Therma-Tru Door Installation Nationwide | Winslow Windows & Doors

Therma-Tru Door Installation: The West Palm Beach Owner’s Guide

Therma-Tru door installation in West Palm Beach typically runs $450 to $1,200 for a full frame-and-slab replacement, depending on the model line and whether the existing rough opening needs adjustment. If you’re dealing with a failed hinge, stripped threshold, or a warped slab on an existing Therma-Tru unit, we usually complete the swap same-day because our trucks run stocked with common Therma-Tru hardware. Most owners discover the problem the hard way: the door starts dragging across the threshold in July, or the deadbolt stops aligning after a few humid months, and suddenly what used to close with one hand needs a shoulder.

Call (561) 660-9539

Which Therma-Tru Models This Applies To

We install and service the full Therma-Tru lineup you’re likely to find in Palm Beach County: the Classic-Craft and Fiber-Classic series (fiberglass slabs with realistic wood grain), the Smooth-Star line (painted fiberglass that holds up to salt air), and the Pulse and Benchmark door systems popular with builders in developments like Ibis and Mirasol. The easiest way to identify your door is the sticker on the hinge edge of the slab, but after a decade of Florida humidity those stickers turn to dust. So we work from measurements: a standard Therma-Tru entry is usually 36 inches by 80 inches, but we see plenty of 32-inch and 34-inch units in older homes from the 1970s and 1980s, especially in neighborhoods like Northwood Hills and Flamingo Park.

One compatibility gotcha worth knowing: Therma-Tru slabs and frames are engineered as a system. Mixing a new Therma-Tru slab with an old off-brand frame almost always results in a door that won’t seal or latch properly, because Therma-Tru’s compression weatherstripping and corner seal pads are sized to their frame extrusion. For OEM versus aftermarket, we’re straight with you. Genuine Therma-Tru parts give the most predictable fit and maintain any warranty left on the door. Quality aftermarket hardware like adjustable thresholds and commercial-grade hinges can be a smart, lower-cost choice when the original part is no longer made. We’ll price both and tell you which one we’d put on our own house.

Winslow Windows & Doors is an independent installer and service provider, not affiliated with Therma-Tru. We are, however, an authorized Therma-Tru installer, which means we do this work daily. We also install and stock parts for PGT, CGI, and CWS products.

Signs Your Therma-Tru Door Installation Is Failing

• The door scrapes the threshold when you open or close it. In West Palm Beach, this usually means the hinges have worn out of round and the slab has settled slightly. Fiberglass doors don’t swell much, so if it’s dragging, the hardware or the rough opening has shifted.
• You can see daylight around the edges when the door is closed. This points to failed compression weatherstripping or a frame that has pulled away from the rough opening. Your air conditioner is literally cooling the neighborhood, and the rainy season will find that gap fast.
• The deadbolt won’t throw without lifting or pulling the door. This is a latch-and-strike alignment issue, often caused by hinge wear or a slab that has started to warp after years of afternoon sun on an unshaded entry. It’s also a security concern you shouldn’t ignore.
• Water stains or soft spots appear at the base of the frame or threshold. The threshold cap or corner seal pads have failed, and water is wicking into the subfloor. In West Palm Beach’s afternoon downpours, this rots framing faster than most people expect.
• The door is harder to close in summer than in winter. That’s the fiberglass slab reacting to sustained heat and humidity combined with a frame that was never shimmed perfectly level. It’s a minor issue that becomes a major one when the hinges start to bind.

Replacement Cost & What’s Included

Here’s what we quote in West Palm Beach for Therma-Tru door installation with a trained two-person crew:

• Single slab replacement, reuse existing frame: $450 to $750 installed. Includes measuring, ordering, slab prep (hinge mortises, lockset boring), weatherstripping, and haul-away of the old slab.
• Full frame-and-slab replacement, standard 36×80 opening: $850 to $1,200 installed. Includes removal of the old unit, new Therma-Tru frame and slab, threshold, weatherstripping, shimming and leveling, exterior trim repair where needed, and full clean-up.

What changes the number is the rough opening condition. Homes in older West Palm Beach neighborhoods often have settled framing, meaning extra shimming, new trim, or even minor structural repair before the new unit goes in. We show you the situation before we touch anything, and the number we quote is the number you pay. No change orders, no surprises on the invoice. Every Therma-Tru installation from Ed Winslow and our crew is backed by the Done Right Promise: if it’s not done right, we make it right. That’s the same promise we’ve stood behind since 2011.

DIY or Call Us?

You can check a few things yourself before calling us: verify the hinges aren’t visibly loose, see if the threshold caps are cracked or pulling away, and test whether the door binds seasonally. That helps us diagnose faster. What we don’t recommend is pulling a Therma-Tru slab and trying to re-hang it yourself. These doors are heavy, the compression weatherstripping only works when everything is level and plumb to within about an eighth of an inch, and a door that closes wrong is a security liability on top of an energy drain. We have the trucks, the stock, and the experience to get it right the first time. Ed’s name is on the door, and on every job we do. Call (561) 660-9539 for a straight answer.

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