The short answer
A Level 4 finish is the standard for most home interiors. Joints are taped and covered with joint compound, fasteners are covered, and the surface is sanded smooth. A Level 5 finish starts with all of that and then adds a thin skim coat of joint compound over the entire wall or ceiling, so the paper and the compound have a more uniform surface under paint.
The practical difference shows up under raking light, dark paint, or glossier sheens, where small differences in texture and absorbency between taped joints and bare paper can become visible.
The six levels of drywall finish at a glance
The Gypsum Association publishes a document called GA-214, “Levels of Finish for Gypsum Panel Products,” which describes levels 0 through 5. In simplified terms:
- Level 0: no taping or finishing. Often used for temporary construction.
- Level 1: tape embedded in compound at joints and angles. Often used where appearance does not matter, such as above ceilings or in some utility spaces.
- Level 2: a further thin coat over joints and fasteners. Sometimes used as a base for tile or in areas where appearance is not critical.
- Level 3: additional coats on joints and fasteners. Often used under heavier textures or heavy wall coverings.
- Level 4: the usual finish for flat paint and light textures in homes.
- Level 5: Level 4 plus a skim coat across the whole surface.
Check the current published GA-214 document if you need exact wording, for example for a contract or specification.
What a Level 4 finish includes
According to National Gypsum’s summary of GA-214, a Level 4 finish has tape embedded in joint compound over flat joints and interior angles. Flat joints get two additional coats, interior angles get one additional coat, and fastener heads and accessories are covered with three separate coats. The surface is sanded smooth. The flat areas of the board between joints are left as they are.
That last point matters. The bare paper face of the board and the sanded compound over joints can absorb paint differently, and a flat paint in soft lighting usually hides this well.
What a Level 5 finish adds
A Level 5 finish adds a thin coat of joint compound over the full surface. This is what people usually call skim coating. The aim is a uniform surface so that joints, fasteners and the board face all look and take paint the same way.
The skim coat can be applied by hand with a wide knife or trowel, by rolling on compound and pulling it flat with a blade, or by spraying and then smoothing. Our article on skim coating over painted drywall covers the roll-and-flatten method for existing walls.
Level 4 vs Level 5: key differences
| Level 4 | Level 5 | |
|---|---|---|
| Skim coat over whole surface | No | Yes |
| Typical use | Most residential interiors, flat paint, light textures | Critical lighting, dark or glossier paints, high-end work |
| Labor and materials | Lower | Higher |
| Sanding and dust | Less | More |
Appearance. Level 5 is intended to give the most uniform surface. Level 4 can show slight differences between joints and the board face under harsh side lighting.
Process. Level 5 takes extra time, skill and compound, plus additional drying and sanding.
Cost. Level 5 costs more because of the added labor and material. Some contractor sources suggest a premium of roughly a quarter to a third or more, but pricing varies widely by region and project, so get written quotes that list the finish level separately.
Is Level 5 worth it?
It is often worth considering when:
- A wall faces large windows or a long hallway with light grazing along the surface.
- You plan to use a dark color or a paint with noticeable sheen, such as satin or semi-gloss, on large walls.
- You are matching a high-end finish where visible flaws would be hard to accept.
For a bedroom with soft lighting and a flat or matte paint, many homeowners find Level 4 is sufficient.
Is Level 4 good enough?
For most rooms, yes. National Gypsum describes Level 4 as a common choice for residential interiors where lighting is not critical. National Gypsum also notes that it is not recommended where non-flat or dark, deep-tone paints will be applied. If you are leaning toward either of those, ask about Level 5 or at least a partial skim coat on the most exposed walls.
How many coats is a Level 4 finish?
Per the description above, flat joints receive tape plus two additional coats, interior angles tape plus one additional coat, and fasteners three coats. Finishers often apply more thin passes than the minimum to get a smooth result, so the actual count on your walls may vary. The standard describes the result you should get rather than a single method.
How to ask for the finish you want
- State the level by name in your estimate or contract, for example “Level 5 on the living room and stairwell walls.”
- Mention the paint color and sheen you plan to use, and where the windows are.
- Ask that the wall be inspected under final lighting. Industry guidance for Level 5 is that surfaces should be viewed under their final lighting conditions, which means design lighting and natural light with window treatments in place.
- Do not rely on the word “plaster” as a synonym. It is sometimes used loosely to describe a Level 5 finish, but it is a different material.
Doing a skim coat yourself
A skim coat is a reasonable DIY project for patient beginners on a single room, though it takes practice. Mix compound to a smooth, thinned consistency, apply a thin layer, flatten it with a wide knife, let it dry fully, knock down ridges, and sand lightly. The setting-type joint compound guide can help you choose compounds for patches and base coats, and the article on skim coating over paint covers preparation steps.
Safety: dust and older homes
Sanding drywall compound produces fine dust. Wear a well-fitted respirator rated for fine dust (such as an N95 or better), eye protection, and ventilate or seal off the work area. Wet-sanding or sponges reduce dust.
In homes built before the 1980s, some joint compounds and wall textures may have contained asbestos (see asbestos in drywall mud). If you are unsure, do not sand, scrape or cut into old compound. Have a sample tested by an accredited lab, or hire a licensed asbestos professional. Paint in older homes may also contain lead, so check before sanding painted surfaces.
FAQ
Which drywall finish level is the smoothest? Level 5 is the smoothest of the defined levels.
Can I upgrade Level 4 walls to Level 5 later? Generally yes, by skim coating the existing surface, though prep and priming matter. See the skim coat article linked above.
Does Level 5 hide poor taping? Not entirely. A skim coat can smooth minor irregularities, but large ridges, bubbles or poorly seated tape should be corrected first. Our guide to signs of bad drywall installation shows what to look for.