A.Gary Katz, moderator of JLC Online's finish-carpentry forum and a frequent contributor to the magazine, responds: If you're working with flat stock, I'd suggest pocket-screwing all the joints together before cutting or installing the pieces. I frequently use pocket screws and butt joints for wainscoting rails and built-up baseboard, as I've found that this is the best way to ensure tight-fitting, durable joints, especially in long lengths.

I use pocket screws in MDF casing, too, if the profile is a simple quirk-and-bead or ogee on only one edge of the molding and there's enough room to pocket-screw the casing together.

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