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Therma-Tru Home Additions & ADU: The West Palm Beach Owner’s Guide
If you’re planning a home addition or ADU in West Palm Beach and want Therma-Tru doors and entry systems specified into the build, we install them as part of the job, straight from our documented brand roster. A full home addition here runs $45,000 to $130,000, and an ADU runs $90,000 to $220,000 depending on size, foundation work, and finish level. The Therma-Tru entry door package inside that scope typically lands between $1,500 and $6,000 installed, and it’s one of the few line items where the manufacturer’s own warranty gets handed to you in writing at close. Homeowners usually come to us because an existing addition has a Therma-Tru door that’s binding, leaking at the threshold, or failing to seal against West Palm Beach humidity, and they want to know whether to patch it or replace it before hurricane season starts getting loud.
Which Therma-Tru Models This Applies To
Therma-Tru builds fiberglass and steel entry systems across a few distinct series lines. The Classic-Craft and Pulse series are the two you’ll see most in West Palm Beach additions from the last 20 years. Classic-Craft doors run thicker and heavier, with a more traditional wood-grain profile. Pulse doors are lighter, with a smoother finish and better thermal numbers, which matters when your addition faces full western sun off Palm Beach Lakes Boulevard. To identify what you have, check the hinge-side edge of the door slab for a small Therma-Tru label with the model number printed on it. If that label is gone, measure the slab thickness: Classic-Craft runs 2-1/4 inches, Pulse runs 1-3/4 inches. That single measurement tells us 90 percent of what we need before we even roll a truck. Aftermarket parts do exist for Therma-Tru systems, thresholds and weatherstripping especially, but we default to OEM because the corner pads and adjustable sill caps are sized to the exact slab profile, and a generic substitute changes the swing clearance by just enough to cause binding six months later.
Styles & brands we work with
Signs Your Therma-Tru Home Addition or ADU Entry Is Failing
- The door binds at the top corner on the latch side. In West Palm Beach, slab movement from sandy subsoil settlement is the usual cause. The rough opening shifts, the door frame follows, and the reveal goes uneven. It’s rarely the door itself.
- You see daylight under the threshold or feel air moving at the bottom sweep. The adjustable sill cap has either compressed past its range or the threshold was never shimmed level in the first place. Wind-driven rain during summer storms finds that gap fast.
- The door won’t latch without lifting the handle. That’s the strike plate or the hinge screws backing out, and the heavier Classic-Craft slabs pull hinges hard enough to loosen screws over time. Tightening them usually buys a season, but the geometry needs correcting to fix it for good.
- You hear a hollow rattle when the door closes, or condensation between the glass panes in the sidelite. The insulated glass unit in a Therma-Tru sidelite can fail in our humidity, and once the seal is gone, you’re looking at glass replacement, not a door replacement.
- Paint or stain is blistering on the bottom six inches of the slab. Fiberglass doesn’t rot like wood, but standing water at the threshold from a clogged weep system will wick up and break the finish’s adhesion. Left alone, it gets worse every rainy season.
See the difference
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After
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AfterReplacement Cost & What’s Included
Here’s the straight number, the way Curtis Lane likes to give it. A Therma-Tru entry door replacement inside an existing West Palm Beach addition runs between $1,500 and $6,000 installed, depending on whether we’re doing a slab-only swap or a full frame-out with new sidelites and trim. A slab-only replacement on an existing frame runs $1,500 to $2,800. A full system replacement, which means tearing out the old frame, setting a new pre-hung unit, flashing it, and trimming both sides, runs $3,000 to $6,000. The range moves on slab thickness, glass package, hardware, and how much rot or settlement we find in the rough opening once the old unit is out. Every quote is written before work starts, line by line, and if we open the wall and find something that changes the number, you get a phone call before another cut is made. The work itself is covered by the 365-Day Done Right Promise, on top of the Therma-Tru manufacturer warranty we hand you at close.
DIY or Call Us?
You can safely check a few things yourself. Run your hand along the weatherstripping and see if it’s torn or compressed flat. Look at the corner pads on the hinge side and see if they’re still seated. Check the sill cap screws and see if they turn. Those are all fair game. What you should not attempt is pulling a pre-hung Therma-Tru unit out of a West Palm Beach addition wall yourself. The unit is married to the house wrap and flashing, and once you break that seal, you’ve created an opening that’ll take water the next time a storm rolls off the Atlantic. We’ve corrected enough homeowner-done tearouts to say this plainly: the demo is the expensive part to get wrong. If you’re not sure which side of that line you’re on, call (728) 203-9809 and we’ll tell you over the phone, no charge either way.
FAQs
A properly installed Therma-Tru door in West Palm Beach should last 25 to 30 years on the slab itself, and that’s a real number, not a sales pitch. The weatherstripping and threshold cap will need replaced every 5 to 8 years because our humidity and salt air break down foam and vinyl faster than inland climates. The fiberglass doesn’t care about the moisture. The seals do. Call (728) 203-9809 and we’ll quote the wear items separately from the slab, because you shouldn’t pay for a door when you only need a sweep.
Most of the time, yes. Binding doors are usually a frame alignment issue, a hinge problem, or a slab that needs its corner pads reset, and we do that kind of repair on existing West Palm Beach additions all the time. Replacement becomes the right call when the glass is blown, the slab is delaminating, or the rough opening has moved enough that the frame is no longer recoverable. A free estimate gets you the answer either way, and the price you get is the price you pay.
For a slab-only swap, we’re usually done in 3 to 4 hours on site. For a full frame-out with new sidelites and trim, it’s a day and a half to two days, because we flash the opening, set the unit, let expanding foam cure fully, and then trim both sides clean. West Palm Beach wind loading means we don’t rush the flashing, not even on a dry day. You’ll get the full written scope before we start, so there’s no question about what happens on day two.
We stock the common wear items on the truck: weatherstripping profile sets, corner pads, sill caps, and strike plate hardware. Full Therma-Tru door systems and custom glass packages get ordered by spec, which is the only honest way to do it, there’s too much variation in sizes and swing configurations to carry it all. That’s also why we don’t quote a door over the phone without knowing the slab thickness and the rough opening size. We measure first, then the written price comes.
Call (728) 203-9809 and you’ll get a live person, any hour, any day. We’ll schedule a site visit for West Palm Beach and nearby areas, measure the opening, and hand back a written line-item quote. Straight number, full scope, no surprises after the invoice. Bradford Remodeling Co West Palm Beach is an independent service provider and not affiliated with Therma-Tru, but we install and service their products along with KraftMaid cabinetry, Cambria and Silestone surfaces, and the rest of our documented brand roster.
Written by Curtis Lane, Owner, Bradford Remodeling Co – West Palm Beach at Bradford Remodeling Co West Palm Beach, serving West Palm Beach and nearby areas.
