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Example of Expensive Crown Molding Separating at Scarf Joint

The Willits

[This is part of my How to Install Crown Molding Series.]

The Problem

Buildings are designed to expand and contract with changes in temperature and humidity. And because rooms breath over the seasons, the crown moldings — if not properly installed — will separate at the joints where two piece are spliced together.

For example, the room in the image above is the lobby of one of the most sought after addresses in Birmingham, Michigan. The moldings were all professionally installed back in 2002 when the building opened.

And yet once or twice every year, the crown moldings have to be re-caulked to hide the 1/8 inch gaps that appear at all of the splices.

crown molding scarf joint

Above  A crown molding scarf joint that’s been pushed up and over its mating piece.

Below  This scarf joint (along with all of the others in the building) was filled with caulk only four months ago and yet has already separated.

crown molding joint

Two Crown Molding Scarf Joint Tips

1. Install a three-piece crown molding instead of a single piece. Here are two posts I’ve already written that will help you get started: Why I Don’t Install One-Piece Crown Moldings and How to Install a Three-Piece Crown Molding Series.

2. Use a 45 degree miter for your scarf joint rather than a 22 degree miter. The example above shows a 22 degree miter. When glueing the two pieces together at the joint, the 45 degree miter gives you more surface area to hold the two pieces together. Also, a 45 degree scarf joint allows you to sink a few 23 gauge pins across the joint to help hold it in place.

Hope this helps you with your own crown molding installation!

Architectural Subordination

large and small moldings trim details in same room

How to create molding variety in the same room without sacrificing unity.

[This is part of my How to Install Moldings series.]

Architectural subordination infuses diversity into your decorative moldings by giving you rules that produce both harmony and variety.

Public vs Private and Utility Rooms

The molding patterns in your home should reflect differences among rooms.

Rooms can be formal or informal, public or private, and decorative or utilitarian.  A formal room used for entertaining requires more emphasis and grandeur — think “foyer” while a basement media room should be more relaxed.

This advice may contradict what you may have read or heard; there’s a common myth that your moldings should match throughout the house: same baseboard, crown molding, door and window trim in every room.

In a more subtle, classical arrangement, however, the moldings will differ from room to room, cuing visitors to the mood and function of each space.

Here is a suggested order of room subordination, starting with the most senior rooms:

Foyer, Formal Dining Room and Parlor

Since you receive and entertain guests here, the level of architectural detail should reflect your esteem for them.  The rooms can be equal in rank or subordinated to each other according to your priorities.

Guest Bedrooms, Gust Bathrooms and Hallways

While you don’t have to be showy in these secondary rooms, the moldings in these rooms should give a polite nod to your guests while they are not in your presence.

Home Office

This can be a grand room with paneled walls and a coffered ceiling, or a simple, functional space.  You’ll need to consider how you actually use the room, and whether it’s primarily public.

If you write or balance long columns of figures in solitude, you may want to omit distracting treatments.  If you meet with clients or if it’s visible to guests on the main floor, it’s better considered a public space — show off accordingly.


A kitchen is a cooking work space.  You may eat there, too.  These are potentially messy activities.

It’s strange, then, that the remodeling industry so often persuades homeowners to spend their entire remodeling budget in the kitchen.

As a result, formal dining rooms, parlors and foyers have dwindled from decorative neglect, while kitchens — where grease flies and children eat grapes off the floor — mutate into opulent, and ruinously expensive showrooms.

Remaining Bedrooms

A solid foundation molding package will work here.  Nothing trivial, mind you: big baseboards, substantial door/window trim and a simple three-piece crown molding.

Laundry And Other Utility Rooms

These rooms should be functional and easy to clean, but to preserve unity with the rest of the home, you should still upgrade the moldings.  Start with a 6″ flat-stock baseboard and a 4″ flat-stock door trim.

Master Bedroom

Do whatever you want in your master bedroom.  After all, it shouldn’t be visible from the foyer.

Example #1

The photo below shows the view of my client’s foyer from the main door.  The client choose to subordinate this first archway, which leads to the parlor; the more significant archway to the formal dining room dramatizes the transition from casual to formal.

archways interior moldings living room

It’s not just rooms that are subordinate to each other, but architectural details within a room.

The dining room archway dominates, not simply because it is wider, but because the moldings themselves are proportionately larger.

I accomplished this by doubling the pattern — essentially, layering two archways on the same design.  If the moldings had been identical, they would have looked less significant on the larger arch, not to mention I don’t like to duplicate patterns if I don’t have to.

moldings different size in same room

The largest opening received the largest and most detailed archway.

Above and Below  Note how I used the same individual pieces of molding for each capital, and the same ornate applique, a rosette.  This maintains unity between the two designs.

However, the archway capital in the above picture is larger because I doubled the pattern.  Also, the large pilaster has recessed panels on the inside pilasters whereas the smaller archway (below) has flat-stock — though an ornate applique has been applied as an after-thought.

moldings of different styles and sizes in same room

Same design and molding details on this capital as the larger one, it’s just smaller.

Example #2

Transitions from public to private space can present a challenge, since it would be awkward to carry a crown appropriate for a great room into an upstairs hallway without upgraded baseboards and  door trim (I’ve done it, and will post those pictures in the near future).

Here, the homeowner choose two crown moldings of the same design, but of different scales to mark the transition between great room and upstairs landing.

large and small crown moldings in same room

Same style crown molding styles but on different scales accounts for subordination in their respective rooms.

Example #3

Below  A large, two-piece baseboard that runs through the foyer and living room transitions into a smaller pattern in the back hallway.  This hallway could have had a grand baseboard too, but that would have required we upgrade the door trim as well — and that was not in the renovation budget.

large baseboard in foyer

BASEBOARD-103 makes an easy transition down to BASEBOARD-108.

To achieve architectural subordination, you will need to think explicitly about each room, and how the moldings will transition between rooms.  Done properly, it will communicate the function and mood of each space in a way that looks natural, seamless.

Good luck designing the transitions in your own home!

[This is part of my How to Install Moldings series.]

Let’s hear what you have to say about architectural subordination in the comment section below.


Why Moldings? I Am My Father’s Son

Update: My dad, Herb O’Brien, passed away in late January, peacefully and at home, right where he wanted to go. He was a wonderful dad, and I’ve missed him every day since.

His last year was quite difficult, and so helps explain my lack of publishing new posts since July. But now with life settling down to a new normal, I’ll resume creating new molding patterns for you to enjoy.

moldings historic architecture

A model of the HMS Beagle my dad built for me, and one of my most used architectural books. Both sit just above my computer as I write DIY molding post for you.

Everywhere my dad lived he would eventually upgrade some of the moldings.  Usually just the baseboards, but sometimes the door trim too.

This came to mind as I stood in the great room of my newly purchased home, the one that started my love of moldings.  “I’m a homeowner now,” I thought to myself, “I can do anything I want to this house.  So what should I do first?  Paint the walls, of course, but what else?  Dad always upgrades the moldings where he lives, maybe I should look into changing the moldings.”

moldings and detail

My dad building one of his sailing ships.

Dad has no particular love for historic architecture, and his upgraded moldings were never more than slightly larger than the old ones, but he loved tinkering with the house on the weekends — a vastly different activity from his day job as an automotive draftsman, sitting at a drafting table all day designing functional parts for Cadillac interiors.

But as his mobility declined and with it his ability to take on big home diy projects, he focused more on tending his flower gardens and building model sailing ships, some from kits, and later, as his skills improved, from scratch.

Mention that you served on a particular ship during WWII and next thing you know dad would take a year off from whatever sailing ship he was building at the time and build you a replica of your old ship — configured exactly how it was during the years you served on it.

That’s my dad: Cadillacs, gardens, home improvement and ship builder; an all-around detail guy.


Jet engines, wildlife biology and architectural details.  I am my father’s son.


Joseph’s New Appliques

woodworking ornaments

They came in and I’ll have to say is, wow, the resolution is amazing.

— Joseph, The Joy of Moldings reader

I agree, Joseph. And you can’t go wrong with the beautiful urns and swag ornaments you chose to use in your design.

Please send us some pictures of your completed work, I’m sure my readers would just love to see what you’ve created!



door trimTraditional Style

I found this beautiful door surround last summer gracing the hall of an historic building in Grand Rapids Michigan.

I think the building is an art college of some sort, though I don’t remember exactly because we were looking at all of the wonderful art displays during Art Prize. This year, when I attend Art Prize again, I’ll find out the name of the building and what it’s original purpose was.

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ARCHWAY-102 and Ornaments of Life!

archwayTraditional Style

Many homes with open floor plans have at least one large walk-through opening like this one.

Why not bring attention to it by wrapping it in a beautiful surround of moldings and enhanced with architectural ornaments?

In the Before picture below, notice how much space there is to build something big and beautiful here.

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crown moldingSmall Ogee

This is your standard-issue, ogee crown molding.

You can use it as part of pretty much any architectural buildup you can think of; valance boxes, entablatures, fireplace mantels, newel posts — just to name a few.

I used this one as part of a flying crown molding.

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Wood Molding Warpage: A Warning

poplar baseboard

[This is part of my How to Install Moldings series.]

If you are going to use a tall, single-piece baseboard like the one pictured above, then you need to know about warpage.

I had to deal with it when I used the above molding profile (BB-002) while wrapping it around the pilaster bases of FIREPLACE MANTEL-103.

First of all, keep in mind that this is a high-quality poplar baseboard I picked up at a really good lumber yard, and not an inexpensive finger jointed pine product.

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Make Flying CROWN MOLDING-108 for c. $3.08/lf

crown moldingTraditional Style

Some of these pictures may look familiar to you since they make up my post on how to make a crown molding finial return.

But this time I want to focus on the crown molding itself.

Especially now that I have the original crown model I made for Greg way back when I was working up the design (Thanks for saving it Greg!).

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How to Install Crown Molding Series

crown molding designs

Click image to see all numbered crown molding patterns.

CROWN MOLDING PATTERN INDEX |  CROWN MOLDING-100  | 101 |  102 DIY  | 103 DIY  |  104 DIY  | 105 DIY  |  106 DIY  |  107  |  108 DIY  |  CEILING MOLDING-100  |


Making it Easier to Navigate The Joy of Moldings

In an effort to make it easier for you to navigate the over 400 pages of information I’ve posted here on The Joy of, I’ve decided to consolidate my PATTERN BOOK with my more general categories that you find on the right side of your screen.

Since I have more crown molding posts than any other kind, I thought it best to start here, and then work my way through the other PATTERNS over the next week or so.

I hope these changes help you find the information you are looking fore here on The Joy of Moldings.

All of my crown molding-related posts are below.

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Before & After: CROWN MOLDING-103 Installation

before crown molding

[This is part of my How to Install CROWN MOLDING-103 series.]

The traditional style crown molding I installed in this boy’s room, complete with these toy airplanes hanging from the ceiling, is a classic design that’s an appropriate style for the majority of homes in North America.

But I warn you, crown molding is the gateway drug to the permanent condition of wanting to upgrade all the moldings in your home, once you see a nice three-piece crown molding like this one installed in your very own home!

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Make CROWN MOLDING-101 for c. $3.62/lf

crown moldingTraditional or Victorian

Finish carpenter installation price c. $14.00/lf + $15.00/corner or return

If you’ve always wanted an ornate crown molding in your favorite room, this pattern might just be the very thing for you.

It’s three pieces are not only very affordable and easy to install, but you can buy all the materials at your local lumber yard and get started this weekend.

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Return Your Chair Rail On Top of Door or Window Trim

chair rail return

[This is part of my How to Install Moldings series.]

Historic Example, 1928

When your chair rail pattern projects beyond the door or window trim, then the proper way of installing it is to return it on top of the casing and not butted into it.

This example I found in the historic Allen House in Birmingham, Michigan. The chair rail is a two-piece design and acts as the wainscoting cap as well, though you will often find it as a stand-alone chair rail.

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