SerFibro Flex — Flexible Fibre Cement Board for Curved Facades

SerFibro Flex is a specialist autoclaved, asbestos-free fibre cement board (TS EN 12467 NT) developed specifically for curved interior and exterior facade designs whose radii are far tighter than conventional mineral cladding sheets can tolerate. By pairing refined cellulose-fibre orientation with an elastic mineral binder matrix at 1250 kg/m³ apparent density, SerFibro Flex transforms rigid Class A1 rainscreen and drywall construction into fluid, seamless cylindrical, vaulted and organic geometry.

Standard fibre cement boards fracture if forced around tight structural columns, forcing contractors into costly GRC moulds, rolled aluminium shells or dust-heavy kerf-slotted gypsum boards that cannot survive exterior weather. With extraordinary flexural elasticity, 6 mm SerFibro Flex boards wrap circular columns down to 60 cm diameter (30 cm bending radius) dry on site—without soaking, steaming or rear kerf-cutting—while 8, 10 and 12 mm thicknesses serve progressively broader architectural curves.

SerFibro Flex is manufactured in two full architectural sheet sizes—1250 × 2500 mm (3.125 m²) and 1250 × 3000 mm (3.750 m²)—across four thicknesses: 6 mm, 8 mm, 10 mm and 12 mm. Note that a single 1250 × 2500 mm or 1250 × 3000 mm sheet wrapped with its 2500/3000 mm side along the circumference covers an entire Ø 60–95 cm column perimeter in one or two clean vertical seams.

At an apparent density of 1250 kg/m³, SerFibro Flex weighs approximately 7.5 kg/m² in 6 mm, 10.0 kg/m² in 8 mm, 12.5 kg/m² in 10 mm and 15.0 kg/m² in 12 mm. Compared to dense cementitious cladding or precast curved shells, this lighter mass reduces cantilever soffit and steel sub-framing dead loads, speeds up overhead handling on scaffolding, and lowers road-trailer and sea-container transport cost per square metre.

Produced with a uniform smooth face (TX-SM-01), SerFibro Flex is available Unprimed in natural autoclaved grey or Factory Pre-Primed for accelerated finishing. On curved interior walls it accepts flexible joint compounds, skim coats and interior architectural paints; on curved exterior ventilated facades it pairs seamlessly with alkali-resistant pure acrylic or elastomeric facade coatings in any RAL/NCS colour.

Architects specify SerFibro Flex across circular reinforced-concrete or steel column casings (Ø ≥ 60 cm), curved shopping-mall and airport atrium balustrades, arched window reveals and arcade soffits, barrel-vaulted ceilings, liturgical or cultural domes, rounded building corners, wavy acoustic auditorium shells, and organic hotel reception feature walls.

Form the curved sub-frame using rolled aluminium/galvanized steel ring channels or closely spaced vertical stud profiles following the design arc. Always check natural sheet flexibility orientation before bending to achieve the tightest radius effortlessly. Fix progressively from the centre line outward (or from one anchored edge circumferentially around columns) using corrosion-resistant countersunk screws or rivets, maintaining proper edge clearances and expansion joints.

Escape corridors, airport concourses, mall atriums and high-rise facades demand strict fire performance on curved columns and walls. SerFibro Flex holds EN 13501-1 Class A1 non-combustibility—zero flame spread, zero flaming droplets and zero toxic smoke—combined with superior elastic shock absorption against pedestrian, luggage-trolley and maintenance impacts, plus full exterior resistance to water, frost, UV and biological decay.

Cut SerFibro Flex dry before bending using carbide- or diamond-tipped circular saws or CNC routers with dust extraction. Wipe dry cutting dust off immediately, lightly sand cut arrises, and seal exposed exterior edges with alkali-resistant acrylic primer prior to applying facade topcoats.

Calculate cylindrical column cladding area using true outer arc length (π × outer finished diameter × column height). A Ø 60 cm column has an outer circumference of ~1.89 m, allowing a single 1250 × 2500 mm sheet (3.125 m²) to wrap a 1.25 m height band in one continuous piece. Include 8%–12% cutting allowance for conical, elliptical or vaulted geometries.

Pallets hold 100 / 75 / 60 / 50 sheets in 1250 × 2500 mm (up to 312.50 m² per pallet in 6 mm) and 80 / 60 / 50 / 45 sheets in 1250 × 3000 mm (up to 300.00 m² per pallet in 6 mm). Because apparent density is 1250 kg/m³, gross pallet weights are roughly 7%–10% lighter than standard dense boards, improving container payload utilisation.

Store SerFibro Flex pallets flat on level, dry indoor floors protected from rain and direct sun so sheets remain planar until bent on the sub-frame. Lift boards vertically off the stack without dragging, and carry thin 6–8 mm flexible sheets vertically on edge with two operatives so they do not sag excessively during manual transport.

Most projects require SerFibro Flex specifically for curved columns, corner sweeps, arches and atrium ribbons alongside flat facade elevations. We consolidate SerFibro Flex pallets in the same export trailer or 20 ft sea container with SerFibro LightBoard, Smooth Exterior, Calibrated or ColorBoard sheets under EXW, FCA, FOB, CIF or DAP terms.

Standard material quotations cover SerFibro Flex boards in the confirmed thickness (6–12 mm), format and surface finish (Unprimed or Pre-Primed) with export palletising. Upon request, CFY Engineering & Architecture also provides radius feasibility verification, curved substructure detailing, modulation consultancy and site installation as dedicated quotation items—contact us via +90 505 507 04 18 or [email protected].