Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Sliding glass doors
PGTCGI
Before
After
Before
After
Before
AfterTherma-Tru Door Installation: The Miami Beach Owner’s Guide
Therma-Tru door installation in Miami Beach typically runs $900-$2,600 installed, depending on whether you need a slab swap or a full frame-out replacement, and we stock the common parts on our trucks so most jobs are done in a single visit. Most homeowners don’t discover a problem until the door sticks, the sweep drags, or light pours through a gap that wasn’t there last hurricane season. The salt air, humidity, and afternoon downpours on Miami Beach are relentless on entry doors, and we’ve seen the same failure pattern repeat for 15 years: the weatherstripping fails first, then the threshold, then the door itself starts to shift.
Which Therma-Tru Models This Applies To
We install and service the full Therma-Tru lineup sold in South Florida, including Classic-Craft, Fiber-Classic, Smooth-Star, Pulse, and the Benchmark door systems. The single most common compatibility gotcha we run into on Miami Beach is this: a door that was original to a condo building or spec home in the 2000s is often a Therma-Tru frame with a non-Therma-Tru slab swapped in later, so you can’t just order a slab by model name. You need the hinge pattern, the slab thickness (1-3/4″ is standard for exterior, but we see plenty of 1-3/8″ interior-weight doors hung in exterior openings down here), and the swing handedness verified on site.
Therma-Tru’s OEM parts are well made, and for weatherstripping, sweeps, and thresholds we generally recommend sticking with the genuine Therma-Tru part because the profiles are model-specific. For hinges, multipoint lock bodies, and astragals, there are quality aftermarket equivalents that match or beat OEM specs for less money, and we’ll lay out both prices on a written estimate so you decide with full information. We’re an independent installer, not affiliated with Therma-Tru directly, which means we’re free to tell you when the aftermarket part is genuinely the better buy and when it isn’t.
The label you want is on the hinge edge of the slab. It’ll show the model, manufacture date, and a serial number. Send us a photo of that label before we come out, and we can usually confirm parts availability the same day. And a second gotcha worth knowing: Miami Beach building code requires exterior doors to meet wind-load standards under Chapter 17 of the Florida Building Code, so if your Therma-Tru door is being replaced as part of a larger opening change, we verify the frame anchorage and the slab rating before we touch anything. Condos near the water are the strictest we deal with.
Signs Your Therma-Tru Door Installation Is Failing
- Light or air visible around the slab edges. The weatherstripping has compressed or torn, and the door is no longer sealing. On Miami Beach, this is almost always accelerated by salt exposure and daily thermal expansion from morning shade to afternoon sun.
- The door drags on the threshold or sticks at the top corner. The slab has settled or the hinges have worn, which shifts the entire geometry. Forcing it is how you crack the fiberglass skin.
- Water stains or swelling at the bottom interior corner. The threshold or its end caps have failed, and driving rains, not just hurricane storms, are pushing water under the sill. We see this on beachside entries where the prevailing east wind throws rain straight at the door.
- The multipoint lock binds or won’t throw cleanly. The lock body is out of alignment with the frame, usually because the slab shifted or the original install didn’t account for settling. A door that won’t fully lock is a door that won’t hold in a storm.
- Cracks or spiderwebbing in the fiberglass skin. Not just cosmetic. In Therma-Tru slabs, surface cracks let moisture into the core, and once the core swells, the slab is done.
Replacement Cost & What’s Included
Here’s what Therma-Tru door installation actually costs in Miami Beach, based on the jobs we’ve priced over the last year:
- Slab-only swap (door slab reused frame, new weatherstripping, hinges, sweep): $900-$1,500
- Full pre-hung replacement (new Therma-Tru slab, frame, threshold, weatherstripping, casing): $1,600-$2,600
- Add multipoint lock replacement: $250-$480
- Add rot repair to the rough opening or sub-sill: $200-$700, depending on how far the water traveled
Every estimate we write is line-itemed, and the price we quote is the price you pay. No change orders, no surprise line items after we open the wall. The spread in the range comes down to slab size and configuration (single door vs. door with one sidelite vs. door with two sidelites), whether we’re pulling a permit, and what we find behind the old frame. Labor is the bigger variable on Miami Beach, not parts. Every door installation carries our workmanship warranty, and it’s backed by the 36500-Day Done Right Promise. If it’s not done right, we make it right. That’s Ed’s name on the door, and Ed grew up in Miami; he knows what a bad install looks like after one August rain season.
DIY or Call Us?
There are things you can check yourself: take a photo of the hinge-edge label, look at whether the door has even gaps all around when closed, check if the threshold end caps are cracked. Those observations help us quote accurately before we arrive. But here’s where DIY goes wrong on Miami Beach: a Therma-Tru door is a fiberglass slab on a composite frame, and pulling that assembly out without damaging the exterior stucco or the interior drywall returns is genuinely difficult. We rebuild returns on almost every full-frame replacement we do. And if the door has a multipoint lock, getting the keeper alignment right after rehanging a slab requires patience and a level of fussiness most homeowners don’t have time for. The most expensive call we get is the one where someone already tried their own fix and now we’re correcting both the original problem and the repair.
If you want an honest assessment first, call (863) 656-0462 and we’ll talk through what you’re seeing. We’ll give you a straight answer on whether it needs a slab, a full system replacement, or just a $40 weatherstripping refresh. No pressure, no sales script.
FAQs
A properly installed Therma-Tru door in Miami Beach realistically lasts 20-30 years on the slab itself, but expect to replace weatherstripping every 3-5 years and the threshold every 7-10 years because salt air and storm-driven rain eat those components first. If the door was installed without proper flashing or anchorage, all bets are off. Call (863) 656-0462 if your door is over a decade old and showing edge wear; we’ll tell you honestly whether it’s parts or replacement time.
Most Therma-Tru doors can be repaired rather than replaced, assuming the slab core hasn’t taken on water and the hinges haven’t pulled. We replace weatherstripping, sweeps, thresholds, hinges, and lock bodies on Therma-Tru doors every week in Miami Beach. The repair question is settled by one on-site inspection, and we’ll show you the evidence before we recommend anything. Estimates are free, and a written second opinion on anyone else’s estimate costs nothing either.
A slab-only swap takes about half a day, and a full pre-hung replacement usually takes one full day including trim and cleanup. If we find rot behind the old frame, add the appropriate time for repair. We schedule Miami Beach jobs with the understanding that weather and building access, especially at condos with secure lobbies, can shift timelines, so we’ll give you a window and communicate any change as it happens.
We stock common Therma-Tru weatherstripping profiles, sweeps, thresholds, and hinges on our trucks, which covers most repair scenarios in one visit. Slabs and full pre-hung units are ordered with Therma-Tru’s lead time, typically 2-4 weeks depending on the model and finish. If we don’t have your part, we’ll tell you before we schedule, not after we’re on site. Call (863) 656-0462 with the label info from your hinge edge and we’ll confirm availability same day.
Written by Ed Winslow, Owner, Winslow Windows & Doors at Winslow Windows & Doors, serving Miami Beach and nearby areas.
Six Reasons Homeowners Choose Winslow Windows & Doors
Impact systems engineered to design pressures up to +/-100, matched to your wind zone - your openings hold when the storm arrives.
Low-E insulated impact glass from our manufacturer lines commonly cuts monthly cooling bills 20-30%.
Laminated impact glass shuts out up to 40% of outside noise - traffic, neighbors, weather.
Monitoring services run $30-90 a month. Laminated impact glass resists forced entry around the clock, with no subscription.
Florida homeowners average around 25% savings on the windstorm portion of their policy after protecting every opening - some homes qualify for more.
A full impact package upgrades curb appeal, buyer confidence and appraised value in one project.