-9346 and we’ll look at it.
A properly specified marine-grade impact window with stainless hardware and a factory-applied marine finish should perform for 20 to 30 years on Key Biscayne before the frame or hardware needs attention, assuming routine cleaning and maintenance. An inland-spec window in the same location will often show frame pitting and hardware corrosion within five to seven years. We register both warranty layers in writing so you know exactly what is covered and for how long.
Written by Dale Kessler, Owner at TruePane Windows & Doors. If the pane is not true, the job is not done.
Six Reasons Homeowners Choose TruePane Windows & Doors
Impact systems engineered to design pressures up to +/-100, matched to your wind zone - your openings hold when the storm arrives.
Low-E insulated impact glass from our manufacturer lines commonly cuts monthly cooling bills 20-30%.
Laminated impact glass shuts out up to 40% of outside noise - traffic, neighbors, weather.
Monitoring services run $30-90 a month. Laminated impact glass resists forced entry around the clock, with no subscription.
Florida homeowners average around 25% savings on the windstorm portion of their policy after protecting every opening - some homes qualify for more.
A full impact package upgrades curb appeal, buyer confidence and appraised value in one project.



Before
After
Before
After
Before
After