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

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

Therma-Tru door installation in Sunrise typically runs $1,800-$4,200 for a complete entry system replacement, depending on whether we’re setting a standard fiberglass slab into an existing frame or reworking the rough opening for a full pre-hung unit with sidelites. We stock Therma-Tru-compatible frames, sills, and hardware on our trucks, and most replacements in Sunrise and Plantation are completed in a single day once the measured survey is signed off. Most homeowners discover their Therma-Tru door is failing when the fiberglass skin delaminates near the sill, the multi-point lockset won’t engage after a rain, or they notice daylight between the weatherstrip and the jamb that wasn’t there last season.

Call (754) 254-5294

Which Therma-Tru Models This Applies To

We work with the full Therma-Tru catalog, but the units we see most often in Sunrise are the Classic-Craft and Fiber-Classic fiberglass lines, plus the Smooth-Star series in homes built between 2015 and 2022. The Impact-Rated DuraProtect line has become more common since the 2022 code updates in Broward County, particularly in the Welleby and Sawgrass Estates areas where newer construction faces stricter wind-load requirements.

To identify your exact model, check the hinge-side jamb label for the 8-10 digit SKU and the manufacture date code. The first three digits indicate the door family; the suffix tells us the frame depth, hinge placement, and whether the unit was factory-prepped for a multi-point lock. This matters because Therma-Tru changed their standard frame depth from 4-9/16″ to 5-1/4″ on many Impact-Rated units after 2020, and mixing old and new specs in the same rough opening creates a 3/8″ gap that shows up as an air leak the first cold front.

We source OEM Therma-Tru components direct from distribution, but for certain hardware sets we also spec Truth Hardware and Hoppe equivalents that meet the same cycle-test standards at lower cost. The decision depends on whether your original part carries a finish warranty we need to preserve. Sightline Windows & Doors Sunrise is an independent service provider, not affiliated with Therma-Tru.

Signs Your Therma-Tru Door Installation Is Failing

• The door drags at the bottom corner. This usually means the composite sill cap has compressed or cracked, allowing the adjustable threshold to drop. In Sunrise, we see this accelerated by the combination of summer humidity swelling the jamb and winter dry spells shrinking the fiberglass skin, which cycles the sill twice as hard as in a stable climate.
• Multi-point lock bolts don’t retract smoothly. The lock mechanism itself is rarely the problem; it’s the shootbolt alignment shifting as the frame settles. Therma-Tru’s adjustable keepers solve this if caught early, but once the frame has racked more than 1/8″, the keeper slots wallow out and need replacement.
• Daylight visible around the weatherstrip. Q-Lon and bulb-style seals on Therma-Tru units have a 7-10 year service life in South Florida UV. When they harden, the magnetic contact strip in the meeting stile loses its seal, and the air gap becomes measurable on a blower door test.
• Fiberglass skin bubbles or cracks near the lock stile. This indicates moisture migration through a compromised corner seal, usually at the intersection of the sill and the jamb. The core is still intact, but the cosmetic damage is the first visible sign of a path that will reach the lock block if ignored.
• Condensation between the door glass and the storm panel. On Therma-Tru units with factory glazing, the spacer system has failed. This is not a door replacement issue, but it requires removing the lite frame without damaging the fiberglass skin, a procedure most homeowners underestimate.

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Replacement Cost & What’s Included

What moves a job toward the top of the range: rough opening out of square more than 1/4″, rot in the subsill (common in Sunrise homes with original 1980s construction), or code-triggered upgrades like impact-rated conversion where the existing frame can’t be reused. Every quote we write in Sunrise is the measured survey document itself; the price on that paper is the price on the invoice. Haven Clause 1.

Our 365-Day Done Right Promise covers the installation, the hardware set, and the weatherstrip system. If the door doesn’t operate the way it did on day one, we return and correct it. The Therma-Tru product warranty on the fiberglass skin and the glass unit runs 10 years from manufacture; we register that for you and keep the documentation in your file.

DIY or Call Us?

There is one thing a homeowner can safely check: whether the door is binding because the hinges are loose. A #3 Phillips driver, 10 minutes, and a helper to hold the weight while you reset the screws. If that solves it, you’ve saved a service call.

Everything else on a Therma-Tru unit involves risks that accumulate fast. The multi-point lock mechanism is under spring tension; releasing it without supporting the bolt carriage can snap the internal linkage. The composite sill system looks like wood but is engineered with specific crush tolerances; a circular saw or reciprocating blade at the wrong angle voids the product warranty and creates a water path you won’t find until the subfloor is damaged. And any work on an impact-rated unit requires documentation of the fastener pattern and the sealant bed for the HVHZ certificate to remain valid; an inspector in Sunrise will ask for that paperwork.

We carry Therma-Tru-compatible sills, locksets, and weatherstrip on our trucks. If your door is failing, call (754) 254-5294 and we’ll schedule a measured survey. You’ll keep the document, and the written price won’t change.

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