High Performance Subfloor

Available variants

7 SKUs · all share width 1219mm where applicable

Density 1–1.2 kg/dm³ · Flexural strength ≥ 7 N/mm²

Compliance & certifications

Test reports and assembly references available on request for AHJ submittal.

• UL R15140 — UL Classified for fire-rated floor/ceiling assemblies (H502, H504, H511, U449, U487)
• ASTM C1186-08 — Type A, Grade I
• ISO 8336:2018 — Category A, Class 1, Level 1
• ASTM E-84 — Flame spread 0, smoke developed 0 (Class A)
• ASTM E-136 — Non-combustible
• IBC 2021 — Type I/II construction (§602, §711, §803, Table 601)
• CBC — California Building Code Chapter 7A, §420

Frequently asked questions

Common technical and specification questions for High Performance Subfloor.

• What fire-rated assemblies is High Performance Subfloor classified for?+

  UL R15140 Classified for use in 1-hour and 2-hour fire-rated floor/ceiling assemblies including H502, H504, H511, U449, and U487 designs. Suitable for Type I and Type II construction per IBC 2021 §602, §711, §803, and Table 601. Ask us for the full UL Assembly directory references and approved deck/joist combinations for your specific occupancy.

• Which thickness should I specify for multifamily wood-frame over podium?+

  The 20mm (13/16") panel is the most-specified thickness for multifamily Type V over podium construction. 22mm (7/8") and 25mm (1") are used where additional acoustic mass or longer joist spans are required. 30mm (1-3/16") is reserved for heavy-load commercial floors. We will recommend a thickness once we know your span, joist size, and live-load design.

• When should I use the tongue-and-groove edge profile versus straight?+

  Tongue-and-groove (T&G) panels self-align during installation and reduce panel-edge deflection at joints — preferred for finished floors with thin coverings (LVT, glue-down vinyl, sheet goods). Straight-edge panels are typical when a structural floor topping or self-leveling underlayment will be poured over the subfloor. Both edge profiles share the same UL classifications.

• Does this product meet California Building Code Chapter 7A wildfire requirements?+

  Yes. High Performance Subfloor is non-combustible per ASTM E-136 and meets ASTM E-84 Class A (flame spread 0, smoke developed 0). It is recognized under California Building Code Chapter 7A and §420 for use in Wildland-Urban Interface (WUI) construction. We can provide test reports for AHJ submittal.

• How is it fastened to wood versus steel joists?+

  On wood joists, the panel is screwed with corrosion-resistant fasteners sized to the panel thickness — typical schedule is 6" on panel edges and 12" in the field. On steel joists, self-drilling/self-tapping screws of equivalent corrosion class are used. Full fastening schedule (screw size, embedment, edge distance) is in the technical datasheet — request a copy via the CTA below.