Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
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After3-Panel Sliding (3-Lite Roller) Windows in Lantana, FL
A 3-panel sliding window – also called a 3-lite roller – divides a wide opening into three glazed panels, with the center panel fixed and both outer panels operable on a continuous track. In Lantana, where waterfront lots, bungalow renovations, and post-2000 tract homes all create openings wider than a standard 36-inch unit can fill cleanly, the 3-lite configuration is often the most practical answer. It delivers full cross-ventilation from two sliding panels while keeping the framing load off a structural center post.
Sightline Windows & Doors has installed our Window Installation services across Lantana’s barrier island side, along Hypoluxo Road, and through the older stock neighborhoods near Lake Drive – every one of those installations tied to a written price that cannot change between survey and invoice. If you’re sizing a wide coastal opening or replacing a failed slider that’s letting humid air in, call us at (561) 461-2062 and we’ll schedule a measured survey at no charge.
Every 3-lite roller we install is part of our broader Window Installation in Lantana service, which covers everything from single-hung replacements to custom geometric units across eight manufacturer lines.
When You Need 3-Panel Sliding (3-Lite Roller) Windows
- An opening wider than 60 inches that a single or double slider can’t fill cleanly. In Lantana’s older ranch-style homes – particularly in the blocks west of Sixth Avenue – original window openings were often framed at 72 to 96 inches. A 3-lite unit fills that rough opening without requiring new structural framing or a custom mullion add-on from a separate contractor.
- Failing tracks or corroded rollers on an existing wide slider. Salt air from the Intracoastal and Lake Worth Lagoon accelerates aluminum oxide buildup on roller hardware. When both panels are sticking or jumping off the track, the frame itself is usually compromised and a full replacement – rather than a track repair – is the accurate repair.
- A living room or dining area that needs cross-ventilation without sacrificing wall space for a casement swing. The 3-lite opens from both ends simultaneously, which creates air movement without requiring clearance on either side of the window for an outswing arm.
- Impact-code compliance on a non-compliant wide opening. Palm Beach County’s building code requires impact-rated glazing or an approved shutter system on all openings. Many Lantana homes built before 2002 carry original single-pane sliders that pass no current wind-load test. A CGI or ES Windows 3-lite unit in DP-40 or higher rating resolves that gap with documentation.
- High SHGC on a west- or south-facing wall that’s overheating interior spaces. Lantana’s afternoon sun hits west-facing walls hard from April through October. A 3-lite with a low-E coating and a SHGC at or below 0.25 measurably reduces cooling load – which Florida’s Energy Conservation Code now mandates for most residential replacements anyway.
- Aesthetic continuity across a wide facade. A single 90-inch opening filled by one double slider looks asymmetrical and undersized. Three equal-width lites – typically 30 inches each in a 90-inch opening – give the facade balanced proportion that a home appraiser or future buyer will read correctly.
Our 3-Panel Sliding (3-Lite Roller) Windows Process
- Measured Survey – the document you keep. A Sightline technician arrives at your Lantana address, measures the rough opening at three points (head, sill, and mid-span), reads the existing frame condition, and records the sightline – the visible glass dimension once the frame is in place. That written document is the basis of your quote. Under Haven Clause 1 (Have It in Writing), the quote and the measured survey are the same document. You leave that meeting with a price in dollars, not a callback window.
- Product specification and permitting. We select the manufacturer and series – CGI’s Sentinel line for high-DP coastal applications, ES Windows’ Series 8000 for mid-range energy performance, or CWS units for custom sizing when the rough opening is non-standard. We then pull the Palm Beach County building permit required for structural window replacements. Lantana falls under Palm Beach County’s building department jurisdiction, and permitted work is a condition of resale disclosure and homeowner’s insurance in most policies. We handle the permit; you don’t have to track it.
- Order and lead-time communication. Impact-rated 3-lite units are manufactured to the measured opening size – they are not pulled from warehouse stock. Current lead times for CGI and ES Windows units ordered through Sightline’s Lantana operations run between three and six weeks depending on the series and glass package. We give you a written target date at the point of order. You are not waiting for an ambiguous phone call.
- Installation day – documented at every stage. Our background-checked, uniformed crew removes the existing frame, addresses any water damage or sill rot found in the rough opening before the new unit goes in, and sets the 3-lite in a continuous sill track with shim and seal at the required tolerances. Under Haven Clause 4 (Evidence on Every Job), we photograph the rough opening before work begins, the frame during installation, and the completed unit with hardware confirmed. Those photos are yours.
- Inspector sign-off and final walkthrough. Because we pulled the permit, we also schedule the Palm Beach County inspection and are present when the inspector arrives. After sign-off, we walk the installation with you: both panels operate on the track, the weep system is clear, the locks engage at the correct keeper position, and the glazing shows no visible distortion. If anything on that list is not confirmed, the 365-Day Done Right Promise covers it – in writing, not as a courtesy.
BeforeAfter3-Panel Sliding (3-Lite Roller) Windows Pricing in Lantana
3-panel sliding windows in Lantana typically cost between $1,100 and $3,400 per unit installed, depending on size, glass package, frame material, and whether impact-rated glazing is required. That range accounts for everything from a standard 72-inch aluminum slider with low-E glass on an interior wall to a 96-inch CGI Sentinel impact unit on a coastal-exposure wall facing Lake Worth. The figures below reflect what Sightline has documented on jobs completed in Lantana and surrounding Palm Beach County communities.
| Configuration | Typical Installed Range |
|---|---|
| 72-inch aluminum 3-lite, low-E glass, non-impact | $1,100 – $1,600 |
| 72-inch impact-rated 3-lite (DP-40), standard low-E | $1,600 – $2,200 |
| 84-inch impact-rated 3-lite, laminated low-E glass | $2,000 – $2,700 |
| 96-inch impact-rated 3-lite, high-DP coastal spec | $2,400 – $3,400 |
| Custom sizing or non-standard frame condition (add) | $150 – $600 per unit |
| Palm Beach County permit fee (if applicable) | $85 – $220 typical |
What moves the number up or down:
- Glass package. Standard clear-tinted low-E costs less than laminated impact glass with a ceramic-frit spacer bar, which costs less than triple-pane or specialty acoustic glazing. In Lantana, most homeowners replacing windows on an exterior coastal wall opt for laminated impact glass to satisfy both the wind-load code and the insurance rider in one product.
- Frame condition at removal. Sill rot is common in Lantana homes built before 1990, particularly in blocks within four hundred feet of the water. If we expose soft wood or corroded embedded metal when we pull the old frame, we document it, price the repair separately in writing, and wait for your confirmation before proceeding. Haven Clause 5 (No Surprises) is not aspirational – it’s how the job is structured from the first visit.
- Opening width and panel count. A true 3-lite in a 96-inch opening requires a longer continuous sill track and more precise shimming than a 72-inch unit. Labor for wider units runs about 30 to 45 minutes longer per window, and that time is priced into your written survey, not invoiced afterward.
- Second-floor or elevated installation. Lantana properties with second-story openings require ladder staging and an additional crew member for safe handling of wide glazed panels. That cost is visible on the quote before work starts.
We do not charge for the initial measured survey or the written estimate. If you have a competitor’s written quote, bring it. Sightline offers a free second opinion on any written estimate – we will read the scope, identify what is and isn’t specified, and give you our written number on the same day.
Call (561) 461-2062 to schedule your survey. The estimate you receive is the price you pay.
FAQs – 3-Panel Sliding (3-Lite Roller) Windows
How is a 3-panel sliding window different from a regular double slider?
A 3-panel sliding (3-lite roller) window has three glazed sections – one fixed center panel and two operable outer panels – while a standard double slider has two equal panels with both operable. The 3-lite configuration works better in wide openings above 72 inches because the fixed center panel eliminates the need for a structural mullion post, and both operable panels can open simultaneously for maximum airflow without requiring additional framing work, unlike Awning & Hopper Windows. In Lantana homes with wide living-area openings facing west toward prevailing afternoon breezes off the lake, that simultaneous opening matters for ventilation. Call (561) 461-2062 if you’re not sure which configuration fits your rough opening – we’ll measure it at no charge.
Do 3-lite roller windows require a permit in Lantana, FL?
Yes. Any structural window replacement in Lantana falls under Palm Beach County’s building permit requirement, which applies to frame-out replacements regardless of window size. Sightline pulls that permit as part of every installation – it is included in the scope document you receive before work starts, and we are present at the inspection. Unpermitted window work creates a disclosure obligation at resale and can void wind-mitigation insurance credits, so skipping the permit is not a money-saving option; it’s a liability that transfers to the homeowner at closing.
Are impact-rated 3-panel sliding windows required in Lantana?
Palm Beach County requires that all window replacements meet the current Florida Building Code wind-load requirements for the installation’s design pressure zone. Lantana’s coastal proximity puts most properties in a zone where DP-35 or higher is the minimum for operable units, and many waterfront addresses on or near the Intracoastal require DP-40 or greater. Impact-rated 3-lite units from CGI or ES Windows meet those ratings with a single laminated glazing unit, eliminating the need for an accordion shutter on the opening, which is also true for Casement Windows. We specify the correct DP rating from the measured survey; you see it on the written quote before the unit is ordered.
How long does a 3-panel sliding window installation take in Lantana?
A single 3-lite roller replacement – removal of the old unit, rough opening prep, frame installation, glazing confirmation, and hardware check – typically takes three to five hours for one window on a standard ground-floor Lantana installation. Wider units (above 84 inches) or second-floor openings add roughly 45 to 90 minutes. If multiple units are being replaced in the same visit, the overall day is longer but individual window time decreases as the crew develops a rhythm with your home’s framing. We give you a time window for arrival and stay until the inspection walkthrough is complete.
What happens if a problem shows up after the installation is done?
Every installation Sightline completes in Lantana is covered by the 365-Day Done Right Promise – written into the Haven Standard, not offered as a verbal assurance. If a panel sticks, a seal fails, or a roller shows abnormal wear within 365 days of installation, we come back and make it right at no additional charge. The documented photo record we leave after every job is part of how that claim gets resolved quickly: we have a baseline of what the installation looked like the day it was completed, so there’s no argument about what was present at handoff.
Key Takeaways
- 3-panel sliding (3-lite roller) windows are the right choice for openings wider than 60 inches – they fill wide spans without structural framing changes and allow ventilation from both operable panels simultaneously.
- Installed prices in Lantana run from roughly $1,100 to $3,400 per unit depending on size, impact rating, and frame condition.
- Palm Beach County requires a permit for all frame-out window replacements; Sightline pulls it and is present at inspection.
- Every Sightline installation begins with a measured survey that becomes the written price – under Haven Clause 1, the quote and the document are the same thing and cannot diverge.
- All completed installations are covered by the 365-Day Done Right Promise and include a documented photo record.
- Sightline’s home base serves Lantana and the surrounding Palm Beach County market from a single independently owned and operated operation under the Haven Standard since 2012.
Schedule Your Measured Survey in Lantana
If you have a wide opening that a standard slider won’t fill, an existing 3-lite roller that’s sticking or leaking air, or a coastal-exposure wall that’s still running single-pane glass without impact rating, the next step is a measured survey – not a ballpark number over the phone. Sightline Windows & Doors carries 3-lite units from CGI, ES Windows, and CWS in configurations from 72 to 120 inches, each specified to the performance tier your Lantana opening requires, alongside Bay & Bow Windows. The survey is free. The written price you receive from it is the price you pay.
Call (561) 461-2062 to book your survey. A live person answers 24 hours a day. You can also request a free second opinion on any written estimate you’ve already received – bring us the document and we’ll review it the same day, at no charge.
Written by Sonia Raman, Owner at Sightline Windows & Doors Lantana, serving Lantana.