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Old 01-25-2013, 11:18 AM   #1
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How do you cut cement board? Will a small hand saw work? Or do you have to have an electric saw ? Trying to put around my shower and have to cut top pieces. Would also like to know if I need to either paste and tape like sheetrock or seal with poly urathane caulk sealant? Thanks.

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Old 01-25-2013, 11:27 AM   #2
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Ive cut it with a utility knife if its a straight line. Score it a few times and snap it like drywall. You'll go thru quite a few blades though. Other cuts use a 4" angle grinder with a diamond blade. Round cuts can be made with a diamond hole saw on your cordless drill.

Is this going on a wall or floor? Wet area?

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Old 01-25-2013, 11:55 AM   #3
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going around bath/shower area. dont have any grinders or saws other than hand saw.
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Old 01-25-2013, 12:04 PM   #4
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Are you talking about a hand saw that you would use to cut wood? Your concrete board will probably crumble while you are cutting it with a hand saw. Angle grinders are pretty inexpensive 20-40 bucks at most. Diamond blade for 20 bucks. Make sure you get a dusk mask and cut it outside. Or use some water to keep the dust down.

The first time I did it I used mostly the utility knife and some tile snips. It took me forever.

How are you planning on waterproofing the area before you tile?
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Old 01-25-2013, 12:05 PM   #5
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Plus everyone needs new tools!!!!
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Old 01-25-2013, 12:55 PM   #6
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What kind of board. Hardie makes a blade for a circular
saw. Dusty but fast.
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Old 01-25-2013, 01:00 PM   #7
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One of these will work better and last longer then a utility knife.
http://www.bing.com/images/search?q=...electedIndex=1
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Old 01-25-2013, 02:40 PM   #8
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One of these will work better and last longer then a utility knife.
http://www.bing.com/images/search?q=...electedIndex=1

Yep just score it many times and use a straight edge. Angle grinder with diamond blade worked the best though.
Use tape that is sold on the tile aisle and mud with thinset. How are you waterproofing? Polly behind the board or a roll on barrier?
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Old 01-25-2013, 06:00 PM   #9
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For tape use yellow alkali resistant mesh. Thinset is your mud. Years ago Hardi suggested using a carbide blade on a circular saw as one method to cut their cement board. It created a lot of dust and probably a lot of claims for damages due to respiratory illnesses. The last time I checked using a circular saw was not recommended. I still cut it that way but I wear a top quality respirator and I do it outside. The score and snap method takes more work but is probably safer and Hardiboard is rough on carbide blades. In spite of what I wrote, my advice is to follow the directions of the manufacturer to avoid any risk to your health.
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Old 01-25-2013, 06:47 PM   #10
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Your trying to do a bathroom remodel and tile job but own no tools. Hmm.
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Old 01-25-2013, 06:56 PM   #11
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Okay everyone,
I am remodeling my bathroom. Tore out all sheetrock and tile around bath tub/shower and the rest of the bathroom.
Insulated all walls with R19 and put up sheetrock except around tub area. Have the insulation in the wall around tub.
Have put 4" flashing around tub since tub has no lip and lower on the wall side. Sealed that with poly sealant. Nailed the flasing to the studs.
Now ready to put cement board around tub. Have already taped and floated sheetrock. Now that is ready for sanding.
I think I need to use the poly caulk sealant after the cement board is installed. And I guess it is best to take it (cemenmt board) back to Home Depot and let them cut it to the measurement that I need. Right I dont have any power tools. And the saw I was going to use was a hack saw. Someone earlier suggested that I use a small drill and put holes in a straight line then saw. So I am trying to this correctly. I dont have a man around to this for me so I am doing the best I can.
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Old 01-25-2013, 07:21 PM   #12
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Originally Posted by rsc1003 View Post
Okay everyone,
I am remodeling my bathroom. Tore out all sheetrock and tile around bath tub/shower and the rest of the bathroom.
Insulated all walls with R19 and put up sheetrock except around tub area. Have the insulation in the wall around tub.
Have put 4" flashing around tub since tub has no lip and lower on the wall side. Sealed that with poly sealant. Nailed the flasing to the studs.
Now ready to put cement board around tub. Have already taped and floated sheetrock. Now that is ready for sanding.
I think I need to use the poly caulk sealant after the cement board is installed. And I guess it is best to take it (cemenmt board) back to Home Depot and let them cut it to the measurement that I need. Right I dont have any power tools. And the saw I was going to use was a hack saw. Someone earlier suggested that I use a small drill and put holes in a straight line then saw. So I am trying to this correctly. I dont have a man around to this for me so I am doing the best I can.
Now I'm confused, how does drywall come into play? Sure hope you did not use it behind the tile board.
Wrong tub if there's no lips one the back sides.
Really need a picture to try and figure out what it is your trying to do.
No box store I know of is going to cut the tile board for you.
A hack saw is for cutting metal and drilling a row of holes is not even close to the right way to do this.
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Old 01-25-2013, 08:11 PM   #13
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Now I'm confused, how does drywall come into play? Sure hope you did not use it behind the tile board.
Wrong tub if there's no lips one the back sides.
Really need a picture to try and figure out what it is your trying to do.
No box store I know of is going to cut the tile board for you.
A hack saw is for cutting metal and drilling a row of holes is not even close to the right way to do this.
Now I'm confused, how does drywall come into play? Sure hope you did not use it behind the tile board.
Wrong tub if there's no lips one the back sides.
Really need a picture to try and figure out what it is your trying to do.
No box store I know of is going to cut the tile board for you.
A hack saw is for cutting metal and drilling a row of holes is not even close to the right way to do this.
no I did not use it behind the cement board around the bath tub area.
The tub is the original tub installed in house. It has about an 1/8" lip but that is really not sufficient since the tub is lower by about a 1/2" on the wall side. I am not physically strong enough to replace the tub.
I dont know of any other way to cut cement board other than taking it back to home depot and having them do it. But you say that they wont do that for you. So I'll have to call them and find out. Like I said earlier I am trying to do the best that I can by myself. I live in Houston and contractors are really trying to screw me on the prices of everything and some of them wanted to put sheetrock behind the cement board. Not one of them said anything about the flashing on the low side. So I am trying to get the best info I can to proceed. Thats why I signed up on this website. And I do appreciate the help that I am getting here.
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Old 01-25-2013, 09:03 PM   #14
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Use denshield.
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Old 01-25-2013, 11:24 PM   #15
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Instead of using heavy, hard to cut cement board, consider using Kerdi-Board. Light, easy to cut, and waterproof if you follow the directions and take care of the seams. Plus, it is the perfect substrate for tiles.

http://www.schluterkerdiboard.com/

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