Interior Installation Services
Professional Interior Trim & Molding Installation — Tight Miters, Clean Joints, Ready to Paint
Crown molding, baseboards, door casing, chair rail, and window trim installed with precision cuts and caulked finishes — NorTech trim installers back every job with a 1-year labor warranty.
Request a Free QuoteLimited Offer
15% Off Your First Trim & Molding Installation
New customers save 15% on their first NorTech trim installation appointment. Apply at checkout or mention the code when you call.
Claim Discount →
What We Handle
Trim Installation & Trim Repair
New trim installed throughout your home, or damaged and failing trim repaired and replaced without touching what’s still in good shape. Both services under the same labor warranty.
Trim Installation
All interior trim types installed with precision cuts, properly nailed into studs and blocking, and finished paint-ready.
- Crown molding installation
- Baseboard installation and replacement
- Door casing installation
- Window casing and apron installation
- Chair rail installation
- Picture rail installation
- Shoe molding and base cap installation
- Transition and threshold molding installation
Trim Repair & Replacement
Cracked, separating, water-damaged, or missing trim repaired or replaced to match existing profiles without full room re-trim.
- Crown molding gap repair and re-nailing
- Baseboard replacement — damaged sections
- Door casing re-installation after door replacement
- Corner joint repair — inside and outside
- Water-damaged trim removal and replacement
- Profile matching on older homes
- Re-caulking at wall and ceiling transitions
- Nail hole filling and surface prep
Trim Types
Interior Trim & Molding Types NorTech Installs
Interior trim is one of the most detail-dependent trades in finish carpentry. Each type serves a specific purpose — aesthetic, functional, or both — and requires different cutting and nailing technique.
Crown Molding
Installed at the junction of wall and ceiling, crown molding is the most architecturally significant trim in a room. Spring angle, ceiling angle, and wall angle must all be calculated correctly for corners to close tight. NorTech cuts crown molding flat on the saw — never tilted at compound angles — for the most accurate results.
Baseboard
The trim at the base of every wall — the most installed trim type in any home. Baseboard must be scribed to uneven floors, mitered at outside corners, and coped at inside corners. New baseboard installation is almost always triggered by flooring replacement or a whole-home renovation sequence.
Door Casing
The trim frame around every interior door opening — two vertical side casings and one horizontal head casing joined at the top corners. Proper reveal spacing and square miter cuts at the corners are what separate professional casing from amateur work. Door casing is typically replaced whenever a door is replaced.
Window Casing & Apron
Window trim frames the window opening on the interior — side casings, head casing, stool, and apron. The stool (the flat horizontal piece at the bottom) and apron (the trim below the stool) are the most commonly damaged window trim components and the most frequently replaced.
Chair Rail
Horizontal trim installed at approximately 32 to 36 inches — originally designed to protect walls from chair backs, now used primarily as a design element dividing wall treatments. Chair rail must be installed dead level regardless of floor variations. It’s also the defining top edge of wainscoting in most applications.
Shoe Molding & Base Cap
Shoe molding runs at the base of the baseboard against the floor — it covers the expansion gap in hardwood and LVP installations and hides imperfect floor-to-wall transitions. Base cap runs along the top of the baseboard against the wall and adds a finished profile to flat baseboard installations.
Where It Matters Most
Where Interior Trim Makes the Biggest Visual Impact
Trim is the detail work that finishes a room. In some spaces it’s purely functional — in others it’s the defining architectural element. These are the applications where professional trim installation returns the most visible value.
Living & Dining Rooms
Crown molding in open living and dining areas is the single highest-impact trim upgrade in most homes. The profile scale should be proportional to ceiling height — larger rooms with higher ceilings handle more complex, multi-piece crowns.
After Flooring Installation
New flooring requires new baseboard and shoe molding to complete the installation. Baseboard installed after flooring sits on top of the floor material — it must be scribed to any variations in the floor surface and coped correctly at every inside corner.
After Door Replacement
Replacing an interior door almost always requires new door casing — old casing rarely survives removal intact or matches the new door profile. NorTech installs door casing as a natural companion service to door replacement in the same appointment.
Primary Bedrooms
Crown molding in the primary bedroom is one of the most requested bedroom upgrades. Combined with a feature wall — wainscoting or an accent wall — a properly trimmed bedroom feels architecturally complete in a way that paint alone cannot achieve.
Hallways & Staircases
Baseboard and casing in hallways and on staircases are among the most visible trim in a home because they’re viewed at close range constantly. Tight corners, level chair rail, and consistent reveals make these areas look finished — loose joints and gaps make them look neglected.
Home Offices & Libraries
Picture rail, crown molding, and built-up base profiles give home offices and libraries a finished, purposeful character. These are spaces where architectural detail signals permanence — trim is the most direct way to establish that quality.
Diagnose the Issue
Common Trim Problems That Need Professional Repair
Most trim failures are visible immediately — gaps, split corners, and sagging sections that signal either poor installation technique or seasonal movement that wasn’t accounted for. These are the most common issues NorTech repairs.
Crown Molding Gaps at Ceiling
A gap between the top of the crown molding and the ceiling is usually caused by the molding pulling away from the wall or ceiling as the framing above dries and moves. Small gaps are caulked and painted. Large or recurring gaps indicate the molding was not nailed into the top plate correctly and needs to be re-secured.
Open or Cracked Corner Joints
Butt-cut inside corners open as wood moves seasonally — this is why inside corners should be coped, not mitered. A properly coped joint stays tight because only one piece is cut to the profile of the other. Open mitered inside corners require re-cutting the second piece as a cope.
Baseboard Gaps at the Floor
Baseboard that doesn’t sit flush against the floor has not been scribed to the floor contour. This is either a dip in the floor surface or a baseboard that was cut too short to reach. The fix is scribing the bottom edge of the baseboard to follow the floor variation — not filling the gap with caulk.
Door Casing Not Flush
Casing that stands proud of the wall surface or dips behind it is a shimming issue in the door installation, not a casing problem. The door jamb is not flush with the wall surface, so the casing bridges the gap. Correcting this requires either shimming the jamb or scribing the casing.
Water-Stained or Swollen Trim
MDF trim that has been exposed to moisture swells at the bottom edge and loses its profile detail. Swollen MDF cannot be repaired — the affected sections must be removed and replaced. PVC or solid wood trim is recommended in areas with any moisture exposure.
Painted-Over Caulk Cracking
Caulk that cracks through the paint at trim transitions is using the wrong caulk product — oil-based caulk under latex paint, or caulk applied too thick in a single pass. The failed caulk must be removed, the joint cleaned, and re-caulked with paintable latex caulk in thin applications.
Customer Feedback
What Homeowners Are Saying About NorTech Trim Work
Reviews from customers across our interior trim and molding installation service territory.
Crown molding throughout the main floor. Every inside corner is coped — I checked specifically because previous installers had mitered them and they were gapping within months. NorTech’s joints are still tight a year later. That’s the difference.
Baseboard and door casing throughout the house after new LVP flooring was installed. The baseboard is scribed to the floor in every room — there are no gaps underneath anywhere. Clean work on a big scope of project.
Had crown molding repaired in the dining room — a section had pulled away from the ceiling after the previous owners had installed it into drywall without hitting the top plate. NorTech relocated the nailing into the plate and the section is now solid.
Door casing replaced on eight doors after we replaced all the interior doors. The reveals are consistent on every door — same spacing on both sides, same head reveal. That kind of consistency is what I was looking for and didn’t find with the first contractor we tried.
Chair rail installed in the dining room and hallway. Level all the way around both spaces and the inside corners are coped. The chair rail sits flush against the wall — no gaps, no visible shimming. Exactly what you want from this type of work.
Baseboard in an older home with a custom profile. NorTech sourced matching material before the appointment — I didn’t have to track it down myself. The new sections blend into the existing trim and you can’t see the transitions.
Common Questions
Interior Trim & Molding — Frequently Asked Questions
Questions customers ask before booking trim installation or repair with NorTech.
Crown molding installation costs vary based on profile complexity, linear footage, ceiling height, and room layout. NorTech provides upfront estimates before any work begins. Request a free quote for a project-specific price.
Yes. NorTech installs all interior trim types — crown molding, baseboard, door casing, window casing, chair rail, picture rail, and transition molding. Multiple trim types can be installed in the same appointment, which is more efficient than scheduling separate visits.
Yes. NorTech installs trim to a ready-to-paint finish — nail holes filled, caulk applied at all wall transitions and joints, and surfaces sanded smooth. Painting is typically done by the homeowner or a painter after installation. NorTech does not include painting unless specifically scoped as part of the project.
Inside corners are coped — one piece is cut square and the second piece is back-cut to follow the profile of the first, creating a joint that stays tight as the wood moves. Outside corners are mitered. NorTech does not use caulk as a substitute for proper joinery — corners are cut to fit.
A single room of crown molding typically takes two to four hours depending on room size and number of corners. Full-house baseboard installation may take one to two days. Combining multiple trim types in one appointment is more efficient — your technician will provide a timeline based on the scope.
In most cases yes. NorTech technicians identify standard profiles and source matching material before the appointment. Older homes may have custom or discontinued profiles that require routing to match — this is assessed during the estimate and factored into the quote.
Crown molding cracks and separates primarily due to seasonal wood movement, improper nailing that doesn’t reach studs or the top plate, or caulk that has dried out and lost adhesion. Small gaps between the molding and wall or ceiling are normal in wood trim and are addressed with paintable caulk — but recurring or widening gaps usually indicate a nailing or installation issue.
Yes. All NorTech interior trim and molding installation 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 Trim & Molding Installation Services Near You
NorTech trim installers are active across hundreds of markets nationwide. Confirm availability at your address on our service territory page.
Get Started Today
Ready to Install or Repair Your Interior Trim?
NorTech provides upfront estimates with no obligation. Crown molding, baseboard, casing, and chair rail — get all your trim work done in coordinated visits.
