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Ten Secret Drywall Finishing Tips

I have bad news. Even if you follow these ten finishing tips, you may not get professional results. Why? Drywall finishing requires hand-eye coordination. Some people have it and others simply don't. One of my employees couldn't finish drywall to save his life. I tried and tried to get him to hold the broad knife the right way, but he never could get just the right smooth gliding motion with that knife.

You also need to develop the touch. This is a talent that is acquired. It is much like driving. You get to where you know the feel of a car and a road surface. Finishing drywall is the same. You get a feel for the flexibility of certain tools and the consistency of the joint compound. I say we give it a try. Here are my Ten Tips:

1. Drywall Must be Ready

Great drywall finishes begin with superior hanging jobs. The drywall must be tight against the wall studs or the ceiling joists. All screws need to be countersunk just enough to where they do not tear the paper. There needs to be enough fasteners. I like to see screws every 16 inches on walls and every 12 inches on center on ceilings. Tapered seams should be tight. Corner joints or other joints should have a gap of approximately 1/4 inch. A tight seam is best but a slight gap is acceptable.

2. Mix the Mud

Most people use pre-mixed mud in a bucket or a box. This mud is simply too stiff to use. You need to add a little water and whip the mud up to the consistency of creamy cake icing. It must be lump free. Be careful not to mix too much air into it. If you do, sometimes you get tiny air bubbles in your seams as you apply and finish the mud. Just try to mix the mud slowly. Do NOT add too much water.

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3. Paper or Mesh Tape?

I have used both. I prefer to use the paper tape in corners and the self adhesive mesh tape is superb for tapered seams. I will use paper for both with no hesitation. If you have lots of taping to do, fabricate a belt holder using a coat hanger that holds the roll of tape. Or you can buy a handy holder at a drywall supply house.

4. The Right Tools

I prefer stainless steel broad knives for finishing. I have 10 and 12 inch knives. For taping, I use a flexible steel blade that is about 5 inches wide. It is important to use a file to slightly round off the corners of your taping knife. A brand new knife has very sharp corners and they will tear the paper tape as you glide it down a corner seam.

5. Finishing Order

I do all of my flat seams first and run the tape to within one half inch of the corners. I then do the inside corners last so that this tape overlaps the flat seam tape. Before you start to tape, all metal and curved corner bead should be nailed in place.

6. Size of Work Area When Taping

On flat seams I will apply mud to just about four or five linear feet of seam. I do the same in corners. I press the tape in place and start to scrape the seam to remove excess mud. I stop about six inches from the end of the excess mud. I then apply more mud to the drywall to proceed.

7. Start Second Coat Immediately

You can second coat immediately after you have finished taping. The tape does not have to be dry. It will dry out as the second coat dries.

8. Second Coating Corners

You can't apply the second coat of mud on both sides of a corner at the same time. You do one side on one day and then the other side on day two or after the mud is dry. You can finish three corner surfaces where a ceiling meets the inside corner of two walls at the same time. If I was looking at an inside corner I could do the right side vertical wall seam of the inside corner, the ceiling side of the right wall/ceiling intersection and the top wall side of the left wall/ceiling intersection. On the following day you would coat the remaining three corner surfaces. Corner tape should have a 1/16th inch layer of mud over the tape once complete.

9. Second Coat Has Lift Marks!

Everyone tries to get the second coat perfect! Big Mistake! The feathered edges where the mud stops and the drywall paper begins must be clean with no excess and the mud must build up from there to a high point at the center of wall and ceiling seams. You will see this ridge line and any lift marks where you pull the knife away from the wall. Once the mud dries you will quickly sand these off before applying the third coat of mud.

10. Use the Right Sealer/Primer

After you have third coated and final sanded the seams, corners and nails, you MUST apply a superb sealer/primer to the walls before you paint. USG Corp makes a fantastic inexpensive paint called First Coat®. It is ideal. It eliminates joint banding and texture problems that happen when regular paint is applied to freshly finished drywall. The primer sealer is applied like any other paint and looks milky as you roll it. But somehow an hour later the wall is snow white! Failure to apply a primer/sealer before painting will negate all of your hard work.

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17 Responses to Ten Secret Drywall Finishing Tips

  1. This is interesting. I'm wondering about #8. "You can't second coat both sides of an inside corner at the same time". I use a corner tool to do both sides at the same time, I don't know why I can't do something that I've always done. Good article.

  2. Its also like not eveyone can paint. Its an art also.I like using Zinnser 123 primer on new rock or plaster. It helps create a water vapor barrier especially for outside walls.

    Thanks for your tips on finishing. I'm doing a complete bathroom remodel and at the rock hung. Now to tackle the mudding!

  3. Also not everyone can paint. Its an art that not everyone one can master. I have never come across a one step one coat coverage paint that looked good. I perfer to use Zinnser 123 primer on rock or plaster. It help create a water vapor barrier.

    Thanks for the corner and ceiling line tips. I at the mud stages on a bathroom remodel. It was a total destruction and rebuilt that gave 2 more feet to master bedroom.

    I'm a painter by trade and have always struggled with corners!

    Any sanding grit or type you perfer for the different stages?

  4. As you stated not everyone can finish, not everyone can paint. When I prime I like to use Zinnserr 123 primer. It creates a vapor barrier especially good for outside walls.

    Thanks for the corner/ceiling tip when muddin. Doing a bathroom remodel and I get to be the lucky one who does the muddin. I'm using the mesh tape and use it for some areas that need small patch. In those ares I cross the tape.

    Well better get back to the rock. Thanks again!

  5. Thanks for the tips. I do drywall as a profession and I'm always looking for the best process. A little worried about doing second coat right after tape. I guess any blade marks on inside corners will be covered by 2nd stage of second coat. How about knives? I use a 4" and 6" for most of the process, ( except on butt joints) and they do not have that little flat edge on the side. What do you prefer and why? Also, do you skim coat the whole wall after third coat? Is the Sherwin Williams primer any good? How about Valspar? I water my mud down to set tape because it flows out nicer. Can this back-fire?

    • Glenn, lots of questions!

      I use a 10-inch knife for second and third coat work. I like that it gives me plenty of work room applying and removing mud. I don't skim coat. It's a wasted step if you use the high-quality sealer primers. You can paint far faster than you can skim coat and clean up. Be very careful about thinning mud! You THIN the glue at the same time that holds the tape to the wall!

    • Benjamin Moore first start latex primer. Its multi purpose. Works great for almost anything. If not everything!
      Experience 2 years in the trade...

      Sherwin is okay... IF your looking for quality BM

  6. Added tip* prefill you're gaps and tape with the heavy mud. And for the rest of the coats use lightweight.
    On third coat, use own judgment but I scrape all the mud off and be sure to cover all edges of second coat.
    When spotting screw's, do not take any shortcuts. Make sure they are all countersunk the first time. And any other blemishes or torn paper on the rock, beat or rub in with knife handle lol and fill with mud while spotting. Don't want any surprises on your primer coat.
    Smile more.

  7. I'm re-drywalling a bathroom. I've left the ceiling up. Can I make the wall to ceiling joints look good? Little nervous.

  8. I am an expert drywall repairman and finisher All of my seams are done in only two coats with no sanding in between. First coat is applied using 90 or 45 even 20 minute set powder compounds mixed accordingly with water. After first coat is dry enough you will use a six inch putty knife and scrape down lap marks and trowel ridges ( if you had used a 12 inch knife to start you smooth out edges with little or no ridges by tilting the blade to a sharper angle always use a twelve for seams) second and final coat to be applied using standard box or bucket compound thinned accordingly like you stated Tim apply with twelve inch trowel after surface is completely dry then light sand to perfection. EXPERT DRYWALL REPAIR NC.ON MANTA.

  9. Absolutely! Mark, this is my profession as well totally agree with what you say. I use a 12 in curved trowel for my tapers and butt seems first coat. With 90 45 20 dura bond. Finish coat lightweight compound. Tight skim with 14 inch flat trowel. No paper tape at all. All mesh, butts, seems, and inside coners. I do all my inside coner work with just a six inch knife. A lot of people would never know to round the coners of your new taping knifes or trowels, that's a must!!!!!! as Tim stated. Helps with the breaking in process as well. And always keep your tools clean!

  10. This guy is doing dome drywall work for me and he is using a set 45 mixed with joint compound and he put dawn dish soap in it as well, what negative effect will this habe? Never heard of this I'n my life!

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