CWS Sliding & Patio Doors Nationwide | Sightline Windows & Doors Lantana

CWS Sliding & Patio Doors: The Lantana Owner’s Guide

We stock and install CWS-compatible sliding and patio door systems in Lantana, with typical installed replacement costs running $1,800 to $4,200 depending on frame size, impact rating, and glazing spec. Most CWS hardware components - rollers, tandem assemblies, locking mechanisms, and weatherstrip kits - are available same-day from our local inventory. Homeowners usually discover the failure when the door sticks in the track during humid mornings, the lock bolt no longer throws fully into the jamb, or daylight shows between the sash and frame where the pile weatherstrip has compressed flat after years of salt air exposure.

Call (561) 461-2062

Which CWS Models This Applies To

CWS produces several sliding and patio door series that circulate in South Florida, and the part you need depends on which generation you own. The CWS 312 Series and CWS 5400 Series are the two we encounter most often in Lantana homes built between 2015 and 2022, particularly in the Hypoluxo Island and South Palm Beach corridor where CWS was specified heavily during that construction cycle.

To identify your unit, check the edge of the operable sash or the header track for a stamped aluminum label. The series number appears first, followed by the nominal size and glazing code. If the label is painted over or missing, measure the visible glass width and height, the overall frame depth (typically 2⅝ inches or 3¼ inches), and count the rollers - the 312 Series runs a single tandem truck assembly, while the 5400 Series uses a dual-trolley system with a heavier 1½-inch stainless steel wheel.

OEM CWS parts ship from the manufacturer’s Miami-Dade distribution center with a three- to five-day lead time. We also stock quality aftermarket equivalents from Truth Hardware and Amesbury that match the critical dimensions and load ratings at a lower unit cost. The aftermarket rollers use the same ¼-inch axle pin and 600-pound dynamic load spec, but the stainless alloy differs slightly - we note this on the written quote so you see the specification, not just the brand name.

Signs Your CWS Sliding & Patio Door Is Failing

• The door requires shoulder force to move. This usually means the tandem roller assembly has seized or the wheels have flat-spotted from sitting in one position through a wet season. In Lantana, salt air accelerates bearing corrosion inside the sealed roller housing, and we see this most on east-facing doors within 800 yards of the Intracoastal.
• The handle lifts but the lock bolt does not engage. The mortise lock mechanism has worn cam lobes or the linkage between handle and bolt has slipped out of adjustment. On CWS units, the zinc alloy cam is the weak point - it erodes where it contacts the steel keeper, and once the profile is worn, adjustment cannot restore full throw.
• Visible gap at the meeting stile when closed. The interlock weatherstrip has compressed or the door has dropped on worn rollers, breaking the seal between fixed and operable panels. This gap passes air and water; during a driving summer storm in Lantana, it will leak.
• Grinding or popping sound from the track. The roller wheels have fractured, the axle pin is walking, or debris has packed into the track profile. We have found crushed gecko nests and accumulated sand from beach-adjacent properties jamming the lower track on CWS 5400 units.
• Condensation between glass panes. The insulated glass unit (IGU) seal has failed, allowing moist coastal air into the airspace. This is not a hardware issue but a glazing failure - the IGU must be fabricated to the exact sightline dimension and re-glazed into the existing sash.

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Replacement Cost & What’s Included

What drives the range: frame size (CWS nominal sizes run from 5 feet to 12 feet in width), impact rating (HVHZ certification adds material cost), and glazing spec (double-pane versus laminated impact glass). Every quote we write in Lantana lists the part number, the labor hours, and the unit price - Haven Clause 1. The 365-Day Done Right Promise covers the installation and hardware function; IGU seal failure carries the manufacturer’s warranty, which we document in the photo record you receive.

DIY or Call Us?

An owner can safely inspect the roller track for debris, verify the lock keeper is tight to the jamb, and check the weatherstrip pile for flattening. These checks cost nothing and tell you whether the issue is adjustment or component failure.

Where DIY goes wrong: the tandem roller assembly on a CWS sliding door supports 80 to 120 pounds of glass and aluminum per panel, and the panel must be lifted vertically out of the track while level - a two-person operation with real consequence if the panel tips. We have been called to Lantana homes where a dropped panel bent the frame stile, turning a $400 roller job into a $2,000 sash replacement. The mortise lock also interfaces with the multi-point system; incorrect installation can leave the door secured only at the handle, with the auxiliary bolts retracted.

We carry CWS-compatible rollers, locks, and weatherstrip on our trucks. Call (561) 461-2062 to schedule your free estimate - we will measure, specify the part, and write the price before any work starts.

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