Tile Mountain
Go to the top of page

12mm HardieBacker Board 1200x800

Size 800x1200mm
SKU: 445680
In Stock
£18.95 m2
How many do I need?
£18.19 inc VAT


Get the best protection against moisture damage when you use HardieBacker® tiling backer board; the floor tiling backerboard of choice wherever superior performance is required.

Key Features

  • 90% Portland cement and sand construction
  • No loose aggregate or filler
  • Highest flexural strength and up to three times the compressive strength of competitive cement board
  • Easy to cut to any size: just score and snap
  • Clean cuts allow edges to align tightly
  • Less dust and debris when cut
  • Unique formulation with MouldBlock Technology provides outstanding mould and moisture resistance
  • Excellent heavy tile adhesion

Use the durable, mould and water-resistant alternative to plasterboard for tiling on walls. HardieBacker® 12 mm thick cement backerboard with MouldBlock Technology for tile and stone doesn’t swell, rot or warp, so that your tiling work stays put. HardieBacker® 12 mm is strong: boasting the highest flexibility and up to 3x the compressive strength compared to competitive boards. HardieBacker® fastens directly to any floor, wall or wooden frame and lines up perfectly with any dry wall, making it particularly quick and easy to install. Use HardieBacker® 12 mm on the floor when additional height is needed. Its fire resistant properties also make it the ideal choice of wall panelling behind a boiler, or even behind a multi-fuel or wood-burning stove.


Product Details
Product Guides
  • SKU 445680
  • Tiles Per Square Metre 1.04
  • Weight 20.00 KG
  • Height 1200
  • Width 800

Product Reviews

Matt 05/05/22

Backer board was great to use, arrived promptly with a bulk order, all intact and felt delivery driver did a fantastic job getting it to me

Verified Buyer

Thomas C. 05/04/21

Excellent backer boards, order arrived

Excellent backer boards, order arrived on time well packed. Would surely be back to order for next projects

Verified Buyer

Sabah A. 22/03/21

used to cover plumbing works

used to cover plumbing works

Verified Buyer

Kevin N. 21/03/21

Best Prices for Cement backed

Best Prices for Cement backed board in the West Midlands very helpful people on any of their products would use them again Tile Mountain are a 5 star company.

Verified Buyer

Sarah K. 04/03/21

Great price

Best online price for these - highly recommend

Verified Buyer

Richard G. 15/01/21

Spot on for the job

Spot on for the job

Verified Buyer

Ian R. 15/11/20

Backing Board

Makes laying tiles so much easier when you can lay these down flat and good adhesive backing for the cement.

Verified Buyer

MARK P. 27/09/20

Hardie Backer board

I was advised to use James Hardie Backer board for my bathroom tiling. I looked around and Tile Mountain were the most competitive. The boards were promptly delivered as arranged and well packed on a small pallet - delivered right outside my front door! The driver was helpful and I even got messages & a phone call to advise me on time of delivery - spot on! The Hardie board was easy to cut and took the tiles well - very pleased. Great service, highly recommend.

Verified Buyer

Read More Reviews:

Anonymous 23/09/21

Would this be suitable to increase the thickness of porcelain tiles under a log burner?


Our advice: This backer board would give you an extra 6mm depth underneath your tiles. It is suitable to be used under a log burner.

Thomas 21/01/21

Do I need to tank and prime hardie backer boards?


Our advice: Yes, if using this in a shower area, you can use our Waterproofing kit. https://www.tilemountain.co.uk/p/mapei-shower-waterproofing-kit.html

Simon 13/01/21

Please advise if I should use 6mm or 12 mm hardie backer boards on my bathroom walls ready for tiling etc.


Our advice: We recommend the 12mm Hardie Backer Board for the bathroom wall.

Steve 27/08/20

can this be installed direct onto brick wall ?? if so what kind of adhesive is needed cheers steve


Our advice: Hi Steve, thank you for your question. The HardieBacker Board can be installed directly onto a brick wall. Adhesive is not needed to secure this to your walls, just screws.

Dan 07/06/20

Can the board be installed instead of floor boards on floor joists and also take the weight of a bath tub?


Our advice: Unfortunately no, the HardieBacker board would need to be installed on top of floorboards. We would recommend using 6mm HardieBacker Board 1200x800 SKU: 445675 for the floor.

Gareth M. 17/04/20

Would this be suitable to use outside?


Our advice: We would not recommend using these boards externally.

Henry P. 07/09/19

Does hardiebacker require a bed of tile adhesive as well as screws when fitted to wooden floor


Our advice: There is no adhesive required for fitting Hardie Backer Boards, just screws. Many Thanks

Read More Q & A: