Internet #100170507

Model #220023

Store SKU #202225

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

  • Tile backer board for countertop, shower and floor installations
  • Underlayment provides foundation for flooring , walls and ceiling
  • Moisture resistant cement board provides excellent tile adhesion
  • See More Details

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Product Overview

James Hardie HardieBacker .42 in. Cement Board is a cement backerboard designed for use with walls, floors and countertops. Use on walls in moisture prone areas, as a tile backerboard and as an underlayment for all tile, vinyl and wood flooring applications. Provides excellent adhesion, resists moisture and features MoldBlock Technology to protect the board against damage from mold. .42 in. thickness provides strength and ease of use on walls, with flooring or countertop projects in bathrooms, kitchens and laundry rooms.
  • California residents
  • Click here to find the best backerboard and underlayment for your project needs
  • Protects project outcome with excellent adhesion
  • Contains no fillers or abrasive aggregate, made with 90% Portland cement and sand for strength, creating a strong foundation for projects
  • Moisture resistant board works in wet areas
  • Score and Snap - easily perform quick and clean cuts indoors using a scoring knife or a utility knife
  • Strong enough for use in commercial or residential applications
  • 3 ft. x 5 ft. Board is .42 in. deep and works on floor, wall, countertop or backsplash applications
  • Consult local building codes for waterproofing requirements before beginning any project

Info & Guides

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Specifications

Dimensions

Drywall Product Thickness (in.)
1/2 in.
Product Length (ft.)
5
Product Thickness (in.)
0.42
Product Width (ft.)
3
Width (ft) x Length (ft)
3x5

Details

Drywall Features
Environmentally Sustainable,Fire Resistant,Moisture Resistant
Product Weight (lb.)
39

Questions & Answers

142Questions30Answers

Can I use hardiebacker to build column bases boxes so I can apply 1" stone on it?

Asked by NM October 5, 2020
1
Answer

Yes however I would use something corser like cement board or a wire lath and mortar scratch coat. You really need something for the stone to hold onto and such a smooth surface is not ideal.

Can I get away without using an actual shower pan line if I have 3/4 plywood and this hardiebacke...

Asked by DK October 2, 2020
3
Answers

I would not, Hardiebacker is a concrete product and therefore absorbs moisture.

Is it true that you cannot use this within 18" from a shower pan? If so, what do you recommend?

Asked by MT September 28, 2020
5
Answers

This is the right product for the walls of a shower. I use mesh tape in the corners and then paint it with Red Guard. Watch a video on how you apply Red Guard. Most guys hold the backer board off the shower pan to prevent water wicking. The pan will hav a rubber liner poured with cement or be fiberglass. Don’t do a shower until you know how to get it right. They are a real pain to fix after the fact. Use a high quality grout and sealer on the tile. I often use drywall screws for spacers on the walls and it holds the tile in position pretty well against backer board. I let the tile dry for 24 hours before removing the screws and grouting. You can use a fan or space heater in n the bathroom to help cure the mortar if it’s cold or humid. Work a small area with the grout until you get used to it and wipe with a clean sponge. Clean the sponge after every wipe to avoid hazing. Let cure for 24 hours then seal. Don’t start until you are confident that you know what you are doing or you are going to have a big mess. Once you start you are committed. Don’t wander off before it’s finished or you will learn about pain at a whole new level.

Which fasteners do you have to use?

Asked by MT September 28, 2020
3
Answers

Thanks for your question. You may use 1 5/8" Backer-On Screws or a 1 1/4" roofing nail to attach this product. Please refer to our installation guide on this product page for further details on a successful install. Good luck with your project!

can this product be used outside as a cultured stone backer - vertical application ?

Asked by Jack September 26, 2020
2
Answers

Exterior use of HardieBacker depends on the climate you live within. Please refer to our Buying Guide under the Info & Guides section of this product page to learn more about using HardieBacker for exterior applications.

can this be used behind a wood stove?

Asked by Lucinda September 1, 2020
1
Answer

Yes you can it is made of cement and fibermesh to keep it together, it is flame resistant.

Do I need to both mortar it AND screw it to 3/4” T

Asked by FX June 9, 2020
4
Answers

I would think that thinset and screws would prevent the backerboard from floating and could contribute to cracking. I've only ever screwed this down.

Can this be used outside under a brick walkway instead of using product sold for under brick pave...

Asked by Frank June 4, 2020
5
Answers

Sorry, it cannot be use in this application. It cannot be use in ground contact or any exterior floor applications.

can you put stainmaster self Adhesive tile directly onto

Asked by joe May 20, 2020
3
Answers

Hardibacker is made for ceramic tile applied with thinset (mortar). There is no information on applying self adhesive tile. Hardiebacker is a rough, dusty cement surface. Self advesive materials need smoother surfaces. It would probably stick but it would probably come off very easily.

Is this good for fire resistance

Asked by Pickle May 11, 2020
3
Answers

It is non-combustible but does not have a fire rating because it transfers heat too fast

HardieBacker 3 ft. x 5 ft. x 0.42 in. Cement Backerboard - page 2

Customer Reviews

  • 635 Customer Reviews
  • 4.6 out of 5 stars overall
89% of customers recommended.
Overall Ratings
5star-icon(460)
4star-icon(117)
3star-icon(17)
2star-icon(20)
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easy to install and cut
Quality :
5
Value :
5
my favorite cement board. It would be perfect if they add a mark line for each 8" it will make screwing the boards in little faster.
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Easier to use than Wonderboard. Goes down faster and easier modify and fit in tight spaces.
Easier to use than Wonderboard. Goes down faster and easier modify and fit in tight spaces.
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the backer board is fine. I used my rotozip to cut it with a diamond blade. easy to cut and handl...
the backer board is fine. I used my rotozip to cut it with a diamond blade. easy to cut and handle. I have never had much luck cutting this stuff with a razor knife.
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Easy to cut and trim. Textures nicely. Used cement boards instead of sheet rock on walls!
Easy to cut and trim. Textures nicely. Used cement boards instead of sheet rock on walls!
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Much stronger than drywall and the 2 different sizes of 1/4" & 1/2" make it easy to fit your show...
Much stronger than drywall and the 2 different sizes of 1/4" & 1/2" make it easy to fit your shower.
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I've used this product in dozens of bathrooms, behind tub and shower walls but this time, I decid...
I've used this product in dozens of bathrooms, behind tub and shower walls but this time, I decided to use it on something totally different. I installed below a few bay windows on an old house, where there had previously been some of that old-fashioned criss-cross, wooden lattice. I took the lattice down because the varmints kept crawling behind there to keep warm at night. They also had a habit of tearing it apart as a way of saying "Than you" for the free nights lodging. So, I decided to use concrete backerboard instead and I painted this boards a flat black with BEHR brand exterior paint. This would not only send out a "No Vacancy" message but it would keep the cold off of the floors in the bay windows in the winter months. This was a very simply and inexpensive fix.
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Exactly what's needed in wet areas or shower units.
Exactly what's needed in wet areas or shower units.
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Durable. Gets the job done.
Durable. Gets the job done.
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We love this product easy to work with this:
We love this product easy to work with this:
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Great product
Great product
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