Double Hung Windows

Double Hung Windows in Hobe Sound, FL | Sightline Windows & Doors Hobe Sound

Double hung windows remain one of the most requested styles we install across Hobe Sound and northern Palm Beach County. The two operable sashes slide vertically past each other, giving you controlled ventilation from the top, bottom, or both simultaneously. In our coastal environment, that flexibility matters. You can draw cooler air low while letting hotter air escape high, or reverse the pattern depending on wind direction off the Intracoastal or Atlantic.

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At Sightline Windows & Doors Hobe Sound, we spec double hung windows from our PGT, CGI, CWS, ES Windows, ECO, and Mr-Glass lines specifically for Florida’s High-Velocity Hurricane Zone. Every unit carries laminated impact glass and the Miami-Dade NOA or Florida Product Approval documentation your permit office will require. We’ve installed these in homes from Jupiter Island to Stuart, and we understand the wind-borne debris requirements that govern Hobe Sound construction. Call (772) 362-5967 to schedule your free on-site measurement and written quote.

Product Overview - Double Hung Windows

Double hung windows occupy a unique position in Florida residential architecture. The traditional divided-light profile complements everything from Old Florida ranch homes to newer Mediterranean and coastal contemporary builds going up around Hobe Sound. Unlike single hung windows, where only the bottom sash moves, both sashes in a double hung tilt inward for cleaning and glide vertically for ventilation control.

The impact-rated versions we install aren’t retrofits of a standard window. They’re engineered from the frame out for hurricane conditions. The laminated glass, the reinforced interlocks where the sashes meet, the heavy-duty balance systems that keep both sashes operable under repeated cycling - these are purpose-built for coastal Florida, not adapted from inland product lines.

What draws Hobe Sound homeowners specifically to this profile? The tilt-in feature is practical for second-story cleaning without ladders. The equal sight lines (both sashes the same size) preserve traditional proportions that look correct on homes with symmetrical facades. And the vertical operation doesn’t project into exterior walkways, porches, or tight setbacks common on smaller Hobe Sound lots near the water.

We install these in aluminum and vinyl frame options, depending on your home’s exposure, your maintenance preferences, and the aesthetic you’re matching. Both materials perform when specified and installed correctly. The key is matching the right frame, glass package, and design pressure rating to your specific Hobe Sound address.

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Technical Specifications

• Frame Materials: Aluminum - thermally broken options available; Vinyl - multi-chambered profiles with welded corners
• Glass Options: Laminated Impact Glass with PVB interlayer (standard for HVHZ compliance); Low-E Insulated Glass (dual-pane with argon fill for thermal performance); Tinted Glass (solar heat gain reduction); Clear Glass (non-impact, available only in non-HVHZ applications where permitted)
• Finish Colors: White, Almond, Bronze, Black, Tan - powder-coated on aluminum, co-extruded or painted on vinyl
• Screen Options: Half Screen (covers operable sash only); Full Screen (covers full opening, removable)
• Design Pressure: Matched to your specific wind zone per Florida Building Code, up to +/-100 PSF - never higher than required for your location
• Compliance Documentation: Miami-Dade NOA and Florida Product Approval numbers issued per specific configuration; verify on your quote for permit submittal
• Installation Standard: AAMA 2400/2410 practice; AAMA 812 low-expansion foam perimeter sealant

Hurricane & Compliance Performance

Laminated Impact Glass with PVB Interlayer

The glass in our double hung windows isn’t just thicker. It’s two lites bonded with a polyvinyl butyral (PVB) interlayer that holds shattered glass in the frame even after direct impact from wind-borne debris. The window may crack, but the barrier remains intact, protecting the building envelope from internal pressurization during a storm.

Miami-Dade NOA / Florida Product Approval

Every configuration we quote carries its own Notice of Acceptance from Miami-Dade County or Florida Product Approval number. These aren’t blanket certifications. They’re issued for specific frame, glass, and hardware combinations. We’ll list the exact NOA or approval number on your quote so your permit application in Hobe Sound or Martin County moves without documentation delays.

FBC / HVHZ Compliance

These windows are engineered to Florida Building Code High-Velocity Hurricane Zone requirements. That means the frame, sash, hardware, and glazing as a system were reviewed for the most stringent wind-borne debris conditions in the state. Hobe Sound sits in a zone where this level of compliance isn’t optional - it’s code.

TAS 201 / 202 / 203 Testing Context

The protocol family for HVHZ-rated products includes TAS 201 for large-missile impact resistance, TAS 202 for cyclic wind-pressure loading, and TAS 203 for forced-entry resistance. Our double hung windows are tested and rated under this complete protocol family, not selective portions. That’s the difference between a product that meets Florida’s standards and one that merely claims to.

Design Pressure Matched to Your Wind Zone

Design pressure is a PSF rating, not a wind speed. We match the rating to your specific Hobe Sound location’s requirements, up to +/-100 PSF. We don’t oversell you a higher rating than your address requires, and we never install below code. Your quote will specify the exact DP rating for your configuration.

Energy Performance Options

Low-E insulated glass packages are available across our lines. The Low-E coating reflects infrared heat while admitting visible light, and the insulated airspace (typically argon-filled) reduces thermal transfer. In Hobe Sound’s cooling-dominated climate, this matters for interior comfort and load on your HVAC system.

Color & Glass Options

Our five standard finishes cover the palette we see most requested in Hobe Sound and the surrounding barrier island communities. White remains the default for coastal homes, reflecting heat and pairing cleanly with Bahama shutters and light stucco. Almond and Tan suit the warmer, earth-toned Mediterranean and Tuscan-influenced architecture common in newer Hobe Sound developments. Bronze and Black have gained traction on contemporary builds and as contrast elements on white or light-gray exteriors - they also hide dirt and salt accumulation between cleanings better than lighter colors.

Glass selection depends on orientation and exposure. The laminated impact glass with PVB interlayer is non-negotiable for HVHZ compliance and comes standard. From there, Low-E insulated glass is our recommendation for west- and south-facing walls that take direct afternoon sun, or for any room where you struggle with heat gain. Tinted glass adds another layer of solar control for unshaded exposures. Clear glass is available only where local amendments permit non-impact products, which is increasingly rare in our area.

Screen selection is practical: half screens cover just the operable sash, preserving sight lines and reducing material cost. Full screens cover the entire opening and are removable for cleaning or winter storage. Most Hobe Sound homeowners on the water opt for full screens to keep no-see-ums and smaller insects out during evening ventilation.

Installation by Sightline Windows & Doors Hobe Sound in Hobe Sound

Window performance lives or dies at installation. A perfectly engineered, NOA-rated double hung window installed out of square, with gaps in the perimeter seal, or without proper fastening to the structural frame, will fail under pressure - and the manufacturer won’t honor the system warranty because the installation violated their approved methods.

We follow AAMA 2400/2410 installation practice on every Hobe Sound job. That means we start with a pre-install inspection of the rough opening for level, plumb, and square. We check for rot, termite damage, or compromised framing that needs repair before the new window goes in. We set the unit on a bed of sealant, shim to plumb, fasten through the jamb or fin per the manufacturer’s NOA-approved pattern, and seal the perimeter with AAMA 812 low-expansion foam. The foam fills irregular gaps without distorting the frame, then we cap with backer rod and sealant for a watertight, airtight boundary.

After installation, we operate both sashes through their full travel, verify the tilt-in latches engage and release smoothly, and run a water test on the exterior seal. We clean the glass, remove our protection, and haul away the old units.

Hobe Sound presents specific considerations. We’re in a coastal exposure zone where salt air accelerates corrosion on improperly specified hardware. We’re in a jurisdiction that enforces HVHZ compliance strictly, with permit offices that will reject submittals missing the correct NOA or Florida Product Approval documentation. And we’re in a wind zone where design pressure ratings matter for both code compliance and insurance documentation. We’ve navigated these requirements for years in Hobe Sound, Jupiter Island, Tequesta, and Stuart. We don’t guess.

Frequently Asked Questions - Double Hung Windows

What wind zone / design pressure is the Double Hung Windows rated for?

Design pressures are matched to your specific Hobe Sound address’s wind zone per Florida Building Code, up to +/-100 PSF. Your exact rating depends on exposure category, building height, and proximity to the coast. We’ll specify the required DP on your written quote after a site evaluation. Call (772) 362-5967 for an exact quote - estimates are free.

What is the lead time?

Lead times vary by manufacturer line, configuration complexity, and current demand. Standard sizes in common finishes typically move faster than custom sizes or specialty colors. We’ll give you a realistic production and delivery window when we quote your project, and we coordinate delivery to avoid leaving openings unprotected. Call (772) 362-5967 to discuss your timeline.

Does it require a Miami-Dade NOA or Florida Product Approval submittal for my permit?

Yes. Hobe Sound and Martin County permit offices require Miami-Dade NOA or Florida Product Approval documentation for all impact-rated window installations. We provide the specific approval number for your quoted configuration with every proposal, formatted for direct submittal. This is standard on every Sightline Windows & Doors Hobe Sound project. Call (772) 362-5967 to start your permit-ready quote.

Can I customize the size or configuration?

Yes, within the tested and approved size ranges documented in each manufacturer’s NOA. We can quote custom widths, heights, divided lite patterns, and hardware finishes where the manufacturer has extended their approval. Some lines offer more flexibility than others. We’ll match your architectural requirements to the right product line. Call (772) 362-5967 to review options for your specific openings.

How do I maintain the frame?

Rinse aluminum and vinyl frames quarterly with fresh water to remove salt accumulation, especially on east- and southeast-facing exposures in Hobe Sound. Operate both sashes monthly to keep balances and weatherstripping supple. Lubricate locks and tilt latches annually with a silicone-based product. Avoid petroleum-based lubricants that attract grit. The tilt-in feature lets you clean both glass surfaces from inside, which we recommend doing after pollen season and before hurricane season. Call (772) 362-5967 if you notice operation changes that might indicate balance or alignment issues.

Get a Quote - Double Hung Windows in Hobe Sound

We’re ready to measure your openings, spec the right double hung configuration for your Hobe Sound home, and deliver a written, line-item quote with the NOA or Florida Product Approval numbers your permit office needs. No pressure, no obligation, no surprises once work starts. Call (772) 362-5967 or reach out through our site to schedule your free on-site evaluation.

Written by the team at Sightline Windows & Doors Hobe Sound, serving Hobe Sound, Jupiter Island, Tequesta, and Stuart since 2008.