should i use 1/4 or 1/2 cement board
Position the screws at least 12-inch but no more than 2 inches from the edge of the sheet. I know 12 cement board is the spec for shower walls due to the deflection of 14 Hardibacker.
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For example on an installation where one floor covered with thin ceramic tile meets another tiled with thicker tiles.
. If so how close would they need to be. Cement-fiber or similarly reinforced backer board comes in standard 14 inch and 12 inch thicknesses. On the other hand 12-inch board can be a real bear to cut and manage at the job site.
The only reason to use one size over the other is if one thickness will work better than the other. If youre installing backer board in new construction attaching it directly to floor joists opt for 12 inch sheets. When to use 12.
If you have 38 sheetrock use 12 cement board and feather out the joint to approx 10 to 12. For example 14-inch board weighs less is easier to affix to the substrate with either screws or nails and is easier to cut. It should be almost unnoticeable if done right.
Secure Backer Board with Screws. For flooring the backer board should be installed over a 58-inch thick OSB or plywood base. While some experts suggest using 2-inch screws this may be overkill depending.
The reason I ask is that weve got 8 sheets left from our last project and Id like to use them on our upcoming bathroom. Minimum 58 exterior grade. 14 Durock cement board should not be used for wall or ceiling applications.
For thick or heavy metal fixtures use 1 58-inch screws. If the studs are thick or metal opt for 1 58-inch screws instead. Drill cement board screws through the backer board sheets every 6 to 8 inches.
Instead USG provides a detailed construction handbook for using cementboard wherein it advocates using only 12-inch-thick boards. What subfloor should HardieBacker board be installed over. Drive the screws in so that the heads are slightly below the surface of the backer board sheet.
And for walls and ceilings apply 12-inch or 58-inch backer board screwed. With this in mind you should use 1 ¼-inch screws for ½ inch cement board that is attached to wood framing or a similar material. Drywalls are weaker and cant bear too much weight.
For wall or ceiling applications use 12 or 58 Durock cement board. I have a couple very minor soft spots that my wife does not even notice. For countertops use 34-inch plywood beneath the backer board.
Should I use 12. The first and foremost task before you get started is to locate the wall studs. Cement board attached to plywood or similar underlayment will hold with only 1 14-inch screws.
Yes it is that heavy and this means that it usually always takes two people to move lift and install it. Thats why youve to find the wall studs first. In general 1 12-inch galvanized nails will hold the board firmly in place.
This would in turn crack the grout and tiles ruining your work. Especially if its a wall. If youre installing backer board over an existing subfloor 14 inch is sufficient.
Youd need about ¾-inch of screw thread to screw into a 2 x 4. I used 3 screws and Liquid Nails subfloor glue. If you have a piece of cement board and a piece of plywood both of the same size then you can expect the cement board to weigh between 100 and 150 more than the plywood.
12 plywood is for temporary applications exterior sheathing and used as gigantic shims. The cement board is the much heavier of the two. The minimum subfloor specified is 58 exterior grade plywood or 2332 exterior grade OSB subflooring.
I know Hardibacker is not structural but I am thinking 12 would be the better choice. One thing that do-it-yourselfers should consider is the difference in manageability between 12-inch and 14-inch cement board. This is why if you screw cement boards on drywall its likely to break down.
Would it be okay to use 14 if we put extra 2x4s in the wall. Use the thin board under the thick tile and the thick board under the thin. Half-inch cement backer board is ideal for most tiling jobs including walls floors countertops and ceilings.
Locate the Wall Studs. For flooring or wall installation some builders choose to apply a thin layer of thinset mortar under the cement. It does not belong as a floor or a roof.
I am however concerned and contemplating 14 or 12 Hardibacker sheets.
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