Interior Door Replacement
A door that binds every August usually isn’t a bad door — it’s an opening that moved. Replacing interior doors here starts with reading the jamb and the floor, not the catalogue.
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Overview
Interior Door Replacement
There are two ways to replace an interior door, and they cost very different amounts. Hanging a new slab in the jamb that’s already there keeps your casing, your paint and your trim work intact, and it’s the right move when the jamb is straight and plumb. A prehung unit brings a new jamb with the door already fitted to it, which fixes a racked or damaged opening but means pulling casing, re-shimming, and repairing and repainting trim afterward.
Which one applies is a measurement, not a preference. Across this region, clay soil movement racks openings out of plumb over time, and the tell is right in front of you: a door that rubs at one top corner, a latch that misses its strike, a reveal gap that tapers from an eighth of an inch to nothing. Drop a new slab into an opening like that and it will bind exactly the same way, because the geometry never changed.
Once the opening is settled, the upgrade itself is about mass and operation. Hollow-core doors are light, cheap, and transmit almost every sound in the house. Solid-core doors feel different in the hand and cut noticeably more noise, which is the main reason to spend money on a primary bedroom, a bathroom, or a room where somebody takes calls. Pocket doors, bypass sliders and double doors solve floor-space problems that a swinging door creates.
The things that actually decide this job
Slab or prehung is decided at the opening
Check three things. Are the reveal gaps around the closed door even from top to bottom? Does the latch land square in the strike without lifting the door? Is the hinge jamb plumb on a four-foot level? If all three pass, a new slab mortised to the existing hinges and bored to the existing hardware is the efficient choice. If the jamb is racked, split, water-damaged at the bottom, or was never plumb, a prehung unit is the only repair that actually holds.
Solid core is the sound upgrade
Mass blocks sound, and a hollow-core door has almost none — two thin skins over a cardboard grid. A solid-core door the same size can weigh several times as much and makes an obvious difference to voices, television and hallway traffic. It needs three hinges rather than two and a jamb solid enough to carry it. Pair it with a bottom sweep and perimeter gasketing, because the gap around a door leaks far more sound than the panel itself does.
Hardware has to match the bore, not the brand
Existing doors carry specific dimensions: a bore hole normally 2 1/8 inches, a backset of either 2 3/8 or 2 3/4 inches from edge to bore centre, a latch face that’s square or radiused, and hinges of a set size with square corners or a 1/4 or 5/8 inch radius. Reusing your existing levers and strikes means matching all of that. Mixing them costs you a filled and repainted hole in a brand new door, which never quite disappears.
Size, swing and clearance are part of the spec
Interior doors run in standard widths from 24 up to 36 inches, and swing direction decides whether a door blocks a light switch, collides with a vanity, or traps somebody behind it in a small bathroom. If accessibility matters now or later, a 32-inch clear opening is the number worth targeting, which usually means a 34 or 36 inch door. Changing width means changing the header and framing, so that is a carpentry decision made before anything is ordered.
Practical considerations
Doors and the return-air path
Most homes here have supply registers in every room and only one or two central returns. Air pushed into a bedroom has to get back out, and it does that under the door. Cut the undercut too tight — or add thick flooring beneath an existing door — and that room runs warm, the door slams in the draft, and the system works harder. If you want tight, quiet doors for sound, plan the air path deliberately with a transfer grille or a jump duct rather than just choking it off.
Out-of-plumb openings have a repair order
When an opening has racked, the fix is not to shave the latch edge until the door closes — that leaves a wedge-shaped gap you’ll look at every day. The order is: reset or shim the hinge jamb back toward plumb, move the strike plate, then trim the head or top corner where the geometry demands it. If the jamb itself is twisted or the header has dropped, replacing the unit is the honest answer, and it tells you something about the house worth watching.
New flooring changes every door
Adding tile, engineered wood or a floating floor over an existing slab raises the finished floor, often three-quarters of an inch or more with underlayment. Every interior door in the affected area then drags or won’t close. That’s a straightforward trim of the bottom rail on most doors, but hollow-core doors have limited solid material down there, and there is a point past which you cut into the void. If flooring and doors are both on the list, sequence the flooring first.
The garage door is not an interior door
The door between an attached garage and the house is treated by current codes as a rated, self-closing assembly — typically solid wood, solid or honeycomb-core steel, or a 20-minute rated door, with self-closing hardware and a proper seal. It is not a place to install a nice hollow-core panel door because it matches the hallway. The requirement is enforced by the authority covering your address, which in this metro may be a city, an unincorporated county area or a township, so it gets confirmed rather than assumed.
At a glance
| Door type | Where it fits | Trade-off |
|---|---|---|
| Hollow-core molded or flush | Closets, pantries, secondary rooms on a tight budget | Light and inexpensive; almost no sound blocking, and a hard knock can punch through the skin |
| Solid-core molded or flush | Primary bedrooms, bathrooms, offices, media rooms | Clearly quieter and feels substantial; needs three hinges and a jamb able to carry the weight |
| Solid wood stile-and-rail | Stain-grade work and statement openings | Best look and feel by a distance; moves seasonally, so reveals get set with that in mind |
| Pocket door | Small bathrooms and closets where a swing steals usable floor | Needs an open wall cavity with no wiring or plumbing in it; seals poorly, so sound and light pass |
| Barn or bypass slider | Pantries, laundry, offices where two swings collide | Mounts on a finished wall with no framing surgery; blocks the wall it parks against and never seals |
| Garage-to-house door | The single opening between an attached garage and living space | Governed as a rated, self-closing assembly by current code — confirm the requirement for your address |
Common questions
My doors stick in summer and swing loose in winter. Will new doors fix it?
Usually not, because the door isn’t what changed. Soil under this region swells in wet periods and shrinks in dry ones, and the structure follows, which racks openings a small amount seasonally. New slabs hung in those same openings inherit the same problem. The right first step is adjustment: shimming behind a hinge leaf, resetting the strike, occasionally easing a top corner. Then watch the doors across a full wet and dry cycle. If the movement is large or getting worse, that’s information about the slab, and it deserves attention before you spend money on doors.
Should I buy slabs or prehung units?
Slabs are cheaper in both material and labour, and they leave your casing and trim paint untouched — ideal when the existing jambs are plumb and undamaged and you simply want a better door. Prehung units cost more and bring a trim-and-paint job with them, but they replace the whole assembly including the jamb, so they’re the correct answer for racked openings, water-damaged jamb legs, changed door widths, or a swing you want reversed. In many houses the honest recommendation is mixed: slabs through the good openings, prehungs where the jambs have failed.
Are solid-core doors worth the extra money?
For rooms where sound matters, yes, and it’s one of the few upgrades people notice every day. The panel change alone makes a clear difference to speech and TV noise. But the door is only part of the leak — the perimeter gap and the undercut at the floor pass a lot of sound, so a solid-core door with gasketing and a sweep performs far better than a solid-core door hung with ordinary gaps. For closets and pantries, hollow-core is fine and the money is better spent elsewhere in the house.
Do I need a permit to replace interior doors?
Like-for-like replacement generally doesn’t. Widening an opening does, because that means cutting framing and installing or resizing a header, which is structural. Adding a pocket door into an existing wall can involve framing plus whatever wiring or plumbing turns up in the cavity. And the garage-to-house door carries its own code requirements. Permit authority follows the property address rather than the mailing city — parts of this metro are unincorporated county, one is a township — so we confirm the jurisdiction for your address instead of guessing. Call (832) 513-5639 if you’re unsure which category your project falls into.
Can you match my existing doors if I only replace some?
Often, with two caveats. Molded panel doors are made in specific panel layouts and edge profiles that change over the years, so a discontinued pattern may only have a near match — noticeable if the new and old doors face each other across a hallway. And a brand new door beside fifteen-year-old painted doors will show a difference in white and sheen even when the profile matches perfectly. What people are usually happiest with is replacing a full sightline — every door visible from one hallway — and painting them together.
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