In order to get a nice appearance, do not leave any gap between the side casing and the floor. If the casing doesn't touch the floor, it is very hard to conceal this gap. It is important to leave the same space around the door jamb on all sides, otherwise you won't be able to make the corner joints properly.
The clearance between the bottom of the door and the finish floor should be 3/8-inch or less. This clearance is set by trimming the ends of the hinge and latch jambs. Just be sure to allow for a threshold or thick carpeting before making these cuts.
How high should baseboard be off the floor? In the majority of cases, the gap between the baseboard and the floor will be between 3/8” and 1/2”.
Door casings come in various sizes, but the standard width is 2 1/4 inches. Anything wider than 3 1/2 inches has to be custom-ordered.
Generally, 6 feet is preferred the most in many of the houses. If you have high ceilings, then you must think of 7 or 8 or 10 feet long door frames for use. While constructing commercial buildings, school, hospitals etc, it is prefered to use 7ft tall in height door frames.
Height. The standard door height of interior passage doors—or, doors that people walk through—is 80 inches. Closet doors may be slightly shorter, at 78 inches. The door installer must meet these minimum height requirements, but they can absolutely exceed them if the home's dimensions allow for it.
In general, vertical trim elements, such as door and window casings, should be smaller than your baseboards. Think 50 percent of your baseboards — in the above case, 3 ½ inches. Your crown molding should be scaled to be smaller than your baseboards and appropriate to the height of your ceilings.
Many homes have baseboards with gaps either at the top, where the baseboard meets the wall, or the bottom, where the baseboard meets the floor. Such gaps are not just unattractive; they can also allow drafts to enter or heat to escape.
Having a gap allows for the smooth opening and closing of the door, preventing scraping and wear of the door itself or the floor underneath. There are safety concerns to consider as well. In general, the gap beneath an interior door will be between three-quarters of an inch and half an inch.
If you're looking for a quick fix and looks aren't the most important factor, caulk is a great option. You will want to line the floor with blue painter's tape to minimize cleanup. You'll want to use a paintable latex silicone caulk to fill the gap. Once the caulk is dried, paint the caulk to match the baseboards.
The gap is called an undercut. On swinging doors it is there to keep the door from binding / catching on the floor. Doors sag over time, so the undercut needs to be enough so you don't hve to keep readjusitng the door to keep it from binding.
You have to see whether or not your door operates easily and quietly, so open and close it several times to ensure there are no problems in this regard. If the door has been properly installed, it will be able to operate normally, and you should be able to open and close it effortlessly without hearing any odd sounds.
Caulking is required if there is a gap of at least one-eighth of an inch between the flooring and the baseboard. This helps to protect them from moisture and dust.
Do not worry, you're not going crazy–it's a common design mistake that can be easily fixed. If your baseboard is thicker than your door frame, you can try replacing the baseboards, adding a larger door frame, adding a thin layer of trim, painting the baseboard a darker color, or adding some decorative molding.
Protect Your Baseboards' Beauty and Longevity
Dirt and grime can accumulate in the gap at the bottom edge of the baseboard and eventually leave the floor looking grungy even after you mop. Caulk at the bottom of the baseboard reduces the risk of this happening.
Next, there are two general rules or essential practices to properly choosing these moldings. One— the casing must always be thicker than the baseboard. And two— the baseboard must always be wider than the casing. Keep these two points in mind and you'll never get yourself into a décor doo-doo.
Here is a great rule of thumb: A standard 8-foot wall typically has a baseboard 3 to 5 inches tall, while a 10-foot ceiling calls for 5 to 7 inches.
The door trim and the baseboards should be the same color. The same color will provide flow through out the house and enable you to play with patten, colors and textures in other areas. You don't want the corners where the door trim and floor boards meet to be the "attention getter".
Knowing how to cut trim for a door is key to getting the right fit. You'll use the miter saw to cut the top of each piece of side moulding at a 45-degree angle to fit into the head moulding. With the saw blade in the correct 45-degree position for the left trim piece, make your cut.
Standard Door Frame Size
The average measurement of 36 by 80 inches refers to the door panel itself, not including the frame. The frame extends beyond the panel, and is installed into the rough opening. The rough opening should be at least ¾ inch wider and ? inch taller than the door frame.
There's no reason it can't, and my own home is an example, having stained oak base trim around all openings as well as against the floor. I can't say I like it much, and when I update the trim I'll do away with the style, but it's not terrible. However, base trim is usually thinner than casing.