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Tapered Edge Taping Problem

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  • Tapered Edge Taping Problem

    Hello: I'm not a real rocker, but I do an awful lot of it- additions and remodels, etc. My butt joints are invisible, and my inside corners, (with modern materials) are perfect. But the last couple of years I've been having trouble with the long edge. I always rake too much mud out, then it seems to shrink a little more. Then, like on a smooth ceiling, I'm hitting it over and over again to leave the surface flat.

    I only really noticed this the last few years, like since I switched over to lite compound. I like my Marshalltown knives, but I figured out they must be too flexible, or my technique has changed without me knowing it. I must need a real stiff knife, or maybe I should try a trowel. Or try to leave a ridge in there on the second coat.

    Sorry to be so wordy, but if any of y'all would comment I would sure appreciate it.

  • #2
    Re: Tapered Edge Taping Problem

    You want your knife to be flexible (atleast I do). Lay it on alittle heavy onthe block coat and pull it tight on the skim coat. All I do these days is remodelling, so I usually hit the flats and nails an extra time to cut down on sanding - all we do is smooth here.

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    • #3

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      • #4
        Re: Tapered Edge Taping Problem

        Thanks guys, I went back over there today and got some good light on the ceiling and really studied what I was doing. Bill P., do you mean like put a heavy coat on then drink coffee for a minute before you knife it down? I tried that and I think it will help me a lot.

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        • #5

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          • #6
            Re: Tapered Edge Taping Problem

            Seams cannot be always perfectly straight because the framing is not. One tries his best to get them straight, but many times it's impossible. Suggest on your 2nd coat you do not thin the mud thus less shrinkage. Try to bend your knife a little on the 2nd coat too and then for the final coat thin it. Keep the 10 or 12" knife for the final coat at the smallest angle possible with very little pressure on it. By the way, vertical seams are never straight - just cannot be done!

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            • #7
              Re: Tapered Edge Taping Problem

              Myron,
              What are these guys talking about?

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              • #8
                Re: Tapered Edge Taping Problem

                I dont want to gice wrong advice here but i like using a flexible knife on my first bed coat and use a little stiffer (blue steel) knife on my finish coat. i feel that if you can get a nices flatter skim with a wide stiff knife. just my opinion. The flexible knifes are good to put pressure with when bed coating in my opinion.

                Bedros

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                • #9
                  Re: Tapered Edge Taping Problem

                  For my fill coat I use a beveled trowel. It leaves the desired crown, a little for shrinkage and a little for sanding. It measures 14" by 4 1/2". My final coat is just a skim coat and I use a wide taping knife for that.

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                  • #10
                    Re: Tapered Edge Taping Problem

                    Today I tried a drywall trowel I spotted at a supply house over in the city. Think I am going to like it a lot. This was my second coat, what I guess you guys are calling the block or fill coat. Real nice and flat.

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                    • #11
                      Re: Tapered Edge Taping Problem

                      Switch back from the lightwieght. I fthat is when your prob started.

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