Trimming drywall

What is the best way to neatly trim about an inch of a piece of drywall that is too wide. I figure the score and snap technique won't work that close to the edge. What about a roto zip or router. I prefer not to use a key hole or drywall saw if possible.

 

How much do you need to trim off? I usually use a utility knife.

 

It's about 6 ft long. That's a lot of manually cutting, at least for me. I saw where Milwaukee has a drywall blade for their Sawz-all. I have a Sawz-all

http://media.askbuild.com/legacy/977-01.jpg

 

Usually scoring and snapping is followed by the use of a drywall rasp to produce a relatively smooth edge.

If you score both sides and place the board over a straight edge and tap it with a hammer you should be able to snap it off with no problem. Then rasp it or run a piece of coarse sandpaper mounted to a block of wood over it to clean up any roughness.

A roto zip run along a straight edge that is clamped to the drywall will of course give you a relatively clean cut but you will have a bit of fuzz paper at the edge of the cut.

What are you trying to accomplish? If it is something like having a clean exposed edge then you are better off using a bead type edging like L bead, J bead or finish J bead.

 

I'd score it using a utility knife and a straightedge, then go over it again with the utility knife with some pressure - it's not a big deal to trim it off.

 

I've cut off far less then that with a utility knife.
Sharp blade two passes and it snaps right off.
No way would I be using a sawsall.

 

Another vote for score both sides and snap. (Works best when the piece is 1" or smaller.) Rasp as needed.

 

Double pass with a utility blade and then walk the snap down. Start at one end and snap - it will break off a 6 to 8 inch piece, slide your hand down and snap again. Continue down until everything has at lease a bend in it. Then make another pass with your utility knife. You will need to clean up the cut somewhat, but its all good as it will be buried under some tape and mud.

 

Jig saw with medium blade and straight edge guide. Alternative to knife.