Posts Tagged ‘smooth surface’

Smoothing Over A Mess

August 3, 2022
This kind homeowner had the sink / vanity in this powder room removed. This makes it a LOT easier and faster for me to to get the wallpaper up, and with less stress on the paper and fewer relief cuts .
Removing a sink that’s attached to the wall often damages the surface. Here you can see how the workman used spackle compound to cover the torn drywall and other damage.

s

Close-up. This isn’t a very smooth surface, and the wallpaper will have a hard time grabbing ahold and adhering. It’s also way too porous and crumbly to support wallpaper.
In the top photo, you see where I have applied smoothing compound on the upper portion of the wall. I’m working my way down.
Once it’s dry, I will sand and prime it, and it will be nice and smooth.
Here’s a shot of the fresh smoothing compound, before sanding.
Some people use a drywall taping knife or a broad knife to apply the plaster-like substance. I prefer the trowel you see in the photo, because it gives me more control and precision.
The 2″ flexible putty knife is for getting into smaller areas. The 3″ stiff ” Hyde ” putty knife is for knocking off high points or bumps on the wall before applying the smoothing compound.
This process is called skim-floating or skim-coating .
I like to use the Plus 3 lightweight joint compound made by Sheetrock . We just refer to it as mud . Find it in the drywall aisle.
The Plus 3 spreads on easily enough, sands easily , and the dust falls to the floor where it can be vacuumed up easily – as opposed to getting air-borne and drifting all over the place.
This box, which is approximately one cubic foot , weights 32 pounds . Ugh. Try carrying that across a parking lot and then up to the third floor of a townhome!
I like to transfer the material to a 5-gallon bucket. This is what it looks like in the bottom of the bucket.
Easy to scoop out. When I’m finished, I use a wet hand to smooth down the surface, wipe residue off the sides of the bucket, then place a thick sheet of plastic over the surface to keep air from drying it out. Then, of course, I put the lid onto the bucket.

Rubbery, Problematic Smoothing Compound

June 15, 2018


I was stripping wallpaper by peeling off the top vinyl layer and then soaking the paper backing to reactivate the paste so the paper could be removed from the wall – and ran into this.

It looks like the previous installer smoothed the wall (which is good), but used a latex spackling compound instead of the more typical joint compound. The latex became wet from the water I was using to soak off the wallpaper, and began to pull away from the wall.

This is all bad, because it leaves a bumpy mess on the wall that will show through the new paper. But worse is that it is an unstable surface for the new paper to try to hold on to. When wallpaper paste dries, the paper shrinks and puts tension on the surface below, particularly the seams. If the surface is not solid, the layers can actually come apart (delaminate) resulting in curled or gapping seams.

This is not “loose paper,” and cannot simply be glued back down. The different layers inside the wall are actually coming apart, and will require a lot of work to make the wall sound again.

Once the paper was off and the wall was good and dry, the layers seemed to adhere to each other better, and the wall felt more solid. The way I treated it was to roll on a coat of Gardz, which is a penetrating sealer that binds things together. It did a good job. Then I skim-floated over that with joint compound, which, when sanded, would leave a nice, smooth surface.

One more coat of Gardz on top of that, and the wall was sound and ready for wallpaper.