Because cement board can be used either for floors or walls, the surface below the cement board will vary: In such wet areas, never install cement board directly over drywall or green board. Instead, first, remove the existing surface material, then install the cement board over the studs and membrane, as applicable.Keeping this in view, can I use backer board instead of drywall?
Regular drywall is not appropriate. Many professional installers even recommend against using water- or mold-resistant drywall in high-moisture areas. One solution is to nail cement backer board CBUs over the drywall, tape the seams, and then grout over the cement backer board.
Beside above, can you use 1/4 Hardibacker walls? When butting HARDIBACKER ® sheets to 1/2" drywall, tack 1/4" thick furring strips to each stud. In wet areas, install a moisture barrier (such as 15 lb. roofing felt) between studs and HARDIBACKER ® sheets. Install sheets 1/4" above floor, tub or shower pan.
Moreover, do you need green board behind cement board?
It is used for wet applications in tubs walls, shower walls, and floors. So, remember green board for damp areas but cement board for all areas that could possible come in direct contact with water to ensure the longest life of your bath and tile needs.
Do you have to use thinset under backer board?
Thinset is absolutely required beneath backer-board on a floor. Also, backer-board provides no structural strength at all. You can not install it directly over a 1x subfloor; that is way too thin and will deflect. It does not sound as if you have a quality-minded contractor.
Can I tile directly on drywall?
Sheetrock, or drywall, is no different for tiling over than wood, plaster, cement, or other wall materials. If you are tiling an area that is not in a bathroom, tiles can be applied directly to the sheetrock simply and easily.Can I use durock instead of drywall?
Durock or wonderboard, are a better thickness match than hardi, they are closer to the same thickness as half inch sheetrock, I would definetly go with the redguard, and barely overlap your tile onto the sheetrock for the best look. Even if you have to add a little framing to screw your board too.Do you need to seal Hardibacker before tiling?
To Seal or Not To Seal Contrary to popular thought, tile and grout are not waterproof, and some moisture will penetrate even if sealant is used. If you decide to go this route, no sealant will need to be applied on top of the backerboard, as this could trap moisture between the two layers of waterproofing.Is Hardie backer waterproof?
cement backer board is not waterproof,but water cant hurt it,even when soaked in water for months or even yearsDoes drywall go behind bathtub?
Drywall should not sit directly on the tub as it can "wick" moisture and will eventually fall apart (even green board) if the tub is not kept caulked properly. There is no need for drywall behind the cement board and I have never heard of it being done that way.How much does backer board cost?
A 3 x 5–foot sheet of 1/4-inch backer board costs between $9 and $11; the same-size sheet in 1/2 inch costs about $12 to $14. The one challenge DIYers face when working with cement backer board is how to cut the rock-hard panels. Fortunately, there are a few different options.Is cement board stronger than drywall?
Cement board also comes in panels, but that's where its similarity to drywall ends. Cement board is a very hard panel formed by cement slurry and reinforced fiberglass mesh. It provides a strong base on which to install tile and stone. Cement board is suitable as an underlayment on countertops, walls and floors.Can you tile directly to green board?
You can tile over greenboard sheetrock whether it is in the shower or any other location. To do this, roll on a layer of sealing primer and leave it to dry for 24 hours. After that, you can tile over the greenboard sheetrock in the same manner as you would with any other bathroom tiling.Do you need a vapor barrier behind cement board?
You still need a vapor barrier with cement board, although in this case the barrier can go behind the board. Cement board is heavy enough and breathable enough to take the moisture without a problem. By having the vapor barrier behind the cement board you stop the moisture going further into the wall.Should I insulate behind shower walls?
The insulation behind the tub or shower should be equivalent to the insulation in the rest of the exterior walls and should be covered with an air barrier of cement backer board, rigid foam insulation, or non-paper-faced drywall that is sealed at the edges and seams to provide a continuous air seal.Is Green board the same as cement board?
Because cement board is thicker and heavier than green board, it is harder to install. However, green board and cement board are installed essentially the same way as regular drywall: the panels are attached to floor joists or wall studs with galvanized or corrosion-resistant nails or screws.Can you use green board behind tile in shower?
It means "Greenboard" can still be used in bathrooms (and other areas), it just cannot be used as a backer for tile in a shower or tub surround. It can be used in areas not subject to direct water exposure (tub/shower surround), and areas of noncontinuous high humidity (bathrooms).Can I tile over Sheetrock in a shower?
It will be fine to tile over drywall in low-moisture areas, such as tiling around a fireplace. In areas of high moisture, such as walls in a shower, for long term durability, it is NOT advised to install tile over drywall, even if the drywall is Type MR, moisture resistant.Can I use green board in a shower?
Technically, greenboard and other water-resistant drywall panels can be used in highly wet places. According to ASTM C 1396, Section 7, water-resistant drywall can be used in wet locations such as behind tile in bathtub or shower stalls.Is Green board necessary in bathroom?
Green board is water resistant – it is not water-proof. Green board is highly efficient in bathrooms and kitchens where moisture is frequently in the air, but it is not the drywall that should be set behind tile in your shower or any other areas where it can come in direct contact with water.What thickness backer board should I use?
Cement backer board comes in two standard thicknesses, 1/2 inch and 1/4 inch. The industry standard is to use 1/2-inch-thick backer board on wall tile installations, such as a tub surround.What thickness Hardibacker should I use?
Choose the Right Thickness of HardieBacker You should use 1/4 inch thick HardieBacker for floor tile applications unless 1/2 thick panels are needed for transition purposes between adjacent rooms. 
