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Subject Author Date
Drywall technique Mike Hennessey 06-05-2008
|--> Re: Drywall technique franz fripplfra...06-05-2008
| `--> Re: Drywall technique Bob (but not TH...06-06-2008
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Posted by Bob F on June 6, 2008, 1:07 pm

On Jun 5, 8:18 am, Mike__...@isd.net (Mike Hennessey) wrote:
> I want to try using a sponge to smooth the drywall
> joints instead of sanding in an effort to reduce
> the dust generated.
>
> How long should you let the compound dry before
> using the damp sponge?

A poor technique at best.
Use a good shop vac in conjunction with a MagnaSand unit. The outfit
comes with a screen type sanding pad that is sucke flat to the wall
and makes sanding way easy. The dust is trapped in the MagnaSand water
bucket for easy disposal. Some folks with clay type soil put the wet
dust on their garden since calcium sulfate (gypsum) is a known clay
soil conditioner. Use a spritz of Pam cooking spray to control foaming
in the water trap. HTH


*******************************************************8

Better yet, use the knife more carefully so you don't need to sand much. If you
put too much on, you have to sand it off.



Posted by Bob (but not THAT Bob) on June 6, 2008, 8:03 pm
Joe wrote:
>
> On Jun 5, 8:18 am, Mike__...@isd.net (Mike Hennessey) wrote:
> > I want to try using a sponge to smooth the drywall
> > joints instead of sanding in an effort to reduce
> > the dust generated.
> >
> > How long should you let the compound dry before
> > using the damp sponge?
>
> A poor technique at best.
> Use a good shop vac in conjunction with a MagnaSand unit. The outfit
> comes with a screen type sanding pad that is sucke flat to the wall
> and makes sanding way easy. The dust is trapped in the MagnaSand water
> bucket for easy disposal. Some folks with clay type soil put the wet
> dust on their garden since calcium sulfate (gypsum) is a known clay
> soil conditioner. Use a spritz of Pam cooking spray to control foaming
> in the water trap. HTH
>
> Joe

It does work, but even the 220 screen leaves a surface that's too
"scratchy" looking to me under critical lighting.

If you buy one, shop locally, because online prices are much higher -
and make sure you have hearing protectors rated for aircraft carrier
flight decks (no kidding, I have a pair) because that baby really HOWLS!

Posted by EXT on June 6, 2008, 5:11 pm
Sanding with a large sandpaper holder, either with or without a vacuum
serves to flatten the mud, making a smooth surface across the sheets of
drywall. Unless you have kept the mud buildup to a minimum with no hills or
bumps a wet sponge will only smooth out the bumps into gentle hills and not
take off any excessive mud, which is needed to get a dead flat appearing
joint. The gentle rolling hills will be visible after the first coat of
paint.


>I want to try using a sponge to smooth the drywall
> joints instead of sanding in an effort to reduce
> the dust generated.
>
> How long should you let the compound dry before
> using the damp sponge?
>
> TIA
>
> Mike
>
> ..................................................
> my email address contains no
> numeric characters


Posted by Bob (but not THAT Bob) on June 6, 2008, 8:19 pm
EXT wrote:
>
> Sanding with a large sandpaper holder, either with or without a vacuum
> serves to flatten the mud, making a smooth surface across the sheets of
> drywall. Unless you have kept the mud buildup to a minimum with no hills or
> bumps a wet sponge will only smooth out the bumps into gentle hills and not
> take off any excessive mud, which is needed to get a dead flat appearing
> joint. The gentle rolling hills will be visible after the first coat of
> paint.
>

Absolutely right - so if you sponge, be sure to get something BIG like
the ones Lowes & DoItBest hdwe sells:

http://doitbest.com/Sandpaper+and+emery+cloth-Ali+Ind.-model-303895-doitbest-sku-303895.dib

and use it in a circular motion like you're washing a wall.

Posted by Barney on June 6, 2008, 7:22 pm

>I want to try using a sponge to smooth the drywall
> joints instead of sanding in an effort to reduce
> the dust generated.
>
> How long should you let the compound dry before
> using the damp sponge?

I get my dear sweet old mudder to do my drywall finishing.



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