predrill a HOLE not a "hold" through your plaster layer.
I hate typos, but dang my keyboard keeps myseriously spitting them out no matter how many times I beat on it to punish it for making typos.
&^%$$ *&^%$ *&^%$#!!!!
--- In papercreters@yahoogroups.com, "JayH" <slurryguy@...> wrote:
>
> Your low cement papercrete should hold a screw well. The key is to use a screw that will hold the weight you intend to put on the shelf.
>
> Some nice long lag screws should hold into the papercrete beautifully and support substantial weight.
>
> You may want to predrill a hold through your plaster layer to prevent it from cracking or chipping chunks away. That may not be needed depending upon the characteristics of your plaster. I'm not sure.
>
> If in doubt... you probably have some scrap papercrete blocks laying around. Try test screwing/bolting something to those blocks to make sure your system works before trying it on your finished wall.
>
> You can always paint the bolt/screw heads to get them to match the shelf brackets.
>
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