Buffalo Grove Carpentry Company
(847) 242-8940
Crown Molding Installation in Buffalo Grove, IL
Crown molding is one of those details that most people only notice when it is done well. It pulls a room together, adds height, and gives a space a finished, intentional look that plain walls and ceilings simply cannot achieve. Buffalo Grove Carpentry installs crown molding for homeowners throughout Buffalo Grove and the northwest suburbs. Whether you want a simple profile in a single room or detailed millwork throughout your home, we measure, cut, and install it cleanly so the joints are tight and the lines are straight.
What Crown Molding Installation Involves
Crown molding sits at the junction between the wall and the ceiling. Installing it correctly requires precise angle cuts, called copes and miters, that account for corners that are rarely perfectly square.
In older homes especially, walls and ceilings are often not at a true 90 degree angle, which means every cut has to be adjusted to fit the actual conditions of the room rather than what a textbook says they should be.
The process starts with measuring the room and calculating the cuts. Each piece is cut to length and angle, test fit, adjusted if needed, then nailed and filled. Joints between pieces are coped rather than mitered on inside corners to allow for wood movement and produce tighter, longer-lasting seams.
After installation, nail holes and gaps are filled, sanded, and left ready for paint.
We work with all common crown molding profiles including colonial, craftsman, cove, dentil, and egg-and-dart.
For homes with existing molding that needs to be extended or matched, we source profiles that fit or adapt the installation to blend cleanly with what is already there.

When You Need Crown Molding Installation
Crown molding is worth installing or replacing in a few common situations:
- You are renovating a room and want to give it a more finished, upscale look
- The existing molding is damaged, cracked, or separating from the wall or ceiling
- You are selling the home and want to improve the impression it makes
- Rooms in your home have molding but one or two do not, and the inconsistency bothers you
- You have just had the ceilings repainted and the old caulk lines look worse than before
In Buffalo Grove homes from the 1970s and 1980s, crown molding was often skipped entirely or installed with minimal profiles. Upgrading it is one of the more noticeable improvements you can make to a room without touching the walls, floors, or furniture.
Why Crown Molding Problems Happen
Poorly installed crown molding fails in predictable ways. The most common issues are gaps at the corners, separating seams along the ceiling or wall line, and sections that pull away over time.
Gaps at corners usually mean the cuts were not precise enough or the corners were assumed to be square when they were not. In a house that has settled over decades, almost no corner is a true 90 degrees.
Separating seams along the ceiling happen when the molding was nailed only to the wall and not to the ceiling framing, or when the wood was not properly acclimated before installation and expanded or contracted after it went up.
Pulling away from the wall is often a sign that the molding was not nailed into solid backing. Drywall alone will not hold crown molding long term. Nails need to hit the top plate of the wall or blocking installed for that purpose.
These are fixable problems, but they are easier to avoid with a proper installation in the first place.
Repair vs. Replacement
Sometimes crown molding just needs attention rather than full replacement.
Repair works well when:
- Only one or two sections have gaps or damage
- The profile is still available and new pieces can be spliced in cleanly
- The molding is structurally sound but just needs recaulking and repainting
Full replacement makes more sense when:
- The existing molding is damaged along most of its length
- The profile is outdated and does not match the direction of the renovation
- The original installation was poor and the same problems keep coming back
- You want to upgrade to a larger or more detailed profile
We will take a look at what you have and give you a straight answer on which approach makes more sense for your situation.
What Affects the Cost of Crown Molding Installation
Frequently Asked Questions
How long does crown molding installation take?
A typical bedroom or living room takes half a day to a full day depending on size and complexity. Larger rooms or rooms with difficult corners take longer. We give you a realistic time estimate before we start.
Do I need to paint the molding before or after installation?
Most people prime before installation and do the finish coat after. That way you only need to cut in along the wall and ceiling lines rather than painting the entire piece by hand after it is up. We can advise on the best sequence for your situation.
Can you match the crown molding in other rooms of my house?
Yes. Matching existing profiles is something we do regularly. Bring us a sample or show us what you have and we will find a match or get as close as the available profiles allow.
Is crown molding only for formal rooms?
Not at all. It works in bedrooms, hallways, kitchens, and bathrooms just as well as living and dining rooms. The profile you choose sets the tone, a simple cove reads as clean and modern while a built-up multi-piece crown reads as traditional or formal.
Can crown molding be installed on vaulted or angled ceilings?
Yes, but it requires more planning and different cutting techniques. Vaulted ceilings use spring angle molding and the cuts are more complex. It is doable, just let us know what you are working with when you call.