Therma-Tru Door Installation Nationwide | Winslow Windows & Doors

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

Therma-Tru door installation in Palm Beach typically runs $950 to $3,400 installed, depending on whether you’re replacing a slab, a pre-hung unit, or a full entry system with sidelites. We stock common Therma-Tru replacement components on our trucks, and most single-door swaps are completed in a single visit. The way most Palm Beach homeowners discover they need us is the same every time: a door that suddenly drags against the threshold, light bleeding through the weatherstrip, or a frame that’s quietly rotting from the inside out after years of salt air and afternoon downpours.

Call (561) 782-7525

You’d be surprised how often a “broken door” turns out to be a failed installation from years ago, not a failed Therma-Tru product. The slab is usually fine. The rough opening, the flashing, the rot behind the brickmold? That’s what gives out first in our coastal climate. Ed Winslow grew up in El Cid, just west of the Intracoastal, so he’s been watching that exact failure happen to Palm Beach doors since he was a kid. It’s why we treat every Therma-Tru door installation as a weatherproofing job, not just a hinge-and-level job.

Which Therma-Tru Models This Applies To

Therma-Tru builds their entry systems across several series lines, and the parts aren’t as interchangeable as people assume. The Classic-Craft, Fiber-Classic, Smooth-Star, and Pulse series each use different slab thicknesses, hinge prep patterns, and weatherstrip profiles. A Smooth-Star weatherstrip will not seat correctly on a Classic-Craft door, and the hinge mortises are cut to different depths. We see homeowners buy the wrong part online all the time because the listing said “fits Therma-Tru” without specifying the series.

The fastest way to identify your door is the certification label on the hinge edge of the slab, which lists the series name and manufacturing date. If that label is gone (common on Florida doors after a few summers of humidity), we measure the slab thickness and check the corner construction. Fiber-Classic runs 1¾ inches thick; Smooth-Star is 1⅝. The corner pads are the other tell: Therma-Tru uses a distinctive corner block system that aftermarket manufacturers can’t match exactly. For Palm Beach homes, we lean OEM on weatherstripping and thresholds because salt air is unforgiving to cheap foam. For cosmetic parts like brickmold and trim, a quality composite aftermarket works fine. We’ll tell you which is which and why before we order a thing.

Signs Your Therma-Tru Door Installation Is Failing

• Door drags or sticks at the top or latch side: This usually means the slab has settled or the frame was never properly shimmed. In Palm Beach, it’s often a sign the king stud or header is shifting from moisture cycling behind the siding.
• Visible daylight around any edge when the door is closed: The weatherstrip has compressed or torn, or the door slab is warped. Either way, you’re now air-conditioning the outdoors, and the energy cost adds up fast in Palm Beach summers.
• Threshold feels spongy or water pools at the base inside: The threshold cap and the sub-sill underneath are failing. Therma-Tru thresholds have a specific interlocking profile; you can’t just caulk a generic one in and call it done.
• Doorknob side feels loose, or the latch no longer lines up with the strike plate: This is a hinge failure, usually from the weight of a Therma-Tru fiberglass slab hanging on builder-grade hinges. The hinge screws have likely stripped the frame. It’s a twenty-minute fix if caught early.
• Paint or stain blistering at the bottom six inches of the frame or brickmold: Water is wicking up from the threshold area. That means the sill pan was either installed wrong or never installed. We open these up a few times a month in Palm Beach, and the rot behind the trim is always farther along than the homeowner expected.

Replacement Cost & What’s Included

Here’s what Therma-Tru door installation actually costs in Palm Beach, line by line, so you’re comparing apples to apples when you get bids from other companies.

The spread in those numbers comes down to what we find when we pull the old door. If the rough opening is square and dry, you’re at the low end. If we find rotted framing behind the old unit (common within three blocks of the water in Palm Beach), that adds a couple hundred. What doesn’t change is the price once we give it to you. We do fixed pricing with written line items, no change orders, and every Therma-Tru door installation carries our Done Right Promise: if it’s not done right, we make it right. Ed’s name is on the truck. That’s the only guarantee you actually need.

DIY or Call Us?

There are things you can safely check before calling anyone. Confirm the hinge screws are tight (a #2 Phillips, two minutes). Check whether the weatherstrip is torn or just compressed; if it’s compressed, a hair dryer on low can sometimes revive it temporarily. Look at the threshold cap for cracks. That’s about where the safe DIY lane ends, because a Therma-Tru door is heavy (a 36-inch Classic-Craft slab runs around 95 pounds), and a door that comes off its hinges will hurt someone. We have seen more than one homeowner end up with a broken toe or a cracked sidelite after trying to reset a slab solo.

What you can’t DIY is the part that actually matters in Palm Beach: the sill pan, flashing, and sealing under and around the threshold. That’s what stops water from getting behind your flooring and into your framing. Get that wrong and you won’t know until the floor buckles a year later. If you want to size it up before committing, call (561) 782-7525 and we’ll give you a straight answer over the phone. No trip charge if you’re in our home county.

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