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How to Mud Drywall

How to Mud Drywall
After hanging a drywall, it is very important to finish it well, so that it looks even. Given here are the instructions for this DIY project.
Bidisha Mukherjee
Last Updated: Feb 15, 2019
The main areas that require skill and patience while doing this task are the seams, screws, and corners. So, do not carry out this home improvement project in haste, take some time over it, so that you get the best results.
To finish a drywall, you will need at least 3 coats of mud or joint compound, as one coat does not help. Why? Because, mud shrinks as it dries, therefore for an even look, you need to apply more coats.
You will need tools like gloves, goggles, old clothes, mud, one mud pan, a roll of drywall tape, flat drywall knives of various lengths, and a metal corner spreader. Given ahead are the instructions that need to be followed while applying mud to your newly installed drywall.
Home Renovations - Drywall Mudding
The line where two boards of drywall connect is called a seam or joint. Take a knife and slide it over the hung drywall and find out where the screw of the seams hit the knife. Thus you can identify the location of the seams.
Measure the length of each seam and take some mud on a metal spreader and coat the center of the seam, covering its entire length so that a uniform layer of one-fourth inch is formed. Cut tape as per the length of the seam and paste it over the applied mud with a gentle hand.
Flatten the tape properly using the knife, so that the excess mud comes out of the seam. Let it dry overnight. Apply another coat of mud on the seam covering the width of the tape. This step should be repeated once the second coat dries. When all the three coats dry properly, sand the mud to get a smooth and even surface.
Man worker applying the layer of putty with trowel
A drywall has two corners- inside and out. There is a difference on how you apply mud on these two corners. To begin with, measure the inside corner and cut the tape accordingly. Apply mud on the tape to form a thin bed and press it over the inside corner using a knife.
Put mud on the tape so that it forms a thin layer of about an inch. Spread it up to 2 inches on both sides of the corner joint. Once the previous coat dries completely, apply 3 coats of mud on it. The outside corners of a drywall consist of fiberglass or metal corner beads which are fitted with nails.
Add the first coat of mud on the corner bead and spread it over 4-5 inches away from its edge. The next coat has to be extended to 6-8 inches and the final one should cover 10-12 inches.
Drywall worker
Inspect each and every screw or fastener on the drywall carefully and ensure that the head of each screw is below the surface of the drywall. Take small amount of mud on a knife and smear it over the screw heads covering them completely.
Take small amount of mud on a knife and smear it over the screw heads covering them completely. Do not use excess mud as it will form lumps on the drywall. Allow the mud to dry overnight and apply another coat on the next day. This should be repeated 3 times or more until the screw holes have sealed.
Always remember to wait for each layer to dry completely before applying a new one. Also, always apply multiple thin layers instead of just one thick one.