Structo-Crete Alternatives
Alternatives to USG Structo-Crete for Non-Combustible Subfloor Applications
If you're searching for alternatives to Structo-Crete panels for fire-rated floor assemblies, you're not alone. Many architects, engineers, and general contractors are seeking cost-effective, readily available options for non-combustible subfloor systems in Type I and Type II construction.
Are There Alternatives to Structo-Crete?
Yes. Plycem High Performance Subfloor panels are a direct alternative to USG Structo-Crete for non-combustible subfloor applications. Both products are:
- UL Classified for fire-rated floor/ceiling assemblies
- Non-combustible per ASTM E136
- Designed for wood and steel joist framing
- Installed with mechanical fasteners (screws)
- Suitable for Type I and Type II construction
Addressing the "Only" Claim
USG markets Structo-Crete as "the only UL-certified noncombustible cementitious panel in North America." This claim refers specifically to panels manufactured in the United States.
Plycem panels are manufactured in Central America (Costa Rica/El Salvador) by The Plycem Company (Elementia Group), but they are UL Classified under File Number R15140, meet ASTM C1186-08 Type A Grade I, and are classified non-combustible per ASTM E136 — the same standard Structo-Crete is tested against. Both products serve the same function in Type I and Type II construction.
Head-to-Head Comparison: Plycem vs. Structo-Crete vs. Poured Gypsum
Objective comparison of non-combustible subfloor options available in the US market.
| Characteristic | Plycem | USG Structo-Crete | Poured Gypsum Concrete |
|---|---|---|---|
| Material Type | Fiber-reinforced Portland cement | Fiberglass-reinforced cementitious panel | Gypsum-based cementitious slurry |
| Manufacturing Origin | Central America (Elementia) | United States (USG) | USA/Canada (Maxxon, Hacker, etc.) |
| UL Classification | R15140 | R2694 | Varies by system |
| Non-Combustible (ASTM E136) | Yes | Yes | Yes (inherently) |
| Fire Ratings Available | 1-hour, 2-hour | 1-hour, 1.5-hour, 2-hour | Up to 3-hour |
| ASTM E-84 Flame Spread | 0 (Class A) | 0 (Class A) | 0 |
| ASTM E-84 Smoke Development | 0 | 0 | 0 |
| Thickness Options | 20mm, 22mm, 25mm, 30mm | 3/4" (19mm) only | Varies (1"-2" typical) |
| Cost per 4'x8' Panel | $79-88 (CIF Long Beach) | $255-270 (retail) | $90-120 (material + labor equiv.) |
| Cost per Square Foot | $2.45-2.75 | $8.00-8.40 | $2.80-3.75 |
| Lead Time (West Coast) | 0-3 days (in stock) | 2-6 weeks | 7-14 days + cure |
| Installation Method | Screws | Screws/Staples | Pumped, leveled, cured |
| Installation Speed | 800-1000 SF/day | 700-900 SF/day | Pour + 48-72hr cure |
| Moisture Resistance | Excellent (ASTM C1186 Type A) | Good (ASTM C1185 Type B) | Moderate |
| ICC-ES Report | None (UL R15140 available) | ESR-1792 | Varies by manufacturer |
*Structo-Crete® is a registered trademark of USG Corporation. Comparison based on publicly available technical data and current market pricing (February 2026). Pricing subject to change.
Decision Matrix: When to Choose Each Option
Choose Plycem When:
- Budget is a primary concern (save 65-70%)
- Fast delivery is needed (0-3 days available)
- Multiple thickness options are required
- Project is on West Coast or accepts imported materials
- UL R15140 classification is sufficient for project specs
- Immediate availability is critical for schedule
Choose Structo-Crete When:
- Domestic-only specification is required
- ICC-ES report (ESR-1792) is mandated by building official
- Project is on East Coast with established USG supply chain
- 1.5-hour fire rating specifically required
- Spec has already been written for Structo-Crete
Choose Poured Gypsum When:
- Maximum STC/IIC ratings are critical
- 3-hour fire rating is required
- Irregular floor areas or complex geometry
- Existing conditions require self-leveling
- Project has adequate cure time in schedule
Key Advantages of Plycem Over Structo-Crete
65-70% Cost Savings
$79-88/panel vs $255-270/panel. Save $56,000+ per 10,000 SF floor.
Immediate Availability
1,500+ panels in stock Long Beach. 0-3 day delivery vs 2-6 week lead times.
Multiple Thicknesses
20mm, 22mm, 25mm, 30mm options. Right-size for your structural requirements.
Equivalent Certifications
UL R15140, ASTM C1186 Type A Grade I, ASTM E136 non-combustible.
Nationwide Availability & Transit Times
Plycem panels ship from Long Beach, California to all US states. Transit times from warehouse:
| Region | States | Transit Time |
|---|---|---|
| West Coast | CA, OR, WA, NV, AZ | 0-3 days |
| Mountain/Southwest | CO, UT, NM, TX, AZ | 3-5 days |
| Midwest | IL, OH, MI, IN, WI, MN, MO | 5-7 days |
| Southeast | FL, GA, NC, SC, VA, TN | 6-8 days |
| Northeast | NY, MA, PA, NJ, CT | 7-10 days |
For large orders (1,000+ panels), container loads can ship direct from factory to any US port. Contact us for project-specific logistics planning.
Ready to Switch from Structo-Crete?
Request a submittal package and see the Plycem difference for yourself.
Contact Robertson Carrillo: (415) 532-3376 | robert@plycemca.com