Skip to main content

Apply Second (Floating) Coat of Joint Compound

11:47
17:47
135.8K views

At 11:47 in

Building a Bonus Room + SOUNDPROOF WALLS || Concrete Slab House Reno (Ep.11)

What happens here

After wet sanding, a second (and potentially third) coat of joint compound is applied. This coat, known as 'floating,' uses a wider taping knife (e.g., 8-inch after a 4-inch first coat) to feather out the seams and blend them seamlessly with the surrounding drywall. For this step, the video uses 'hot mud' (fast-setting joint compound), mixed with water to a 'runny ketchup' consistency using a drill mixer. Hot mud sets quickly, allowing for faster recoating, but requires quick application. The rounded edges of the bullnose trim are also floated to create a smooth transition.

Tools and materials

  • Bucket
  • Drill Mixer
  • Ladders
  • Mud Pan
  • Taping Knife (8-inch or wider)
  • Water

What they say

Hide

all right so now we're going to start floating it this is the child i'm going to be using um this is hot mud which means that it could solidify within like 5 10 minutes give the consistency of like runny ketchup and then what we're going to do is basically create a wider fan than that to blend things in got to get messy a little bit i'm not a drywall guy but this is some diy stuff guys yes 10 minutes it's already getting hard like don't that's that's gross no that this is getting hard not learn my lesson don't use hot mud for doing this and long process it's kind of used for patching stuff you know you somebody put a hole through the wall you can do it all in one day now so i did go and buy regular old joint compound and i thinned it out on water mix it up so it's nice and uh you know shaky or gelatinous i guess

Auto-generated from the video audio.