Ten Secret Drywall Finishing Tips

By Tim Carter
©1993-2008 Tim Carter

Summary: Finishing drywall is an acquired skill, like driving a car. From mixing the joint compound correctly to drywall taping and applying the second coat, here are my top finishing drywall tips to help you get professional results.

Related Artilces: installing drywall, drywall skills, finishing techniques

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.


Learn more secrets to great drywall installation in this Drywall / Plaster Installation Checklist. I offer a 100% Money Back Guarantee.


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.





Comments:

Rob
27 Nov 2007, 19:25
Good tips. The BEST one for a beginner is to FIGHT, FIGHT, FIGHT the urge to use the pre-mixed stuff.

I also find that you can get near professional results THE FIRST TIME if you are willing to do a LOT of sanding.
chris
05 Dec 2007, 22:33
you never mention the 90 minute joint compound... or the much faster drying compunds. there's 60 minute... 45 minute... 20 minute. should these be left to strict professionals? i work for home depot. i have done some drywall. none too spectacularly! but i like to at least tell my DIY customers. id never recommend a mix it yourself compound, mostly because its messy and annoying, but im never sure what quite to say.
AsktheBuilder
06 Dec 2007, 07:58
Chris,
I have several entire articles completely devoted to the dry setting joint compounds. They are fantastic products, but can be very tricky for a beginner. Please go to my Drywall category and read all of the cool tips I have there. The premixed compounds are excellent for new drywall. They are formulated to stick permanently to drywall.
Jason
10 Jan 2008, 17:27
I didn't use drywall tape. My joints all cracked after the primer dried. Why is this happening? What should I do to fix it?
AsktheBuilder
10 Jan 2008, 17:56
Jason,
What?????? Are you saying you just put the mud on the joints no tape???? You are SOL..... Now you have to start over and tape over what you have.
donna
19 Jan 2008, 19:30
i recently stripped wall paper and it tore into the drywall paper,what is the best way to repair the wall??
AsktheBuilder
20 Jan 2008, 08:32
Donna,
I cover this in past columns in my Wallpaper category. Read many of the columns there.
Alan
27 Jan 2008, 15:32
My tape keeps bubbling. Sometimes right over the joint, sometimes at the edges.

Why?
AsktheBuilder
27 Jan 2008, 15:33
Alan,
I tell you why in many of my Drywall Columns. It sounds like it would be in your best interest to read every one.......
Rick
01 Feb 2008, 07:32
Good day the only problem I seem to have is when I apply any coat of pre-mixed I get the little air bubbles or holes. I heard that on the last coat if I mix a little water and dishsoap with it this will help. Any comments on how to get away from those holes
Thanks
Rick

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