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Taping and Mudding Drywall Instructions

Taping and Mudding Drywall Made Easy

By Mark J. Donovan

Taping and mudding drywall to some extent is an art that takes some practice. However, most DIY homeowners can tackle a small taping and mudding drywall project if they first get the right tools and get a little upfront training.


Install the Drywall properly


In order to perform a quality taping and mudding drywall job you first have to make sure that the drywall is hung properly.


If you are installing drywall in a room, first install the drywall on the ceilings. Then install the drywall on the walls starting at the top with the first row, and then working your way to the floor with a second row of drywall, assuming your walls are 7.5 to 8 feet in height.  The drywall seams should be minimized to help ensure a quality finished wall look.


Note that it is important that the tapered ends of the drywall butt up against each other so that they create a slight depression line half way up the wall. This depression area enables the tape and mud to be liberally applied over the joint without creating too high of a bulge.



Taping and Mudding Drywall


First Coat


If you are using drywall paper tape, apply a small skim coat of mud over the joints before applying the tape. 


If you are using the sticky fiberglass tape, you can apply it directly to the drywall seams and joints.


Once the tape has been applied to a seam or joint. Apply a thin coat of mud over the tape and seam/joint.


Use a 6” broad knife to apply the mud and run it down the tapeline with long continuous strokes. Do not run the knife perpendicular with many strokes.


This will create many vertical lines that will need to be sanded. Once you have applied the first coat of mud let it dry.


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Second Coat


After the first coat has dried, use a 10” wide broad knife and apply a liberal amount of mud along the length of the seam for the second coat. Again use the knife with long strokes that run parallel to the seam versus perpendicular to it.


When applying the second coat, try to angle the blade ever so slightly such that there is more mud left near the center of the seam/joint and less at the edges. Basically you want to build up the seam/joint area with a little extra mud to fully cover the tape.


Note that this second coat should spread out the seam such that it is approximately 10 inches in width.


Again let this second coat dry.


Third Coat


Before applying the third coat of drywall mud use your 6” knife and knock off any high spots or burrs on the drywall seam.


Now apply a skim coat of drywall mud over the seam, again fanning the seam out slightly wider than the previous application of drywall mud. The purpose of this coat is to feather out the seam and fill in any miniscule cracks or lines in the existing drywall mud seam.


Again let this third coat dry.


Applying Mud to Inside and Outside corners


There are a couple of tools that are specifically designed for taping and mudding corners. You may want to purchase Inside and Outside Corner trowels.


Applying Mud to Nail/ Screw Holes


As with the seams, apply 3 coats of mud to the nail / screw holes. No tape is required for the nail / screw holes.


With each pass, feather out the drywall patch so that after the 3rd coat the screw hole is covered with approximately a 6” wide circle of mud.


Sanding Mud Seams and Joints


The best way to sand the seams and joints is to use a drywall pole sander. A pole sander is about 4 feet long and has a flexible 3.25”x9” head on it that you apply drywall mesh sheets to. You can also use a drywall hand sander as well.


When sanding the seams and joints make long strokes with the pole or hand sander in a direction that is parallel to the seam/joint. Apply less pressure to the middle of the seam and more toward the edges.


It is important that you sand the edges of the seam so that they completely feather out to a smooth finish with the un-mudded drywall. As you near the edges of the seam, you can turn the angle of your pole sander such that it is on a 30-45o angle.


Preparing walls for Primer and Paint


Once you have sanded all of the seams and joints, wipe the walls down with a slightly damp rag to remove the drywall mud dust.


Next apply a coat of primer.


Then apply a couple of coats of paint, and your walls are ready for trim.


How to Repair a Large Drywall Hole Ebook - If you have a large hole in your drywall and need to repair it, you can either call in a drywall contractor and pay an arm and a leg, or you can fix it yourself. The "How to Repair a Large Drywall Hole Ebook" will show you how to repair your damaged wall so that it looks as good as new.

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- Taping and Mudding Drywall Instructions -

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