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

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

Therma-Tru door installation in Doral typically runs $1,800-$4,200 for a complete entry system replacement, depending on whether you’re keeping the existing frame or replacing a rotted jamb. We stock Therma-Tru-compatible installation components on our trucks and can usually survey and quote same-day. Most Doral homeowners discover their Therma-Tru door needs attention when the sweep drags, the jamb splits at the strike plate, or the threshold cup lets water pool during our summer downpours.

Call (786) 460-1563

Which Therma-Tru Models This Applies To

Therma-Tru organizes its entry door lines by substrate and performance tier, and the installation approach shifts with each. We regularly work with the Classic-Craft (mahogany, oak, and canvas textures), Fiber-Classic (the original fiberglass skin), Smooth-Star (paint-ready fiberglass), and Pulse (contemporary flush-panel) series in Doral homes. Each uses a different jamb depth, typically 4-9/16″ or 6-9/16″, and the hinge mortise spacing varies between the traditional 3-1/2″ center-to-center and the newer 4″ pattern used on taller Pulse units.

Here’s the compatibility gotcha we catch most often: a Therma-Tru slab ordered for an existing frame rarely fits without re-machining, because the lock bore on Therma-Tru prehung units is set at 2-3/8″ backset with a 5-1/2″ center-to-center deadbolt spacing. Retrofit that into a standard 2-3/4″ backset frame and you’re either relocating hardware or ordering a new jamb. We check this during our measured survey, which you keep.

Sightline Windows & Doors Doral is an independent service provider, not affiliated with Therma-Tru. We source OEM jambs, thresholds, and weatherstrip kits through authorized distribution, but we’ll also spec quality aftermarket equivalents when the opening calls for it, particularly on discontinued Classic-Craft profiles where factory lead times stretch past eight weeks.

Signs Your Therma-Tru Door Installation Is Failing

• The threshold bows or the sweep drags across the tile. South Florida’s humidity swells wood-composite thresholds faster than the fiberglass slab expands. On Therma-Tru units with the adjustable aluminum sill, the screw jacks seize after about five years of salt-air exposure near Doral’s western edge. We find the sweep worn to bare metal and the sill pan pitched backward, sending water toward the interior.
• Daylight shows between the jamb and the stop molding. This means the installation screws have backed out or the rough opening wasn’t shimmed at the hinge locations. Therma-Tru’s fiberglass slab is heavy, 70-90 pounds on a standard 3/0 x 6/8, and that load transfers straight to the hinge jamb. Without proper shimming, the jamb rotates and the weatherstrip gap opens.
• The deadbolt binds or the latch misses the strike. Often misdiagnosed as a lock problem, this usually traces to jamb shift from settling or, in Doral’s newer construction, frame shrinkage as the structure dries out over its first three years. The Therma-Tru multi-point locking system on higher-end units is particularly sensitive to even 1/8″ of misalignment.
• Water stains on the interior casing, especially at the bottom corners. Therma-Tru’s composite jamb resists rot better than pine, but the end grain at the sill cut is still vulnerable. In Doral, where afternoon storms hit hard and fast, a bead of caulk failed at the brickmullion joint becomes a wick in about two seasons.
• The door closes hard or the auto-door closer strains. This can be hinge-bound, but on Therma-Tru units with the composite jamb, we check for jamb twist first. The fiberglass slab doesn’t warp, so any racking shows up as stress on the hardware. We’ve measured jamb faces out of plumb by 3/16″ on homes near Beacon Lakes where the fill soil settled unevenly.

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Replacement Cost & What’s Included

What drives the range: jamb material (pine vs. composite), lock hardware grade, and whether the rough opening needs reframing. Our quote includes the measured survey you keep, the written scope with line-item pricing, permits pulled and inspections passed, and the documented photo record. The 365-Day Done Right Promise covers the installation. Haven Clause 1 means the price on the page is the price on the invoice.

DIY or Call Us?

There’s safe checking, and then there’s the work itself.

An owner can verify the model number on the Therma-Tru hinge label, measure the slab width and height, and confirm whether the threshold is adjustable or fixed. That’s useful information to have when you call.

What goes wrong fast: Therma-Tru prehung units ship with the frame squared by temporary braces that must stay in place until the jamb is shimmed, screwed, and the lockset installed. Remove them early and the jamb racks. The multi-point lock systems require precise mortising that doesn’t forgive a 1/16″ error. And any door heavier than 80 pounds is a two-person lift with real back and finger risk. We send verified crews, background-checked and uniformed, with license numbers on record before arrival. Call (786) 460-1563 to schedule your free estimate.

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