Therma-Tru Door Installation Nationwide

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

Therma-Tru door installation in Jacksonville typically runs $1,150 to $3,400 installed, depending on whether we’re replacing a failed component or setting a complete pre-hung unit. Most slab replacements and hinge-to-hinge swaps are done in one visit. The way homeowners usually find us: a door that won’t latch, a sweep dragging across the tile, or a corner seal that’s been leaking air since Hurricane season ended.

Call (904) 513-9670

Key Takeaways

• We stock Therma-Tru-compatible hinges, sweeps, weatherstripping, and threshold caps on our service trucks.
• Written price before any work starts. No change orders at the door.
• 365-Day Done Right Promise covers every Therma-Tru installation we perform.
• Meridian Windows and Doors Jacksonville is an independent installer, not affiliated with Therma-Tru.

Which Therma-Tru Models This Applies To

We install and service the full Therma-Tru line we see across Jacksonville: Classic-Craft, Fiber-Classic, Smooth-Star, Pulse, and Benchmark entry systems. The part that matters isn’t the model name, though – it’s the door’s handing, slab thickness, and hinge prep pattern. Therma-Tru uses a proprietary fiberglass skin bonded to a polyurethane core, and the slab thickness is almost always 1-3/4 inches. That’s the same as a standard interior door, but the hinge prep is where owners get tripped up. Therma-Tru routes hinges for 4-1/2-inch radius-corner hardware, not the square-corner hinges you’ll find on off-the-shelf slabs at the big box stores.

For OEM versus aftermarket: for seals, sweeps, and threshold caps, quality aftermarket equivalents from companies like Endura and MD Building Products fit well and hold up. For the slab itself or the frame, we recommend genuine Therma-Tru components. The fiberglass skin thickness and core density are spec’d to match, and a mismatched slab will telegraph through the paint line within a year. If you’re unsure what you have, check the hinge edge of the door. Therma-Tru stamps a manufacturing code there, and we can cross-reference it when we arrive.

Signs Your Therma-Tru Door Installation Is Failing

• The door won’t latch without a shove. This is almost always a hinge that’s worked loose from the jamb or a slab that’s settled. In Jacksonville’s humidity, wood jambs swell and contract seasonally, and hinge screws slowly lose their bite.
• Daylight is visible around the corners. The compression weatherstripping Therma-Tru uses degrades faster in direct sun exposure. South-facing entries in Mandarin and Julington Creek show this first, usually around year four or five.
• The bottom sweep drags or leaves a gap. A worn sweep lets conditioned air escape and lets sand and pine needles in. If the sweep is dragging, the threshold cap underneath may have shifted or the slab has settled enough that the reveal changed.
• The door sticks at the top corner. On fiberglass slabs, this usually means the frame has racked. Jacksonville homes built on slab-on-grade foundations shift, and a door frame that’s a quarter-degree out of square binds at the head.
• Condensation or fogging on the glass lite. If you have a decorative glass insert and the seal between the panes has failed, that’s a Therma-Tru glass cartridge replacement, not a full door swap. We stock common cartridge sizes and can order the rest.

Replacement Cost & What’s Included

Here’s what Jacksonville homeowners can expect to pay, installed, from a contractor who writes the price down before work starts:

• Door sweep or weatherstripping replacement: $95 – $220 installed. We carry common sizes on the truck.
• Threshold cap or sill replacement: $180 – $420 installed, depending on width and whether the sub-sill needs reshimming.
• Hinge replacement and re-hanging existing slab: $220 – $480 installed. Includes resetting the jamb if needed.
• Full slab replacement (new Therma-Tru door on existing frame): $850 – $1,800 installed. Price depends on the series, glass lite, and finish.
• Complete pre-hung Therma-Tru entry system replacement: $2,200 – $3,400 installed. This includes the frame, threshold, weatherseal, hardware prep, and disposal of the old unit.

What drives the range: the door series, whether there’s decorative glass, what condition the existing frame is in, and how much rot repair (if any) we find when the old door comes out. That last one is where other contractors add a change order at the door. We won’t. If we quote a slab swap and discover sub-sill rot, we’ll photograph it, explain it, and quote the repair in writing before we touch a single screw.

Every Therma-Tru installation we perform is covered by our 365-Day Done Right Promise. If the door binds, the sweep fails, or the weatherseal delaminates within a year, we return at no charge. That’s in writing.

DIY or Call Us?

Some things are genuinely safe to check yourself: is the strike plate loose? Does the threshold cap have visible screws that just need a half-turn? Is the sweep held on with a couple of accessible screws? Those checks take ten minutes and might save you a service call. But once you’re pulling the hinges off the jamb or shimming a frame, you’re into territory where a small mistake compounds. A slab that’s sprung half a degree will eventually crack the frame or delaminate the hinge area, and that turns a $300 job into a $1,800 one. My rule is simple: measure twice, quote once – everything after that is just showing up. If you’re not sure what you’re looking at, call us at (904) 513-9670 and we’ll walk you through it before anyone even schedules a visit.

FAQs