KAYU® Batu (Red Balau) Hardwood Fences & Gates
KAYU® Batu (Red Balau) is a dense tropical hardwood with an independently verified Class A Flame Spread rating on the OSFM Building Materials Listing; applied here to fence and gate assemblies in the 0–5 ft Zone 0 area.
Certification: quoted exactly from the OSFM listing
OSFM Building Materials Listing No. 8110-2069:0001; Listee KAYU INTERNATIONAL INC.
"KAYU® Batu (Red Balau) solid hardwood board, reddish brown color, covers products nominal 1" and thicker x nominal 4" and wider, nominal density of 55.8 lbs/cubic feet"
Class A Flame Spread; Category 8110, Decking for Wildland Urban Interface (W.U.I.)
Date Issued 2026-05-31; Listing Expires 2027-06-30
A separate listee (Tiger Deck, LLC) carries similarly-worded product text under a different listing. We do not conflate the two; this page cites KAYU International's listing only.
How we apply this to fencing; stated plainly:
No California Building Materials Listing category exists for fencing; the OSFM program lists WUI products in categories like decking, windows, siding, doors, vents, and ignition-resistant materials. Firewise applies KAYU® Batu's listed/tested fire-resistance characteristics to fence and gate assemblies based on comparable exposure conditions to listed WUI applications, and we say so plainly rather than implying a fence-specific approval that doesn't exist.
Class A ≠ non-combustible: We do not use "Class A" and "non-combustible" interchangeably anywhere on this page. Class A refers to flame-spread performance in standard tests; non-combustible is a material property. They are different classifications.
OSFM disclaimer: A Building Materials Listing "is not an endorsement or recommendation." We never characterize this listing as OSFM endorsing the product.
Manufacturer-stated facts
All facts per KAYU.
| Density | 60 lbs/ft³; almost 2x denser than Cedar |
|---|---|
| Moisture content | Kiln-dried to 12–14% |
| Warranty | 25-year limited warranty per KAYU (see KAYU for terms) |
| Finish guidance | Messmer's UV Plus oil on all four sides before install, or allow it to weather to silver-gray naturally |
| Natural resistance | Naturally resistant to decay, insects, and mold |
We cite the OSFM listing rather than repeating KAYU's own "Class A (same as concrete and steel)" marketing claim; the OSFM listing is the stronger, independently verified fact.
Offered profiles/dimensions, lead times, and additional product photos: [COMING SOON]
How delivery works
A package means assessment, material specification, and coordination through our network of local licensed contractors, who hold the contract and perform the work. Installation performance is always attributed to the local licensed contractor from our network who holds the contract and performs the work.
Next steps:
Request an estimate or contact us to discuss your parcel.
Product information on this page reflects our understanding as of July 26, 2026; the OSFM listing expires June 30, 2027; flag for re-verification before then. Specs and warranty terms may change. Verify current specs with KAYU or Firewise Fences before ordering.