Q:i am putting tile on my tub surround walls, and will be using cement board! the sheet rock that is on there is not leveled,is there a trick to make the cement board leveled and plum when i apply it??? please help

Use a level and if the wall isn't plumb you'll have to cut long tapered shims to correct it, nailed on the studs underneath of the cement board.

Q:I want to install ceramic tile in my kitchen. My subfloor consists of 2x8 on 16 centers with 1/2 5 ply plywood. Will it be OK to lay 1/2 cement board directly on this or do I need to some how increase the strength of the subfloor? Any recommendations.

you could do that and MAYBE not have a problem. but if it was me, the 1/2 would come out and 3/4 would replace it. i have done a few jobs for people that dont want to replace the 1/2 and didn't have any problems with the tile or grout lines cracking. its just up to you really. if there is ANY give at all on you floor right now, id replace the 1/2.

Q:why does concrete block crumble but driveways and sidewalk do not?I don't have a driveway so basically i want to build a flat portable surface, made out of cement that my jack-stand (for my car) can stand on so the jack-stand wont have to be put directly in the grass.I would need it for the time that i need to take the tires off. any suggestion?

your putting too much stress on the block if its crumbling

Q:I want to cut off a lip of about 1/8 by 1/2 to accomodate the upper lip of a tub. I plan to do this with several passes of an abrasive wheel in a circular saw set to 1/8. My question is will I be able to machine the board like this or will I get a crumbling mess? the Hardiback is 1/2.

Hardibaker peels like an onion in layers. We use it half thick often and we just cut it to size and then using a razor knife pushed in between the layers and pull them apart like opening a peanut butter sandwich. This may help you. If you run that saw on the line where you need the lip to start on the board then use your knife to split the layers and peel them down to the cut you made. This may be an easier solution then eating away the excess material a little at a time. Good Luck.

Q:I'm installing a stone back splash behind my bathroom sink - 16 SF. The wall is currently painted and I want to make sure that the stone and thinset adhere properly. Should I sand the wall with 80 grit sandpaper and apply the thinset/stone or should I put 1/2 or 1/4 plywood down for better adhesion? Perhaps cement board?

Your tile man is right. The primer may fail and then your tiles will come crashing down. Which costs more, the cement backerboard or the tiles? Why did you paint it? And why did you use drywall compound on the patches? The paint is not compatible with cement, and the drywall compound is just some ground minerals and water or a little vinyl admix. If you can carefully remove the cement board, you may be able to reuse them by flipping them over. Use a stiff scraper and get the compound off the joints, and then the tip of a screwdriver to open the screw heads so you can remove them.

Q:How to install the solution of cement pressure plate

Wood keel plus cement pressure plate: The most construction method, the construction of the most simple, easy. Disadvantages: wood keel in the bathroom humid environment is easy to absorb water, mold, resulting in deformation, so that the chip fried. Remedy: After installation, paste the front of the anti-root tube to do waterproof, to prevent the ground water into the riser, immersed in the wood keel.

Q:ok so im trying to attach the cooling fan to my cpu on my motherboard and i cant find any glue but i did find some patch cement in a road hazard kit, i was wondering if this would work or would my computer fry?

You need thermal paste. You can get a very small tube, enough for 1-3 applications (?) at COMPUSA (or other such place) for under $5. I work on m-boards/processors all the time and know that some kind of adhesive would probably ruin your computer. I've had many heat sinks/fans that would not separate from the processor, and sometimes lift it out of the socket without loosening the arm that tightens it. The kind of damage cant be (easily/cheaply) repaired. Get thermal paste, apply very thin amount to proc, covering the entire (proc) heat sink. Same to heat sink/fan.

Q:do i need mortar under the cement board?

If this is cement board for putting tile on in a bathroom it is not necessary for mortar under the board just screw it to the studs and glue on the tile

Q:How does the cement pressure plate make a large brick? Specific steps and methods?

Brick masonry molding, you must use 108 glue, paste together on the line

Q:Light steel keel cement board is what

Light steel keel cement board refers to the light steel keel-based skeleton of the cement board.