Therma-Tru Door Installation Nationwide | Meridian Windows & Doors

Therma-Tru Door Installation: The Los Angeles Owner’s Guide

Therma-Tru door installation in Los Angeles typically runs $850 to $2,400 installed, depending on the door slab, frame condition, and whether we’re doing a slab swap or a full frame-out replacement. We stock Therma-Tru slabs and hardware on our trucks, and most single-door installations are completed in a half day. Most Los Angeles homeowners call us after the door starts dragging on the threshold, the weatherstripping has torn loose, or the slab itself has warped in the coastal humidity and no longer closes square.

Call (817) 686-2228

What we see most often: a Therma-Tru door that was installed a decade ago with a frame that was never properly flashed, and now the bottom rail is spongy and the screws holding the hinges have stripped out. That is not a door problem. That is an installation problem, and it is exactly what we correct.

Key Takeaways:

• Installed cost runs $850 to $2,400 for most Therma-Tru doors in Los Angeles
• Slab-only swaps cost less; full frame replacements with rot repair cost more
• We stock Therma-Tru slabs, hinges, sweeps, and weatherstripping on the truck
• Written price before work starts, covered by the 365-Day Done Right Promise

Which Therma-Tru Models This Applies To

We install and replace doors across the Therma-Tru lineup: the Classic-Craft and Fiber-Classic series, the Pulse and Benchmark lines, and the newer Shaker-style collections. Most Los Angeles homes built or remodeled after 2005 that specified a fiberglass entry door are running a Therma-Tru Benchmark or Fiber-Classic, and those two account for the bulk of our replacement work. The Classic-Craft series typically shows up on higher-end Spanish and Mediterranean revival homes in Hancock Park, Brentwood, and the Palisades, where the wood-grain grain depth has to match the original.

Every Therma-Tru door has a label on the hinge edge of the slab with the series name and a date code. If the label is painted over or missing, we take three measurements: the slab width and height, the hinge spacing, and the bore location for the lockset. From those three numbers we can match the exact door. Aftermarket slabs from regional suppliers rarely match the Therma-Tru grain pattern or the frame’s weatherstripping groove, and in Los Angeles, where the sun beats on west-facing entries for six hours a day, a mismatched slab will fade differently and read as a patch job within two years. We recommend OEM Therma-Tru replacements for any door that faces direct sun.

Signs Your Therma-Tru Door Installation Is Failing

• The door drags on the threshold or sticks at the top corner. This usually means the frame has settled or the hinges have loosened from the rough opening. In Los Angeles, the clay-heavy soils in the Valley expand and contract with rain, and that movement transfers straight into the door frame.
• You can see daylight around the perimeter when the door is closed. The weatherstripping has compressed or torn, and the door is no longer sealing. That gap is also where Los Angeles winter rain finds its way in, and silicone caulk will not fix a door that has moved out of plane.
• The bottom sweep is frayed or missing entirely. This is the single most common Therma-Tru part failure we replace. Once the sweep is gone, cold air and insects come in under the door, and the bottom rail starts taking on moisture every time the sprinklers hit the stoop.
• The lockset binds or the deadbolt will not throw. When the slab sags even 1/8 inch, the latch no longer aligns with the strike plate. Forcing the handle just bends the internal components, and now you have a security issue on top of an alignment issue.
• The fiberglass skin is delaminating or blistering at the bottom corners. Water has found a way into the door core. This is almost always a flashing failure on the original install, and the fix is a new slab plus new flashing tape, not a coat of paint.

Replacement Cost & What’s Included

Here is what we charge in Los Angeles, with the price written down before any work starts.

• Therma-Tru slab-only swap: $850 to $1,400 installed. This assumes the existing frame is square, structurally sound, and the hinges are in good condition.
• Full door and frame replacement: $1,600 to $2,400 installed. This includes removing the old frame down to the rough opening, re-flashing the sill and jambs, and setting the new door in place.
• Rough opening repair: $200 to $600 added when we find rot or termite damage in the framing. We show you exactly what we found before we touch it.

Every installation includes the door slab, hinges, weatherstripping, a new bottom sweep, and an adjustable threshold where the slab height allows it. The price also covers haul-away of the old door and frame. All labor is covered under the 365-Day Done Right Promise, which is written into your quote: if the installation fails within the year, we return at no charge to make it right.

DIY or Call Us?

A Therma-Tru door slab weighs 90 to 140 pounds depending on the model. The hinges are not spring-loaded, and the dangerous part is not the door falling on you. It is the moment when the slab is hanging on one hinge, the screws are half-threaded, and the frame twists because the rough opening was never shimmed properly. That is when a homeowner tears a hinge out of the jamb and turns a $1,200 swap into a $2,400 frame replacement. You can safely check the hinge screws for tightness and replace a worn bottom sweep with a screwdriver. Leave everything else to someone who has done it a few hundred times.

Elliot Vance, our owner, learned the trade at Los Angeles Trade-Technical College and has been replacing doors across the LA basin for close to two decades. His rule applies to every install we run: measure it right, seal it tight, and the door does the rest. Call (817) 686-2228 and we will get you on the schedule.

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