(03-16-2020, 09:18 AM)Cooler Wrote: I am installing a new bathtub surround.  I will be using cement board.  I will only need to make a few cuts so I do not want to invest heavily in new equipment.  I am hoping I will only need a special blade for one of my existing saws.

I have available:

Circular saw
Jig saw
Sawzall saw
4½" hand held grinder
Multi-tool
Carbide hand scoring knife (originally purchased to size formica)

Suggestions will prove helpful.

(03-18-2020, 03:24 AM)mike4244 Wrote: Utility knife and a Surform tool. If you have access to a small piece of wire lath then it works better than a Surform tool to smooth jagged edges.
Cut a 2x3 6" long and bend the lath around the bottom and up each side 1/2". Nail the lath to the block using large head nail like a roofing nail. 
You will have a block with wire lath that will last 10 years with daily use. Dry wall guys used these blocks til Surform tools were sold. Some still prefer the wire lath as it much faster.
mike

(03-19-2020, 08:27 AM)$awdust Wrote: I put my old tile saw blade in my skil saw.  Cut like butter and smooth.

(03-19-2020, 11:15 AM)Cooler Wrote: I have a tile wet saw.  I didn't think it would work while dry.  And I didn't know that the tile saw blade would fit my circular saw.

(03-20-2020, 09:43 AM)rschissler Wrote: Maybe just a couple cuts will be ok, but I would only do this with an old or low cost circular saw.  Repeated use will eventually ruin it, because of the cement dust.

(03-24-2020, 08:13 AM)Cooler Wrote: Thanks for that information.  I would not want to ruin either of my circular saws (one plugs in, the other on battery).

It is only a few sheets, so I will use a scoring knife or a hacksaw for notches. (On the assumption that if it is bad for the circular saw, it will be bad for my angle grinder.)

(03-24-2020, 09:56 AM)rschissler Wrote: Yes.  That's why I use a $9.99 with coupon, Harbor Freight angle grinder.  Burned up one already, and second one on it's last legs. And why I wouldn't use my Makita circular saw.