Allura Shake delivers the only 1/4″ thick fiber cement shake panel on the market that offers 16″ width coverage with a legitimate cedar texture and Class A fire rating. At 10 lbs per panel, it’s 20% lighter than competing 5/16″ products while maintaining full structural integrity for Montana’s demanding climate zones.
This 16″ x 48″ panel targets contractors who need fire-resistant siding that actually looks like cedar shakes — not the flat, obviously fake texture most fiber cement tries to pass off. The 30-year limited warranty backs both the substrate and coating when installed per manufacturer specs.
Technical Specifications
| Specification | Value |
|---|---|
| Material | Fiber Cement |
| Thickness | 1/4″ (0.25 in) |
| Panel Dimensions | 16″ x 48″ |
| Exposure | 7″ |
| Weight | Approx. 10 lbs per panel |
| Fire Rating | Class A (Non-combustible) |
| Wind Load | Meets various local and regional requirements (e.g., Florida FL20742, Texas EC-16) |
| Moisture Movement | Complies with ASTM C1185 criteria |
| Coverage | Approx. 43 panels per square (100 sq ft) based on 7″ exposure |
Fire Performance and Code Compliance
CalFire WUI Listing 8170-2180:0501 means this product meets California’s strictest wildfire interface standards — critical for Montana’s increasing WUI development. The Class A (Non-combustible) rating isn’t marketing fluff. ASTM C1186 compliance confirms the fiber cement formulation meets industry standards for flat non-asbestos sheets.
Additional certifications include ICC-ES CER-1012 (2024 IBC/IRC, 2023 FBC/FRC, 2022 CALGreen, 2020 ICC 700). The Miami-Dade County Notice of Acceptance proves this panel handles extreme weather — if it survives hurricane testing, Montana winters won’t phase it.
Installation Efficiency
Panels are installed as continuous 16-inch wide units with 7-inch exposure. That’s faster coverage than individual shakes while maintaining the authentic staggered appearance. Requires corrosion-resistant fasteners and a moisture barrier.
Primed units typically contain 300 panels per pack, while pre-finished Spectrum units contain 129 panels. The math works out to approximately 43 panels per square, making material calculations straightforward.
Siding nails or appropriate fasteners spaced per manufacturer guidelines; 1-1/4 inch thick trim recommended when butting to lap siding. Standard tools handle the job: circular saw or panel saw, drill/driver, level, tape measure, safety gear.
Real-World Performance vs Alternatives
Compared to natural cedar wood, Allura is non-combustible, resistant to rot and termites, and requires significantly less maintenance than natural wood while providing a similar look. Cedar might have the heritage appeal, but it burns, rots, and feeds bugs.
Against vinyl shake, Allura offers a higher fire rating (Class A vs typical Class C/D), better impact and wind resistance, and a more authentic texture that doesn’t expand/contract as much. Vinyl melts. Fiber cement doesn’t.
Compared to engineered wood (e.g., LP SmartSide), Allura’s fiber cement composition contains no organic wood strands, making it superior in fire resistance and moisture stability, though it is heavier. The weight penalty pays dividends in durability.
Professional Assessment
Generally positive; professionals note it as a cost-effective alternative to Hardie board with similar durability. The 1/4″ thickness provides the key advantage — easier handling without sacrificing performance.
Weather-resistant but requires precise installation and flashing to avoid paint peeling over time. Like all fiber cement, the installation details matter. Get the flashing right or deal with callbacks.
Compatible caulks: Bostik DUO-SIL Ultra, OSI QUAD MAX. The product works with Allura Trim (5/4″ and 8/4″), Allura Soffit and Backerboard, Allura Spectrum touch-up paint for complete system integration.
For Montana’s WUI zones, the combination of 1/4″ thickness reducing weight by 20%, Class A fire rating, and CalFire WUI certification makes this a defensible choice. The 10 lb panel weight matters when you’re hauling materials up mountain job sites at elevation.
Frequently Asked Questions
Q: How much does Allura Shake weigh compared to other fiber cement shakes?
Allura Shake 1/4″ panels weigh approximately 10 lbs per panel, making them 20% lighter than competing 5/16″ fiber cement products. This lighter weight matters when hauling materials up scaffolding or mountain job sites.
Q: What’s the actual coverage per square for Allura Shake panels?
You’ll need approximately 43 Allura Shake panels per square (100 sq ft) based on the 7″ exposure. Each 16″ x 48″ panel provides faster coverage than individual shakes while maintaining authentic appearance.
Q: Does Allura Shake meet wildfire zone requirements?
Yes, Allura Shake carries a Class A fire rating (non-combustible) and CalFire WUI Listing 8170-2180:0501, meeting California’s strictest wildfire interface standards. This certification applies to Montana’s WUI zones as well.
Q: How does Allura compare to LP SmartSide for moisture resistance?
Allura’s fiber cement composition contains no organic wood strands, making it superior to engineered wood products like LP SmartSide in fire resistance and moisture stability. The trade-off is Allura’s heavier weight, though the 1/4″ thickness minimizes this penalty.
Q: What warranty does Allura provide on their shake siding?
Allura offers a 30-year limited warranty covering both substrate material defects and performance when installed per manufacturer instructions. Pre-finished Spectrum lines may include a separate 30-year coating warranty.
Q: Can you use regular caulk with Allura fiber cement shakes?
Allura specifies compatible caulks including Bostik DUO-SIL Ultra and OSI QUAD MAX for best performance. Using the wrong caulk can void warranty coverage and lead to premature joint failure.
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