Question: Does Hardibacker Need To Be Waterproofed?

Does Hardie board need to be waterproofed?

James Hardie HardieBacker Cement Board with HydroDefense Technology is a waterproof cement backerboard designed for use on walls, floors and countertops.

Waterproof composition throughout entire board saves cost by eliminating the need to apply a separate waterproof coating across the surface of the board..

Do you need a vapor barrier behind Hardibacker?

Hardibacker doesn’t need a vapor barrier or waterproofing except you do need to tape and thinset the joints.

Is HardieBacker waterproof?

HardieBacker® Cement Board with HydroDefense™ Technology is a long-lasting, waterproof solution for walls, floors, and countertops. WEIGHT: 2.6 lb/sq. … †Some application areas, such as shower pans, may require additional waterproofing.

Does it matter which side of Hardibacker faces out?

Which side goes up, smooth or rough? Either is acceptable, but we recommend that the smooth side with the nailing pattern of every 8″ on center go up. What subfloor should HardieBacker® cement board be installed over?

Can you put Redgard over Thinset?

From what I have read, the premixed thinset does not dry out to form a good adhesive bond when applied over/under a non-permeable membrane like Redguard or the Kerdi-band products. The dry mix (where you add the water on-site) does.

What thickness Hardibacker should I use?

We recommend 1/4 in HardieBacker® board for floor applications, unless 1/2 in thickness is needed for transition.

Can you use joint compound on Hardibacker?

Texture can be applied to HardieBacker board in the same way as drywall. Use drywall joint compound, not thinset. If finishing to a smooth wall, i’d skim coat the entire board.

Does 100% silicone stick to Redgard?

Caulk that gap with siliconized or latex caulk and then use Redgard over the caulk. Regard will not stick to 100% silicone caulk. You DO NOT want moisture collecting in that crevice and it can if you stuff it with thinset.

Which is better durock or Hardibacker?

Durock cement boards are more textured thus they are easier to apply. The texture allows the cement board to stick more firmly because of the friction between the adhesive and texture. HardieBacker cement boards also adhere firmly but lesser than Durock cement boards because they have a smooth surface.

Do you need to seal Hardibacker before tiling?

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.

What’s better redguard or Aquadefense?

One major difference if you do your research online is that Redgard is certified for use in steam rooms and as a vapor barrier whereas Hydro-ban is not. Both have the certification for pan liners and waterproofing, but Redgard outperforms Kerdi membrane (not Kerdi DS) in Perms of vapor penetration.

Do you have to tape seams on Hardibacker?

For tile backer boards such as Durock, Wonderboard, Hardiebacker, Permabase, and others the seams between the board need to be treated with 2-inch alkali-resistant mesh tape. Then a coat of thinset gets flat troweled over the seam.

Do I need RedGard on Hardibacker?

Similarly one may ask, do I need redguard on Hardibacker? As long as it’s Cement Board & not some crappy “almost” cement board stuff. You really don’t need the RedGard, but the more protection the betterso go for it. And yes, you can do the boards beforehand.

Can you tile straight onto HardiBacker?

The Hardibacker will be fine to tile straight onto.

Should I put plastic behind cement board?

A moisture barrier is necessary with any cement board product. If you do not have plastic or roofing felt behind it, then a liquid-applied membrane is in order. Durock is indeed waterproof, meaning it is not harmed by water.

Can you tile directly over RedGuard?

You”ll be fine with thinset over Redguard on walls. It’s recommended for waterproofing niches, shelves, and entire shower walls when tar paper or poly are not used as a vapor barrier behind the CBU.