cutting cement board

[eprante]

I am planning on forming a brick arch for my under stand wood storage. I was planning on framing the corner with hardibacker attached to 1x1. Does the hardibacker cut with a jigsaw- I have never used the stuff before?
Thanks,

Eric

[Les]

Eric, normally it's just scored and snapped but there is no reason you can't use a jig saw.

Les...

[eprante]

I have heard of scoring and snapping, but I need a curve. Thanks Les.
Eric

[fxpose]

For curved cuts on cement boards I use an abrasive (no teeth) blade on a zigsaw.

[Ken524]

Originally Posted by fxpose

For curved cuts on cement boards I use an abrasive (no teeth) blade on a zigsaw.

If you use a standard toothed blade with cement board or hardi, you'll eventually end up with a no teeth blade.

[olddude]

not teeth than how can you eat pizza

[Millstone Man]

Why don't you use a router a zipsaw? Best way to cut round shapes. Just make a jig to keep you perfectly round. I am in the process of doing the exact same thing (a brick arch for the wood storage). I used MDF as it cuts much easier and I only need it to to hold up long enough for my mortar to dry. I will attempt to post some pics tomorrow but I've not tried adding pics yet. In the meantime you can check out my gallery photos posted in my signature line?

[RTflorida]

I'm pretty sure you can buy cement board jigsaw blades and they are only a few dollars. I've used a circular saw many times for straight cuts (with a cement board blade) and diamond impregnated holes saws for plumbing cutouts. Cement board circular saw blades are pretty cheap ($10?).....the diamond holes saw are a different story - $20 and up, each.
Try Lowes or Home Depot for the jig saw blades, I am pretty sure I have seen them, I believe they were from Bosch.

RT

[SCChris]

I used the "Alltool 9000" AKA The angle grinder.

Chris

[Millstone Man]

Here is my brick arch under construction with form in place. I do a section and then slide the form down.