R
Rich
Good evening all. A little bit of info on HardieBacker board, I got a new key board today and wanted to try it out so if there any any spelling mistakes that will be why. Anyway hope this is helpful to a few people. 
How to install HardieBacker 250 cement board
Foundation
Ensure floor satisfies requirements of local building regs and does not deflect more than 3mm over 400mm. Excessive flex may cause tiled floor to crack.
Preparing the substrate
Check tha the floor is suitable for use. Repair or replace any loose, warped or damaged parts of the sub-floor. Clean the floor with a brush to remove any site dust to promote adhesion of the tile adhesive bed.
Step 1. Preparing the bed for the HardieBacker
HardieBacker 250 cement board is bedded into a tile adhesive compound. The tile adhesive levels out any minor deviations to allow for a well supported even tile backer substrate. Spread the tile adhesive across the floor with a 6mm notched trowel. Make sure that only enough tile adhesive is spread out for a sheet at a time. Applying too much adhesive may result in the adhesive drying to fast.
Step 2. Installing the first sheet
Sheets must be laid with a 3mm gap from all walls, vanities, baths ect. Sheets are then pressed into the bed of tile adhesive. Install with EZ-grid face up. Note: The adhesive is used as a gap filler only and is not required to attach HardieBacker to the sub-base - this is carried out by the application of the mechanical fixings.
Step 3. Fixing sheets
Sheets are nailed through the body of the board (there are marker guides on the EZ grid to help you) and around the perimeter at 200mm centres. Fixing 15mm from the edges and 50mm from corners of sheets. Fixings can be either 30mm galvanised roof nails or HardieBacker screws.
Step 4. Subsequent sheets
Subsequent sheets are fixed in the same method. Remember to lay the sheets brocken bond or brick patters.
Step 5. Preparing the joint sheets
Wipe down boards with a damp sponge to remove site dust.
Step 6. Sheet jointing and taping
The joints are then reinforced to provide a more consistant substrate. Aplly the tile adhesive to joints of HardiBacker with a spatula then enbed 50mm alkaline resistant tape into the tile adhesive.
Step 7. Finishing joint
Apply a final layer of tile adhesive feathering joint out to a width of approximately 150mm. Ensure there is no obvious ridge of adhesive as this may affect the final tile finish.
Step 8. Ready for tiling
Install tiles
How to install HardieBacker 500 cement board
Foundation
Ensure wall framing is straight. HardieBacker will not correct un-even stud walls. James Hardie recommends a maximum of 3mm to 4mm deviation. Framing should be at no more than 400mm centers.
Step 1 Fixing sheets
Sheets are nailed to each stud at 200mm centers. Fixings are 15mm from edges and 50mm from the corner of sheets. Fixings for timber studs can be either Hardi screws or 30mm galvanised roofing nails. Install smooth side up.
Step 2 Subsequent sheets - layout
A quick tip may be to use the off cut from the last board on a wall to begin the next sheeting of boards.
Step 3. Preparing to joint sheets
Wipe down boards with a damp sponge to remove site dust.
Step 4 Sheet jointing and taping
The joints are then jointed and reiforced to provide a more consistant substrate. Apply tile adhesive to joints with a spatula then embed 50mm alkaline resistant FibaTape into tile adhesive.
Step 5 Finishing joint
Apply a final layer of tile adhesive feathering joint out to a width of approximately 150mm. Ensure there is no obvious ridge of adhesive as this may affect the final tile finish.
Step 6. Finishing wall and floor details
Fill joints between floors and walls with a hight quality wet area silicone sealant.
Step 7. Ready for tiling
Install tiles.
Floors and adjoining walls
Sheets should be 6mm above the finished floor surface to allow for any setting of the frame or movement. Sheets should also have a 6mm gap from sheet face to adjacent walls and from floor level to allow for movement.
Araes exposed to water
When HardieBacker boards are installed behind showers you will need to install a PE membrane sheet to assist in the prevention of water ingress. Corners of walls should also be flashed wil a PE flashing or similar.
Cutting the sheets - score and snap
Sheets are easily cut using a score and snap knife. HarieBacker 250 boards are are scored about 3 times to create a groove of 1.5-2mm, the board is then pressed upwards snapping the board at the score and snap line. HardieBacker 500 boards are scored about 6 times to create a groove of 3-4mm, the board is then snapped up wards at the score and snap line.
How to install HardieBacker 250 cement board
Foundation
Ensure floor satisfies requirements of local building regs and does not deflect more than 3mm over 400mm. Excessive flex may cause tiled floor to crack.
Preparing the substrate
Check tha the floor is suitable for use. Repair or replace any loose, warped or damaged parts of the sub-floor. Clean the floor with a brush to remove any site dust to promote adhesion of the tile adhesive bed.
Step 1. Preparing the bed for the HardieBacker
HardieBacker 250 cement board is bedded into a tile adhesive compound. The tile adhesive levels out any minor deviations to allow for a well supported even tile backer substrate. Spread the tile adhesive across the floor with a 6mm notched trowel. Make sure that only enough tile adhesive is spread out for a sheet at a time. Applying too much adhesive may result in the adhesive drying to fast.
Step 2. Installing the first sheet
Sheets must be laid with a 3mm gap from all walls, vanities, baths ect. Sheets are then pressed into the bed of tile adhesive. Install with EZ-grid face up. Note: The adhesive is used as a gap filler only and is not required to attach HardieBacker to the sub-base - this is carried out by the application of the mechanical fixings.
Step 3. Fixing sheets
Sheets are nailed through the body of the board (there are marker guides on the EZ grid to help you) and around the perimeter at 200mm centres. Fixing 15mm from the edges and 50mm from corners of sheets. Fixings can be either 30mm galvanised roof nails or HardieBacker screws.
Step 4. Subsequent sheets
Subsequent sheets are fixed in the same method. Remember to lay the sheets brocken bond or brick patters.
Step 5. Preparing the joint sheets
Wipe down boards with a damp sponge to remove site dust.
Step 6. Sheet jointing and taping
The joints are then reinforced to provide a more consistant substrate. Aplly the tile adhesive to joints of HardiBacker with a spatula then enbed 50mm alkaline resistant tape into the tile adhesive.
Step 7. Finishing joint
Apply a final layer of tile adhesive feathering joint out to a width of approximately 150mm. Ensure there is no obvious ridge of adhesive as this may affect the final tile finish.
Step 8. Ready for tiling
Install tiles
How to install HardieBacker 500 cement board
Foundation
Ensure wall framing is straight. HardieBacker will not correct un-even stud walls. James Hardie recommends a maximum of 3mm to 4mm deviation. Framing should be at no more than 400mm centers.
Step 1 Fixing sheets
Sheets are nailed to each stud at 200mm centers. Fixings are 15mm from edges and 50mm from the corner of sheets. Fixings for timber studs can be either Hardi screws or 30mm galvanised roofing nails. Install smooth side up.
Step 2 Subsequent sheets - layout
A quick tip may be to use the off cut from the last board on a wall to begin the next sheeting of boards.
Step 3. Preparing to joint sheets
Wipe down boards with a damp sponge to remove site dust.
Step 4 Sheet jointing and taping
The joints are then jointed and reiforced to provide a more consistant substrate. Apply tile adhesive to joints with a spatula then embed 50mm alkaline resistant FibaTape into tile adhesive.
Step 5 Finishing joint
Apply a final layer of tile adhesive feathering joint out to a width of approximately 150mm. Ensure there is no obvious ridge of adhesive as this may affect the final tile finish.
Step 6. Finishing wall and floor details
Fill joints between floors and walls with a hight quality wet area silicone sealant.
Step 7. Ready for tiling
Install tiles.
Floors and adjoining walls
Sheets should be 6mm above the finished floor surface to allow for any setting of the frame or movement. Sheets should also have a 6mm gap from sheet face to adjacent walls and from floor level to allow for movement.
Araes exposed to water
When HardieBacker boards are installed behind showers you will need to install a PE membrane sheet to assist in the prevention of water ingress. Corners of walls should also be flashed wil a PE flashing or similar.
Cutting the sheets - score and snap
Sheets are easily cut using a score and snap knife. HarieBacker 250 boards are are scored about 3 times to create a groove of 1.5-2mm, the board is then pressed upwards snapping the board at the score and snap line. HardieBacker 500 boards are scored about 6 times to create a groove of 3-4mm, the board is then snapped up wards at the score and snap line.
