Contractor Talk - Professional Construction and Remodeling Forum banner
1 - 20 of 51 Posts

·
Registered
Joined
·
11 Posts
Discussion Starter · #1 ·
Due to the snow last week, we left our trailers parked and thought we had what we needed at a condo rehab we are doing. Anyway, we forgot hole saws to cut shower valve openings for the 1/2 hardibacker. Instead of going to get the hole saw, We improvised by driving a screw every 1/2" around a circle then just punching it out to get that perfect hole. Gave us a clean hole, no dust, and was quick. Anyone got other good improvising tips they have used?
 

·
Hair Splitter
Joined
·
18,810 Posts
I just use a keyhole saw.....
You are not cutting through a half inch of hardibacker with a keyhole. Maybe durock, but not hardi. You'll dull the blade before you get half way through it. It won't even cut 1/4".
 

·
Hair Splitter
Joined
·
18,810 Posts
Great idea what size hammer do i use?. 23oz shower valve, 17oz tub spout :whistling
5lb sledge does the trick. About the right diameter.
 

·
Hair Splitter
Joined
·
18,810 Posts
True enough. I missed the Hardi part. I usually prefer durock so that's what I was thinking of.
No reason in my mind to use hardi. I use Durock for walls and 1/4" backer for floors.
 

·
Registered
Joined
·
838 Posts
Diamond blade on grinder for cement board, old carbide circ saw blade for hardi.
 

·
Registered
Joined
·
226 Posts
No reason in my mind to use hardi. I use Durock for walls and 1/4" backer for floors.
I wouldn't give you two cents for Hardi. Durock is so much easier to work with. For a couple of years, I used a Rotozip with a right angle attachment and a diamond blade, but now I have a Zip Saw by Rotozip with is basically the same thing, just smaller.

As for the dust, well the new Zip Saw has a dust cover with a small hose and an attachment for your ShopVac and it works reasonably well, but I don't use it unless I'm forced to cut indoors.
 

·
Registered
Joined
·
2,777 Posts
How do you guys cut your hardy and durarock? My boss insists on the worm drive with diamond blade, I hate that because of the dust. I always use the score and snap method when I can. Jigsaw at low speed for cutouts
For clean ,dust free cutting---use a little diamond bladed circular saw and press a wet sponge against the blade----

Harbor Freight has a 4" diamond saw for about $40---try it.
 

·
Registered
Joined
·
2,237 Posts
Curiosity...... I've always had to cut hardi (both 1/2 and 1/4).

I've tried score/snap and can't do it (except maybe very small pieces.)

I use a carbide scorer.... is there some trick to it, as I'd like to avoid that dust/sand.....regardless of the evac system I use.

TIA
 

·
Repair & Renovation
Joined
·
3,277 Posts
I use to cut durock/permabase/cement board with a regular 24 tooth carbide blade on a cordless circ saw. Here's the trick though. Wet the cement board with water so it soaks in before the cut. Almost no dust..

Now I just score the board with a regular utility blade and snap it. Just cut the front side. Back won't work..
 
1 - 20 of 51 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top