Interior Installation Services
Professional Interior Door Replacement for Every Room in Your Home
Prehung or slab, hollow core or solid core, standard swing or barn door — NorTech installs interior doors that hang level, swing clean, and latch correctly with a 1-year labor warranty on every job.
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What We Handle
Door Replacement & Door Repair
Full door replacement when the door or frame has failed, or targeted repairs when only specific components need attention. NorTech handles both under the same labor warranty.
Door Replacement
Complete door replacement — old door removed, new door hung level and plumb, hardware installed, and operation tested before we leave.
- Prehung door installation with new frame
- Slab door installation into existing frame
- Hollow core and solid core door replacement
- Barn door and sliding door hardware installation
- Bifold door replacement
- French door installation
- Knob, lever, and deadbolt hardware installation
- Old door and frame removal and disposal
Door Repair
Sticking, dragging, squeaking, or improperly latching doors repaired without full replacement when the door itself is still in good condition.
- Sticking and binding door adjustment
- Hinge repair and tightening
- Strike plate realignment
- Door bottom seal and sweep replacement
- Door frame and jamb repair
- Damaged door skin and panel repair
- Lock and latch mechanism repair
- Squeaking door diagnosis and correction
Door Options
Interior Door Types NorTech Installs
Not all interior doors are the same. The right door for a bedroom is different from what works in a bathroom, closet, or open floor plan. Here’s what NorTech installs and what each type is best suited for.
Prehung Doors
A complete unit — door panel, hinges, and frame — installed together as one piece. The right choice when the existing door frame is damaged, out of square, or being replaced entirely. More labor-intensive to install but results in a perfectly fitted, plumb door opening.
Slab Doors
The door panel only — installed into an existing frame that is still in good condition. Faster and more affordable than prehung when the frame is square and solid. Requires the new slab to be mortised for hinges and bored for hardware if not pre-drilled.
Hollow Core Doors
The standard in residential construction — lightweight, affordable, and suitable for most interior applications. Not effective at blocking sound, which is the main trade-off. A reasonable choice for closets, laundry rooms, and low-traffic areas.
Solid Core Doors
A wood composite or solid wood interior provides significantly better sound blocking, a more substantial feel underfoot, and greater durability than hollow core. The preferred choice for bedrooms, home offices, and any space where privacy or quiet matters.
Barn Doors
Sliding barn doors mounted on a wall-mounted track — a popular design choice where swing clearance is limited or a statement door is desired. Installation requires a solid structural wall for track mounting and enough clear wall space beside the opening to accommodate the door panel when open.
Bifold & French Doors
Bifold doors fold in on themselves — common for closets and laundry areas where a swing door would be impractical. French doors are double-panel swing doors that create a wide, open transition between rooms. Both require precise alignment for proper operation.
Pricing Transparency
What Affects Interior Door Replacement Cost
Interior door replacement cost is not one flat number — it depends on several factors that NorTech assesses before providing your upfront estimate. Here’s what determines the final price.
Prehung vs Slab
Prehung installations take more time and labor than slab replacements because the entire frame must be removed and the new unit shimmed and set plumb. Slab installs into an existing frame are faster and more affordable when the frame is in good shape.
Door Material
Hollow core doors cost less than solid core, and solid wood doors cost more than wood composite. The door material you supply — or that NorTech sources — directly affects the material portion of the project cost.
Frame Condition
If the existing door frame is damaged, water-stained, or out of square, additional work is required before the new door can be hung correctly. Frame repair or replacement adds to the labor scope and is assessed during the estimate.
Hardware Inclusion
Door knobs, lever sets, hinges, and deadbolts add to the project cost when supplied by NorTech. If you supply your own hardware, labor to install it is still included but material cost is reduced.
Number of Doors
Multi-door appointments are more efficient per door — setup, tool staging, and travel time is shared across the job. Replacing four doors in one visit costs less per door than scheduling four separate single-door appointments.
Door Size & Style
Standard 80-inch doors are the most straightforward to install. Taller doors, wider openings, barn door hardware systems, and French door sets require additional time and may involve structural assessment before the install begins.
Diagnose the Issue
Common Interior Door Problems That Need Attention
Most door problems are either installation errors or signs of structural movement in the home. These are the most common issues NorTech diagnoses and corrects.
Door Sticks or Binds
A door that sticks seasonally is usually responding to humidity and wood expansion — often correctable with a minor adjustment or light planing. A door that sticks year-round or has never worked properly is a sign the frame is out of square or the door was hung incorrectly.
Door Won’t Latch
When the door panel and the strike plate don’t align, the latch bolt can’t engage. This is usually caused by the door or frame shifting over time. Repositioning the strike plate or adjusting the hinges brings them back into alignment without replacing the door.
Visible Gap at Frame
A door with inconsistent gaps around the perimeter — too tight on one side and too loose on the other — was either hung out of plumb or the frame has racked. Small gaps are corrected with hinge adjustment. Large or uneven gaps may require a new prehung unit.
Squeaking Hinges
Squeaking is almost always a hinge issue — either friction from dry metal contact or a bent hinge pin causing binding. In most cases this is resolved without any parts. Persistent squeaking after lubrication indicates a hinge that needs to be replaced or reset.
Door Swings Open or Closed on Its Own
A door that won’t stay in position is out of plumb — the frame is leaning slightly and gravity is doing the rest. The fix is adjusting the hinge position to compensate for the lean, or in more severe cases, replacing the frame to bring the opening back to plumb.
Damaged Door Panel
Holes, deep dents, split panels, and broken door skins are not repairable to a clean finish in most cases. A slab replacement into the existing frame is often the most cost-effective solution — the frame stays, and only the door panel is replaced.
Customer Feedback
What Homeowners Are Saying About NorTech Door Work
Reviews from customers across our interior door replacement and repair service territory.
Five interior doors replaced in one afternoon. Every door swings smoothly, latches on the first try, and the reveals are consistent on all sides. Exactly what I was hoping for — no adjustments needed afterward.
Barn door installed in the hallway between the kitchen and dining area. Track is level, the door slides quietly, and the floor guide keeps it from swinging out. Much better execution than I expected for this type of install.
Had a door that wouldn’t latch — the strike plate was completely misaligned from years of the frame settling. NorTech relocated the strike plate and adjusted two hinges. Door works perfectly now and they didn’t try to upsell me on a full replacement I didn’t need.
Replaced hollow core bedroom doors with solid core throughout the whole house. The difference in sound is significant — I didn’t realize how much noise was passing through the old doors until these were in. Worth every dollar.
French doors between the living room and home office. The alignment on double doors is tricky — both panels meet evenly in the middle, the gap is consistent, and both latch without any force. Clean install.
Prehung door replacement on the master bedroom — the old frame was completely out of square. They shimmed the new unit plumb, cased it out cleanly, and installed the hardware in one visit. Would have been a nightmare DIY project.
Common Questions
Interior Door Replacement — Frequently Asked Questions
Questions customers ask before booking interior door replacement or repair with NorTech.
Interior door replacement costs vary based on door type, whether you choose prehung or slab, the condition of the existing frame, and whether hardware is included. NorTech provides upfront estimates before any work begins. Request a free quote for a project-specific price.
A prehung door comes with the door already mounted in a new frame — the entire unit is installed together, including the jamb and stop. A slab door is just the door panel itself, installed into an existing frame. Prehung doors are used when the existing frame is damaged or out of square. Slab doors are used when the frame is in good condition and only the door panel needs replacement.
Yes. Old door removal is included in the installation scope. For prehung replacements, the existing door and frame are removed completely. For slab replacements, the existing door panel is removed while the frame is kept in place.
Yes. Door hardware installation — knobs, levers, deadbolts, and hinges — can be included in the same appointment. If you supply your own hardware or have a preference, let us know when booking. NorTech also carries common hardware on the truck for standard installations.
A single interior door replacement typically takes one to two hours. Multiple door replacements in the same appointment are more efficient — most homeowners handle two to four doors in a single visit. Your technician will confirm timing based on the number of doors and type of installation.
Yes. NorTech installs barn door hardware systems including track mounting, door hanging, and floor guide installation. Barn door installation requires a solid wall structure for track mounting and sufficient clearance on the wall beside the opening. We assess both during the estimate.
Hollow core doors have a cardboard honeycomb interior and are significantly lighter and less expensive — standard in most residential construction. Solid core doors have a wood composite or solid wood interior, providing better sound blocking, a more substantial feel, and better durability. Solid core is recommended for bedrooms, home offices, and any space where sound privacy matters.
Yes. All NorTech interior door replacement labor is covered by a 1-year labor warranty. If any installation we performed fails due to workmanship within one year of service, we return and correct it at no charge.
Service Territory
Interior Door Replacement Services Near You
NorTech door installers are active across hundreds of markets nationwide. Confirm availability at your address on our service territory page.
Get Started Today
Ready to Replace or Repair Your Interior Doors?
NorTech provides upfront estimates with no obligation. Most single-door replacements are completed in under two hours — get on the schedule today.
