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B1 Fire Retardant 148mm 21mm WPC Cladding Weatherproof Exterior Composite Wall Cladding

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B1 Fire Retardant 148mm 21mm WPC Cladding Weatherproof Exterior Composite Wall Cladding

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Supply Ability : 1000000pcs/week

Waterproof : 100%

Material : Wood Plastic Composite

Model Number : FS-148-23

Applications : inside&outside

Flexural Modulus : ≥3000 MPa

MOQ : 20packages

Delivery Time : 5-8workdays

Uvresistance : UV stabilized for outdoor use

Style : Traditional, Industrial, CLassic

Flexural Strength : ≥25 MPa

Payment Terms : Western Union,T/T,D/A,D/P,L/C

Usage : Terrace, ceiling

Fireresistance : Class B1 fire rating (flame retardant)

Material Composition : 60% Wood Fiber, 30% HDPE, 10% Chemical Additives

Price : $1-1.8

Elastic Modulus : 4600MPa

Product Profile : 148mm * 21mm

Fire Retardant Rating : B1 - s1, d0 (Class B1 Difficult to Flit)

Termite & Mold Resistance : Grade 0

Brand Name : Vanshine

Coloroptions : Multiple colors available

Boiling Test : No cracking, no delamination, swelling rate ≤1.0%

Certification : CE，SGS

Water Absorption : 0%

Place of Origin : China

Logo : Customized Logo Acceptable

UV Resistance : UV stabilized for outdoor use

Packaging Details : pallet/carton

Waterresistance : High water resistance

Water Resistance : High water resistance

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B1 Fire Retardant 148mm 21mm WPC Cladding Weatherproof Exterior Composite Wall Cladding
Product Summary
This premium 148mm 21mm WPC cladding is engineered for demanding architectural projects. Featuring a certified B1 fire retardant rating for maximum safety, this high-performance exterior composite wall cladding delivers exceptional weatherproof durability against severe climates and UV exposure, providing an elite, low-maintenance facade solution for commercial and residential developments.
About this Product
  • Certified B1 Fire Retardancy: Tested to meet strict commercial building codes, this cladding achieves a certified B1 fire-retardant rating. It effectively retards flame spread, fully satisfying the rigorous fire safety regulations required for commercial developments, high-density residential projects, and public infrastructure.
  • Precision 148mm * 21mm Profile: Manufactured in strict accordance with international manufacturing tolerances, the 148mm width and 21mm thickness deliver exceptional impact strength and structural stability, ensuring a seamless interlocking fit during installation.
  • All-Weather Weatherproof Protection: Formulated with high-performance UV stabilizers and high-density polymers, the material features an extremely low water absorption rate. It resists swelling, warping, and cracking under extreme weather conditions, including severe temperature fluctuations, intense UV exposure, and heavy rainfall.
  • High-Performance WPC Composition: By scientifically blending natural wood fibers with heavy-duty polymers, this first-generation WPC exterior panel fundamentally eliminates the common vulnerabilities of traditional timber, such as rotting, termite infestation, and splintering.
  • Project-Grade Exterior Solution: Engineered specifically for high-standard architectural facades, this composite cladding maintains long-term color stability while drastically reducing post-installation maintenance costs, helping contractors win project bids and eliminate client callbacks.
B1 Fire Retardant 148mm 21mm WPC Cladding Weatherproof Exterior Composite Wall Cladding
Technical Specification
Technical Property Test Standard Specification Value
Product Profile Physical Measurement 148mm * 21mm
Product Type Manufacturing Process 1st Generation Solid/Hollow WPC Cladding
Fire Retardant Rating EN 13501-1 / GB 8624 B1 - s1, d0 (Class B1 Difficult to Flit)
Material Composition Factory Formula6 60% Wood Fiber, 30% HDPE, 10% Chemical Additives
Water Absorption EN 15534-1 / ASTM D1037 ≤ 1.5% (After 28 days immersion)
Flexural Strength EN 15534-4 / ASTM D7032 ≥25 MPa
Flexural Modulus EN 15534-4 ≥3000 MPa
Boiling Test EN 15534-1 No cracking, no delamination, swelling rate ≤1.0%
Termite & Mold Resistance (防虫防霉) ASTM G21 / En 318 Grade 0
Certification
B1 Fire Retardant 148mm 21mm WPC Cladding Weatherproof Exterior Composite Wall Cladding
Application Gallery
B1 Fire Retardant 148mm 21mm WPC Cladding Weatherproof Exterior Composite Wall Cladding B1 Fire Retardant 148mm 21mm WPC Cladding Weatherproof Exterior Composite Wall Cladding B1 Fire Retardant 148mm 21mm WPC Cladding Weatherproof Exterior Composite Wall Cladding B1 Fire Retardant 148mm 21mm WPC Cladding Weatherproof Exterior Composite Wall Cladding
How to Install
  • Step 1 (Substructure Framework): Secure the aluminum, galvanized steel, or WPC joists vertically onto the wall using expansion screws. Use a laser level to strictly align and ensure all joist surfaces are on the exact same vertical plane.
  • Step 2 (Installing Starter Clips): Measure horizontally and lock the stainless steel starter clips at the absolute bottom of each vertical joist to establish a perfect level baseline for the first row of cladding.
  • Step 3 (Fixing the First Panel): Slot the bottom groove of the first 148mm*21mm WPC cladding board fully into the starter clips. Adjust its position, making sure the tongue side of the profile faces upward.
  • Step 4 (Securing with Hidden Fasteners): Insert hidden stainless steel screw fasteners into the edge of the upper groove of the board and lock them securely into the joist framework. If using WPC joists, pre-drilling is mandatory to prevent the joist from splitting due to uneven stress.
  • Step 5 (Sequential Interlocking Installation): Align and slide the bottom groove of the next cladding board onto the exposed tongue of the secured board below. Repeat this interlocking and fastening process, using a spirit level to check alignment every 3 rows to avoid cumulative tolerance errors.
  • Step 6 (Corner and Edge Finishing): Cover all external corners, window perimeters, and top edges with matching WPC L-corners or fascia trims. Secure them using exterior-grade structural adhesive or color-matched screws to achieve a seamless, modern architectural look.
Colors
B1 Fire Retardant 148mm 21mm WPC Cladding Weatherproof Exterior Composite Wall Cladding
Our Factory
B1 Fire Retardant 148mm 21mm WPC Cladding Weatherproof Exterior Composite Wall Cladding B1 Fire Retardant 148mm 21mm WPC Cladding Weatherproof Exterior Composite Wall Cladding B1 Fire Retardant 148mm 21mm WPC Cladding Weatherproof Exterior Composite Wall Cladding
FAQ
Q1: Does this 148mm 21mm WPC cladding have an official fire rating?
Yes. This premium exterior composite wall cladding is certified to meet the B1 fire-retardant standard (specifically EN 13501-1 Class B-s1, d0). It is a difficult-to-ignite material that significantly retards flame spread, emits extremely low smoke, and produces no flaming droplets, making it fully compliant with commercial and residential building safety codes.
Q2: What makes this WPC cladding "weatherproof" for long-term exterior use?
Our first-generation WPC formula incorporates high-density HDPE polymers and advanced anti-UV stabilizers. With an exceptionally low water absorption rate (≤ 1.5%), the 148mm*21mm profile resists warping, rotting, splintering, and mold growth, ensuring structural integrity under severe temperature fluctuations, intense UV exposure, and heavy rainfall.
Q3: What are the exact dimensions of this profile, and what is its effective coverage?
The nominal profile dimension is 148mm in width and 21mm in thickness. Due to its interlocking tongue-and-groove design, the effective visible coverage width per board is approximately 138mm (actual net coverage may vary slightly based on installation tolerance). Our factory maintains strict manufacturing tolerances to ensure a seamless fit.
Q4: Does the color of this weatherproof exterior cladding fade over time?
As a high-performance exterior composite cladding, it contains premium UV inhibitors. Like all WPC materials, it will undergo a slight, natural weathering transition during the first 3 to 6 months of outdoor exposure before stabilizing. After this initial seasoning period, the color remains highly stable (Δ E ≤ 2.0) and will not require painting or staining.

Product Tags:

fire retardant WPC cladding

      

weatherproof exterior composite cladding

      

148mm WPC wall cladding

      
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