Therma-Tru Door Installation Nationwide | Sightline Windows & Doors Tamiami

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

Therma-Tru door installation in Tamiami typically runs $1,800-$4,200 for a complete replacement, depending on whether you’re keeping the same rough opening or reframing for a different size or swing. We stock Therma-Tru-compatible components across the Classic-Craft, Fiber-Classic, and Smooth-Star series, and most Tamiami jobs we measure in the morning are installed within the week. Most homeowners first realize something’s wrong when the door sticks in summer, won’t latch flush, or daylight shows between the sweep and the threshold - signs that the composite frame has shifted, the hinges have pulled, or the multi-point locking hardware has worn out of tolerance.

Call (786) 321-9118

Which Therma-Tru Models This Applies To

Therma-Tru builds fiberglass entry systems in three core series we install regularly in Tamiami. Classic-Craft uses a dense polyurethane core with oak or mahogany grain and accepts stain; Fiber-Classic has a softer grain pattern and is paint-grade only; Smooth-Star is the flat-skin, paint-ready line common in modern Tamiami stucco homes. Each series uses distinct hinge mortise spacing and threshold profiles, so a Classic-Craft slab will not hang correctly on Fiber-Classic jambs without machining.

To identify your unit, open the door and check the hinge edge of the slab for a stamped date code and series mark, usually within 6 inches of the top hinge. The frame head should carry a sticker with the NOA (Notice of Acceptance) number - in Miami-Dade, this matters for wind-borne debris compliance, and not every Therma-Tru configuration carries the same NOA. We verify this before ordering because we’ve seen homeowners in Tamiami buy the right slab with the wrong impact rating for their TAS 201 or HVHZ zone, only to fail inspection.

On OEM versus quality aftermarket: Therma-Tru proprietary hinges, multi-point locks, and composite sills are engineered to their specific jamb depths and screw pull-out values. We source OEM hardware for locksets and hinges, but we also stock heavy-duty aftermarket thresholds from Endura and Pemko where the original composite sill has degraded - the key is matching the exact rise, slope, and door-bottom profile so the sweep seals without drag.

Signs Your Therma-Tru Door Installation Is Failing

• The door binds at the top corner in summer, then gaps in winter. This is the fiberglass slab expanding against a jamb that wasn’t shimmed with seasonal movement in mind. In Tamiami’s humidity cycle, a frame shimmed too tight will compress the weatherstrip and eventually distort the hinge mortise.
• Daylight visible under the sweep, or water pooling on the interior sill. The composite threshold cap has cracked or the adjustable riser has stripped its threads. On Therma-Tru units, this often starts at the mitered corners where the sill meets the jamb legs.
• The multi-point lock throws but the deadbolt doesn’t seat, or the handle lifts without resistance. The lock mechanism has worn, or the keepers in the frame have shifted. On Classic-Craft and Fiber-Classic, the keepers are set in composite jamb material that can crush if the mounting screws are over-torqued during a previous adjustment.
• The door rattles in wind despite being closed. The compression weatherstrip has taken a set and no longer springs back, or the hinge screws have backed out enough that the slab sits 1/8 inch off the stop. We’ve found this repeatedly in Tamiami homes near the Trail where traffic vibration contributes.
• Finish bubbling or delaminating at the bottom rail. Water is wicking up through the end grain of the wood edge or through a breached sill seal. On Smooth-Star, the fiberglass skin itself won’t rot, but the composite stile underneath can saturate and swell.

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Replacement Cost & What’s Included

What drives the range: the series grade (Smooth-Star costs less than Classic-Craft), glass package (clear, Low-E, or impact), and whether the rough opening is plumb and square. We measure with a laser and story pole; if the frame is out more than 3/16 inch in any direction, we note it on the written scope and price the correction before we start. Haven Clause 1 means the measured survey you keep and the final invoice are the same document. Every Therma-Tru installation we complete in Tamiami carries the 365-Day Done Right Promise and leaves a documented photo record of the rough opening, the shim pattern, and the finished sightline.

DIY or Call Us?

There are two things a homeowner can safely check before calling: whether the hinge screws are loose (tighten with a manual screwdriver, not a drill, to avoid stripping the composite jamb), and whether the threshold riser is simply adjusted too low. Beyond that, Therma-Tru doors are heavy - a 3′-0″ x 6′-8″ fiberglass slab weighs 80-100 pounds - and the multi-point lock hardware requires precise keeper alignment to both secure and seal. We’ve been called to Tamiami jobs where a well-intentioned owner routed the wrong depth for a deadbolt or cracked the composite sill trying to pry out a threshold cap. The cost of fixing that damage exceeds the original installation quote. If you’re seeing the symptoms above, call (786) 321-9118. We’ll measure it right, order it right, install it once.

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