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:
The OSFM Building Materials Listing program includes an ignition-resistant-material category and at least one steel fencing product. This KAYU® listing applies to the listed material and use described by OSFM; it does not by itself approve every fence or gate assembly.
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]
Working with a contractor
Firewise publishes product and fire-zone research. A homeowner should verify a contractor's current C-13 license, confirm product availability and the measured scope, compare written proposals, and contract and pay the selected contractor directly.
Next steps:
Use Check Your Home to review public fire-zone context and nearby C-13 license records.
Product information on this page reflects our understanding as of August 20, 2026; the OSFM listing expires June 30, 2027; flag for re-verification before then. Specs and warranty terms may change. Verify current product details with KAYU and verify the proposed scope with the independent contractor you select.