Model # 220023

Internet #100170507

Store SKU #202225

James Hardie HardieBacker 3 ft. x 5 ft. x 0.42 in. Cement Backerboard

James Hardie

HardieBacker 3 ft. x 5 ft. x 0.42 in. Cement Backerboard

  • Lightweight structure that offers strong bonding properties
  • Ready for wallpapering, tiling, painting, or texturing
  • Protects your underlayment against moisture and mold
$13.87 / each
If you buy 30 or more
$12.48 / each

Frequently Bought Together

Product Overview

HardieBacker cement board is a tile underlayment made for wet areas like kitchens and bathrooms. This cement-based backer board, made of 90% Portland cement and sand, resists damage from moisture and mold and provides excellent tile adhesion. Its formulation and structure results in the ideal combination of strength, uniform composition and performance that no other backer board can provide. HardieBacker cement board was made to be easier to work with so that regardless of how you cut your board, the result is less debris. HardieBacker cement board's superior strength and durability delivers a solid foundation for tile jobs to help protect your work and reputation. James Hardie stands behind HardieBacker cement board with a limited lifetime product warranty.

California residents: see   Proposition 65 information

  • Most preferred brand of BackerBoard by Tile Installers and Contractors
  • HardieBacker 500 cement board (0.42 in. thick) is best used for walls, ceilings and floors
  • Made better - the 90% portland cement and sand formulation provides a solid foundation for your tile with up to 3 times the compressive strength of competitive board
  • Installs better - cuts cleaner for tighter seam lines and less debris
  • Performs better - unique formulation delivers a product with outstanding resistance to moisture and mold
  • Score and snap the board by making 2-3 passes with a utility knife or a carbide tipped blade, place one hand and knee firmly along the score line, then use the opposite hand to pull the board up
  • Cut HardieBacker cement board with snapper shears instead of a grinder for the same clean, sharp edges for straight seam lines while significantly reducing the amount of dust in your work environment
  • Limited lifetime product warranty
  • Non-combustible

Info & Guides

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Customer Questions & Answers

I need to cut out for a niche in the shower...

I am not aware of any way to score and break. Is there a way to hand-cut or an approved power tool?
Asked by: Baltimore1000
Score and break works just fine. Score your opening and then an then an X from corner to corner. Be sure to support the backside of the board with some scrap 2x material along the anticipated opening. Use a framing hammer or similar to punch out the hole. I start near a corner and hold the hammer with a twist so the the edge of the face strikes near the score line and just work around the score lines until you have an opening. Using this method, you will have a rough edge to clean up. Generally I just use an old carbide blade in the skil saw and plunge into the cut. WEAR YOUR PPE - EYES, EARS, AND RESPIRATORY and work outside.
Answered by: Wojo
Date published: 2017-05-03

Why is this only .42" thick?

I'd like to use this Hardibacker behind the tiles around my tub. I removed the bottom row of tiles and cement board that was 1/2" thick. Why is Hardibacker only .42" thick, when most Sheetrock, green-board + cement boards are a full 1/2"? Do I use two 1/4" pcs. (to get back to a 1/2" base) or what else can I do to make up for the roughly 3/32 less difference in thickness, so the newly set tiles will be level with existing tiles?
Asked by: lovinNC
In addition to the other answers here that discuss making up the difference with thinset mortar, there will also be some space taken up by a waterproof coating such as 2 or 3 coats of Redgard. The Redgard might account for 0.025-30". Not sure of exact thickness but it is recommended to apply .045" wet thickness in one application brochure. It dries thinner but I didn't see by how much. I had a similar situation and the Redgard plus back buttering the tiles along with some thinset on the backerboard makes up the difference very quickly. Yes, you really should a waterproofing on backerboard all over and NOT just on the seems as you might see some so-called Pros doing in YouTube videos.
Answered by: engr4you
Date published: 2017-05-22

I want to use this as substrate for a mosaic table top. Is it strong enough or will it need to be supported underneath.

Table top will be round 30 inch diameter. It will need to be cut
Asked by: MD
16 inches is the maximum recommended "span" or distance between joists and that's on a vertical application, which generally doesn't see much of a deflection load. For long-term success of your project I recommend that you provide a) a proper framework for the tabletop and b) something like 3/4 inch plywood or "Advantech" between your frame and this backer. Alternatively, you could use more intermediate pieces to something like a hex frame. While a small amount of overhang might not be an issue, you don't mention anything about what the edge of the table will look like. That makes it very tough to give you the proper advice. Just a 0.42" raw edge or painted edge with mosaic on top doesn't seem like a good idea but I might be missing something about the design you envision.
Answered by: engr4you
Date published: 2017-02-13

Approximately how many screws per board are required?

How many screws per board for a floor application over 3/4" CDX with thinset between? How many screws per board for a wall application (direct to studs)? And, is any adhesive recommended to bond it to the studs? Intending to use the backer-on screws unless drywall or decking screws will also offer acceptable performance.
Asked by: MightyMouse
Answered by: MMS1956
Date published: 2017-02-22
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Customer Reviews

HardieBacker 3 ft. x 5 ft. x 0.42 in. Cement Backerboard is rated 4.0 out of 5 by 50.
Rated 5 out of 5 by from Ardex 8+9 vs Redgard waterproofing experience on HardieBacker. HardieBacker is the best cement bo... Ardex 8+9 vs Redgard waterproofing experience on HardieBacker. HardieBacker is the best cement board on the market. It's solid and it doesn't crumble easily like other brands. It can be cut easily with the proper tools and techniques. I wanted to share my experience when I tried to waterproof it. First, I used RedGard without doing a research because I trusted all the good reviews about it. I followed the instruction and used it on Hardie cement board. After a few days, I checked on it and I was so surprised to find out that I could peel off some areas just like peeling off an old paint. I contacted their customer service and they recommended to apply a primer coat prior to two full coats. Their recommendation wasn't even on the product label and It was clearly not a user mistake. I had to spend a few hours to peel it off from the shower wall on a small bathroom size. No refund/replacement. I bought Ardex 8+9 waterproofing compound online and hoped that it would work based on some suggestions for Hardie cement board. WOW! It was a huge different compared to RedGard. It sticked really well on Hardie cement board. It even sticked on my t-shirts, pants, and other materials. The smell was not as strong as RedGard. The dark grey color was nice too compared to RedGard bright red color. The most important different was the texture. The dried membrane had a rough texture good for bonding with cement. RedGard had a smoother soft plastic-like texture. I would highly recommended Ardex 8+9 on Hardie cement board. Their customer service was fast and helpful when I called them for some questions. Do a research before buying some products from Home Depot.
Date published: 2016-12-01
Rated 5 out of 5 by from I used this Hardie Backer .42" today and cut it with a cement board circular blade, CMT 7-1/4" Fi... I used this Hardie Backer .42" today and cut it with a cement board circular blade, CMT 7-1/4" Fiber Cement Blade, Model Number: 236-004-07, $44.99 using a dust mask outdoors and it cut like a dream. I have tried cutting other brands with scoring with a knife and had the same results as most people. This product did not crack and chip like Durrock. I found the exact Hardie recommended screws at HD with the self counter-sinking heads and I hope and suspect they will do better then the generic screws I have used in the past. Do not like the idea of roofing nails since they have no holding power whats so ever. I suggest using a impact driver and hardbacker screws.
Date published: 2016-12-17
Rated 5 out of 5 by from The best cement board out there I have been using hardibacker since it came out . Hands down the best on the market. I have had 0 warranty issues in 20 years. If your not dumb use a grinder with a diamond blade to cut it or even better the Dewalt shears. Its true its not really a score and snap product like that garbage durock or wonderboard I dont even install it to manufacturer specs. I never put thinset under it and I use 7/16 crown staples . It is also true the 1/2 inch is not a true half inch but if you are setting tile with a 3/8!trowel it makes upnthe difference. Good luck kids
Date published: 2017-01-24
Rated 2 out of 5 by from Used this product on a bathroom remodel job where I was installing a 30x60 shower base and cerami... Used this product on a bathroom remodel job where I was installing a 30x60 shower base and ceramic tile. This board is almost impossible to cut with a utility knife as suggested. If you need to cut anything less than 6/7/8" off forget it. It just will not cut properly. I ended up scoring about 10 times and then breaking off with a pair of pliers. To drive the screws through the product is extremely difficult. Predrilling is probably a good idea. Some reviews talk about cutting with power saws grinders etc. the manufacturer strongly discourages cutting this way as the silica powder can cause disease that can be fatal. I would never use this product again unless I did not have to cut. They also claim it's lightweight, not a chance. The Hardie screws are poor quality and the heads strip easily.
Date published: 2017-02-22
Rated 5 out of 5 by from I have been installing tile for twenty plus years...hands down this is the most reliable underlay... I have been installing tile for twenty plus years...hands down this is the most reliable underlayment. Yes it is difficult to cut; scoring and snapping will do 90% of the cutting necessary; grinder with a diamond blade and a dust mask will take care of the intricate cuts. In testing I have left scrap pieces outside exposed to the elements for over two full years (sun, rain, snow, temperature changes) and nothing negatively effects it; my micrometer reads it the same! I always mortar and screw it down when installing over the floor, and waterproof my niches and seams when installing in a wet area. Using the newly designed T-25 head screws make all the difference when installing. This product blows away the competition.
Date published: 2017-04-25
Rated 5 out of 5 by from Best Board in the Market I have been in the industry for 35 years and I find this board to be the easiest to work with, strongest and best for mold and moisture. I tried all the other cement boards like Durock and Wonderboard, yet, those are messy, less than 50 % cement, hard to cut, and get mold through time. For all those out there, HB can be cut with a utility knife indoor - snap and score ( popping the board up instead of down like dry wall), you can hammer the board and it won't deteriorate, make sure to wet the board to get the best adhesion to tile, and put an additional layer of versabond to match the drywall. Holes are easy to perform as well. I GET 0 CALL BACKS WITH THIS BOARD and NO MOLD OVER THE LIFETIME OF MY INSTALLATION. BEST RETURN ON INVESTMENT FOR SECTION 8 BUILDERS CONCERN ABOUT MOLD.
Date published: 2012-12-03
Rated 4 out of 5 by from works well on bouncy floors, and is a snap to cut. cheaper at other places. works well on bouncy floors, and is a snap to cut. cheaper at other places.
Date published: 2017-01-11
Rated 1 out of 5 by from 1 Star Review Rating provided by a verified purchaser
Date published: 2017-04-21
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