Therma-Tru Door Installation Nationwide | Winslow Windows & Doors

Therma-Tru Door Installation: The Miami Owner’s Guide

Therma-Tru door installation in Miami typically runs $350 to $900 for a standard entry door slab swap, including haul-away of the old unit and full weather sealing. We stock Therma-Tru-compatible hinge kits, thresholds, sweeps, and weatherstripping on our trucks, so most installations happen in a single visit. Most Miami homeowners discover the problem the hard way: the door starts dragging across the threshold in August humidity, or daylight appears under the slab where there shouldn’t be any.

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What usually starts the call is a door that won’t latch, or a threshold that’s warped from a decade of afternoon downpours. By the time you’re searching for a fix, the issue has moved past tightening screws. The good news is a proper Therma-Tru door installation in Miami doesn’t mean tearing out the frame. Often it’s the slab, hinges, or weatherseal that failed, not the rough opening.

Which Therma-Tru Models This Applies To

Therma-Tru builds door systems in distinct series lines, and the part that fits a Classic-Craft won’t necessarily fit a Smooth-Star or Pulse. That’s the compatibility gotcha nobody tells you until the new slab shows up and the hinge mortises don’t line up. We identify the exact series from the label on the hinge edge of the door, usually a white or silver sticker with the model number, manufacture date, and a serial number. No label? We measure the slab thickness, hinge spacing, and bore locations on site.

For Therma-Tru specifically, we recommend OEM or Therma-Tru-authorized replacement parts over generic aftermarket slabs. The reason is simple: Therma-Tru slabs are engineered for their specific frame and sill geometry, and Miami’s humidity exposes any mismatch within a season or two. A generic slab that’s within spec in Phoenix will swell and bind in Coconut Grove within months. We are an independent installer, not affiliated with Therma-Tru, but after 15 years in South Florida we’ve learned which combinations fail and which ones hold.

Signs Your Therma-Tru Door Installation Is Failing

• The door drags or sticks at the threshold. This is usually a warped threshold or a slab that’s absorbed moisture and expanded. In Miami’s wet season, even factory-sealed Therma-Tru slabs can move if the bottom rail was never properly sealed after trimming.
• Daylight visible under the door. The sweep has compressed or torn, and the threshold cap is worn. Once that seal fails, you’re paying to air-condition the front porch, and afternoon rain drives straight under the door.
• The latch won’t catch without lifting or yanking the handle. Hinges have sagged, or the slab dropped in the frame. Forcing the latch wears out the strike plate, and eventually the door won’t secure at all. That’s a security issue as much as an annoyance.
• Condensation or fogging in the glass insert. The insulating glass unit has lost its seal. In Miami’s constant humidity, failed seals show up fast, and they don’t get better on their own. Replacement glass inserts are model-specific, and we order them by the serial number.
• Soft spots at the bottom corner of the slab. Water has gotten past the weatherseal and wicked into the door core. This is the one that can’t be patched. It’s a slab replacement, and the sooner it’s done, the less damage to the frame.

Replacement Cost & What’s Included

A full Therma-Tru door installation in Miami, meaning new slab plus threshold, sweep, weatherstripping, and hinge adjustment, typically lands between $350 and $900. If the frame itself has damage from water intrusion, figure on the higher end because we’re pulling trim, replacing the sill pan, and resealing the rough opening. If it’s a clean slab swap on an existing frame, we’re usually in and out for the lower end.

Every quote includes parts, labor, haul-away of the old unit, and the time to seal the bottom rail and sill correctly. We don’t give a price, then add charges for disposal or “trip fees” halfway through. The estimate Ed Winslow writes is the price you pay. And if the work isn’t done right, the 36500-Day Done Right Promise means we come back and make it right. That’s the whole point of putting our name on the truck.

DIY or Call Us?

You can safely check a few things before calling. Is the hinge screws tight? Is the sweep torn or missing? Does the threshold sit level when you put a straightedge across it? Those observations help us quote accurately over the phone. What you should not do is plane a Therma-Tru slab to fix sticking. That kills the factory seal, voids the manufacturer warranty, and accelerates the exact moisture problem you’re trying to fix. A door slab is heavier than it looks, and a dropped door can break more than the tiles. This is one we tell friends and customers alike: let a professional handle the heavy lifting, the hinge mortising, and the sill work. Call (863) 862-5435 and we’ll get it done right.

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