Which side of Hardibacker board goes out? Either is acceptable, but we recommend that the smooth side with the nailing pattern of every 8″ on center go up. Does it matter what side of cement board is out? No, it doesn’t matter.
What is an ANSI 118.1?
What is the minimum subfloor thickness for a hardiebacker?
What kind of knife do you use to cut a hardiebacker board?
What is modified thinset?
Can you use structural adhesive on a hardiebacker board?
Can you use liquid nails on tile?
Can you use 1/4" cement board in a shower?
See 4 more
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Siding Installation & Technical Docs | James Hardie Pros
Hardie™ Architectural Collection: Hardie® Plank: Hardie® Shingle: Hardie® Panel: Hardie® Trim: Hardie® Soffit: Hardie® Backer Board
Installation Guide - James Hardie Pros
English | 2 FLOOR INSTALLATION (Interior Application Only) ®We recommend 1/4 in HardieBacker board for floor applications, unless 1/2 in thickness is needed for transition.
Glue or adhesive under Hardibacker? - Fine Homebuilding
You are correct on the hb. I know modifid thinset will stick very well to exterior grade plywood and unless you need the 1/4" to match up the floors I would not spend the extra money. it is around $20.00 for a 3x5 sheet here.
Hardi plank need sheathing? - Fine Homebuilding
Well, yeah. I think it would do a lot for comfort to say nothing of structural help. It would be quieter, a little warmer, less apt to allow pests to make their way in, stronger against vandalism and break-ins, look a lot better if you don't put insulation in for a while, give something to nail or screw into for outside fixtures, help seal around windows and doors.
What is an ANSI 118.1?
Unmodified thinset (ANSI 118.1) or acrylic modified thinset (ANSI 118.4) is specified between the HardieBacker board and the subfloor to eliminate any deviations between our product and the subfloor. This decreases the probability of popping or cracking tiles due to deflection and air pockets.
What is the minimum subfloor thickness for a hardiebacker?
The minimum subfloor specified is 5/8" exterior grade plywood or 23/32'' exterior grade OSB subflooring. HardieBacker board must be installed in accordance with local building codes and the floor must be engineered not to exceed the L/360 deflection criteria, including live and dead design loads, for the specific joist spacing used. HardieBacker board is not designed for use over concrete.
What kind of knife do you use to cut a hardiebacker board?
HardieBacker board may be cut with a carbide-tipped scoring knife (found at Home Depot® and Lowe's® Home Improvement stores), utility knife, or cutting shears (manual, electric or pneumatic). If you use a grinder be sure to cut outside and use a dust reducing circular saw with a Diablo® HardieBlade™ circular saw for more protection use a HEPA vacuum extraction.
What is modified thinset?
The modified thinset used with our product is a fortified cement-based mortar and should specifically conform to ANSI (American National Standards Institute) A 118.4. The thinset can be fortified in a pre-mixed powder form or with a liquid additive.
Can you use structural adhesive on a hardiebacker board?
Where HardieBacker board is being installed directly to wood or metal framing, the use of a structural adhesive in addition to mechanical fastening can be used. However, the board must be forced into the structural adhesive almost immediately upon application to insure that no ridge or crown is formed. The creation of a crown or ridge will result in an additional thickness of mortar being applied to fill in the valley created by the crown. This will require a longer curing time and result in a weaker bond between the tile and the mortar and the underlayment. The use of a structural adhesive does not result in fewer fasteners being required.
Can you use liquid nails on tile?
No. Where HardieBacker board is being installed over a code-complying subfloor for the attachment of tile, the board is installed over a 3/32''-1/4'' thick bed of bonding mortar and then nailed down. ''Liquid Nails'' is not a bonding mortar. It is a structural adhesive generally used to bond the subfloor to the floor joists just prior to nailing. It creates a very solid joint between the surface of the floor joist and the subfloor and aids in reducing floor squeak. The properties of Liquid Nails are such that it is applied via a tube in the form of a bead-like caulking. It is not trowelable like a mortar and therefore results in high ridges with unsupported areas that can deflect under load, resulting in cracked tile.
Can you use 1/4" cement board in a shower?
Yes, HardieBacker 1/4'' cement board may be used in a shower. However, we recommend HardieBacker 500 if you need to make a smooth transition to drywall. The board must be mechanically fastened every 8'' on center to the wood or metal studs spaced a maximum of 16'' on center.
What is an ANSI 118.1?
Unmodified thinset (ANSI 118.1) or acrylic modified thinset (ANSI 118.4) is specified between the HardieBacker board and the subfloor to eliminate any deviations between our product and the subfloor. This decreases the probability of popping or cracking tiles due to deflection and air pockets.
What is the minimum subfloor thickness for a hardiebacker?
The minimum subfloor specified is 5/8" exterior grade plywood or 23/32'' exterior grade OSB subflooring. HardieBacker board must be installed in accordance with local building codes and the floor must be engineered not to exceed the L/360 deflection criteria, including live and dead design loads, for the specific joist spacing used. HardieBacker board is not designed for use over concrete.
What kind of knife do you use to cut a hardiebacker board?
HardieBacker board may be cut with a carbide-tipped scoring knife (found at Home Depot® and Lowe's® Home Improvement stores), utility knife, or cutting shears (manual, electric or pneumatic). If you use a grinder be sure to cut outside and use a dust reducing circular saw with a Diablo® HardieBlade™ circular saw for more protection use a HEPA vacuum extraction.
What is modified thinset?
The modified thinset used with our product is a fortified cement-based mortar and should specifically conform to ANSI (American National Standards Institute) A 118.4. The thinset can be fortified in a pre-mixed powder form or with a liquid additive.
Can you use structural adhesive on a hardiebacker board?
Where HardieBacker board is being installed directly to wood or metal framing, the use of a structural adhesive in addition to mechanical fastening can be used. However, the board must be forced into the structural adhesive almost immediately upon application to insure that no ridge or crown is formed. The creation of a crown or ridge will result in an additional thickness of mortar being applied to fill in the valley created by the crown. This will require a longer curing time and result in a weaker bond between the tile and the mortar and the underlayment. The use of a structural adhesive does not result in fewer fasteners being required.
Can you use liquid nails on tile?
No. Where HardieBacker board is being installed over a code-complying subfloor for the attachment of tile, the board is installed over a 3/32''-1/4'' thick bed of bonding mortar and then nailed down. ''Liquid Nails'' is not a bonding mortar. It is a structural adhesive generally used to bond the subfloor to the floor joists just prior to nailing. It creates a very solid joint between the surface of the floor joist and the subfloor and aids in reducing floor squeak. The properties of Liquid Nails are such that it is applied via a tube in the form of a bead-like caulking. It is not trowelable like a mortar and therefore results in high ridges with unsupported areas that can deflect under load, resulting in cracked tile.
Can you use 1/4" cement board in a shower?
Yes, HardieBacker 1/4'' cement board may be used in a shower. However, we recommend HardieBacker 500 if you need to make a smooth transition to drywall. The board must be mechanically fastened every 8'' on center to the wood or metal studs spaced a maximum of 16'' on center.
