Accessories
Question 1
What is the recommended size and grade of steel for HardieFlex® fiber cement board?
Answer
Recommended grade of steel is Grade 60
Depending on the application: minimum flange width of 35mm
for ceilings, use 0.55BMT - 0.75BMT
for partitions, use 0.75BMT - 1.6BMT
Question 2
How many fasteners do I need for one sheet of HardieFlex®?
Answer
| Applications | Size(in mm) | Screws on Metal Frame | Nails on Timber Frame |
|---|---|---|---|
| HardieFlex® ceilings | 1219 x 2438 | 58 | 112 |
| HardieFlex® walls | 1219 x 2438 | 51 | 51 |
| HardieFlex® wet area walls | 1219 x 2438 | 61 | 61 |
| HardieFlex® senepa | 254 or 305 x 2438 | 11 | 11 |
| HardiePlank™ siding | 208 x 3656 | 10 | 10 |
| HardiePlank™ Flooring | 600 x 2400 | 36 | NA |
Question 3
What is the recommended size and grade of steel for HardieFlex® fiber cement board?
Answer
You can either use HardieStop Base Coat or HardieFlex® Putty Jointing Compound to get best results. This must be used along with the HardieFlex® Perforated Paper Tape. Alternatively, you must use an all-purpose two-part epoxy when jointing HardieFlex® Flooring. You may view the full installation details of HardieFlex® Flooring here: http://www.jameshardie.com.ph/... .
Question 4
Can I use gypsum putty, epoxy or skim coat putty for flush jointing HardieFlex® sheets
Answer
No, only HardieStop Base Coat or HardieFlex® Putty Jointing Compound can only be used for flush jointing of HardieFlex® sheets. These were specially formulated by James Hardie™ R & D to work in conjunction with James Hardie™ building products to provide a seamless finish.
Question 5
Can I use gauze tape in the flush jointing of HardieFlex® sheets
Answer
No, it is not recommended to use gauze tape for flush jointing. Use the recommended HardieFlex® Perforated Paper Tape. This was designed to be used in conjunction with the HardieStop Base Coat or HardieFlex® Putty Jointing Compound to achieve the best results.
Question 6
What are the specifications of a nail recommended for installing HardieFlex® fiber cement board?
Answer
Nails must be protected against corrosion and zinc-coated or galvanized with a head diameter not smaller than 6mm, shaft length of 32mm, and shaft diameter of 2.3mm.
Question 7
Can I use gypsum or the black screws to fasten HardieFlex® sheets to light gauge steel frames?
Answer
No, never use gypsum or black screws. Only use HardieDrive Screws. HardieDrive Screws are self-drilling and are fully threaded to firmly secure HardieFlex® sheets to light gauge steel frames.
Question 8
What screw sizes are appropriate for each thickness of HardieFlex® sheet?
Answer
| HardieFlex® Screw Size | HardieFlex® Sheet thickness |
|---|---|
| HardieDriveScrew 20mm long | HardieFlex® 3.5mm & 4.5mm |
| HardieDriveScrew 25mm long | HardieFlex® 6.0mm & 9.0mm |
| HardieDriveScrew 32mm long | HardieFlex® 12mm |
| HardieDriveScrew 32mm long wing-tipped | HardieFlex® Flooring 16.0mm |
| HardieDriveScrew 38mm long wing-tipped | HardieFlex®siding |
| Click here to know more about James Hardie™ accessories | |
Question 9
What is the recommended size of screw for HardiePlank™ siding?
Answer
You must use the HardieDrive Screw 38mm long wing-tippedwith a recommended light gauge steel stud thickness of 0.8mm to 1.6mm BMT . It is specially developed for HardiePlank™ siding.
Question 10
What is the effective coverage of HardieStop Base Coat and the perforated paper tape?
Answer
One kilogram of HardieStop Base Coat has an approximate coverage of 3.7 linear meters while one roll of perforated paper tape can cover at the most 20 HardieFlex® sheets
Question 11
What are the types of paints that can be used for HardieFlex® fiber cement boards?
Answer
The most economical type of paint recommended for HardieFlex® fiber cement boards are water-based (latex) paints. Acrylic, vinyl, and PVA are all water-based paints as well. Acrylic can be used for both external and internal applications. Vinyl and PVA are for internal applications. Oil-based (alkyds or enamel) paints can also be used on HardieFlex® fiber cement boards, although they would cost more than water-based. These types of paint also need undercoats because these paints soak in too far.
Question 12
Do I need to prime HardieFlex® sheets before I apply paint?
Answer
As long as you use the recommended water-based paints, you can directly apply paint to HardieFlex® sheets after all the joints and fasteners have been covered.
