Drywall vs Gypsum Fiber Board: Differences and Where to Use Each

When ordering partitions, suspended ceilings, or a dry floor screed from a factory or warehouse in China, it is easy to mix up two similar-looking materials: drywall (gypsum plasterboard, GKL) and gypsum fiber board (GVL). Both look like flat sheets of similar thickness, but they differ fundamentally in composition, strength, and where they belong in a build — get the spec wrong and either an overloaded fastener tears out of the wall, or a floor under heavy flooring sags at the joints over time. Here is the difference and where each one applies, so you can lock the right material into your brief before ordering.

Drywall (GKL): composition and standard sheets

Drywall is a gypsum core 6.5-12.5mm thick, faced with paper on both sides. That paper facing is what gives the sheet its bending strength and protects the gypsum from chipping during transport and installation. The standard sheet format is 1200x2500 or 1200x3000mm, weighing about 8.5-9.5 kg/m2 at 12.5mm thickness. A thin, flexible 6.5mm sheet is used for arches and curved elements — it bends to a radius without pre-wetting.

Types of drywall by facing color: standard, moisture-resistant, fire-rated

The color of the facing paper at a sheet’s cut edge signals its purpose:

• Standard drywall (gray facing). The baseline choice for dry residential spaces — partitions, suspended ceilings, boxed-in service runs.
• Moisture-resistant (green facing). A hydrophobized core with under 10% water absorption, tolerant of brief condensation and elevated humidity — bathrooms, kitchens, balconies. Not a substitute for full waterproofing: wet areas going under tile still need a liquid membrane applied over the board.
• Fire-rated (pink or red facing). Glass fibers added to the core keep the board from cracking apart under heat — used in partitions and enclosures that need an EI30-EI60 fire rating.
• Moisture- and fire-rated combined. Covers technical rooms that need both properties at once.

Gypsum fiber board (GVL): the fundamental difference

Gypsum fiber board is not a gypsum-and-paper sandwich at all — it is a homogeneous pressed mix of gypsum binder and cellulose fibers, with no facing. Its core density runs 1150-1250 kg/m3, versus the looser gypsum in standard drywall, which makes it stronger against breakage, resistant to crumbling at an exposed cut edge, and able to hold a screw almost anywhere on the sheet rather than only where the paper facing reinforces it. Thicknesses run 10, 12.5, and 20mm; the 20mm sheet (the Knauf superboard type) is the standard for dry floor screeds. The trade-off for that density is weight: the same sheet format in gypsum fiber board is 30-50% heavier than drywall.

Strength and fasteners: what a wall or floor can hold

• Drywall on a metal stud frame holds light items (shelves, light fixtures, mirrors) on toggle anchors up to about 5-8 kg per point. Heavy appliances, wall-mounted cabinets, and TVs need a plywood or timber backing block built into the frame during installation — a screw driven into bare gypsum will not hold that load.
• Gypsum fiber board, thanks to its dense homogeneous core, holds fasteners more reliably and suits floors under heavy finish flooring (porcelain tile, engineered wood) without the edge delaminating under point loads.

Where to use each: walls, ceilings, floors

• Partitions and suspended ceilings — almost always standard drywall on a metal frame: it is lighter, cheaper, and strong enough for the job, with the moisture- and fire-rated variants covering bathrooms and technical rooms.
• Curved elements, arches, niches — flexible 6.5mm drywall.
• Dry floor screed — moisture-resistant gypsum fiber board, two 10mm layers over an expanded-clay fill, glued between layers with staggered joints. The system is ready for finish flooring the next day, versus 28+ days for a wet cement screed to gain strength.
• Underfloor heating and bathroom floors — moisture-resistant gypsum fiber board over insulation or a heating system, where both the material’s density and its tolerance for residual moisture matter.

Comparison table: drywall vs gypsum fiber board

Property	Drywall (GKL)	Gypsum fiber board (GVL)
Composition	Gypsum core + paper facing on both sides	Homogeneous mix of gypsum and cellulose fibers
Core density	~700-800 kg/m3	~1150-1250 kg/m3
Weight, 12.5mm sheet	8.5-9.5 kg/m2	12-17 kg/m2
Edge strength	Crumbles at an exposed cut edge	Does not crumble, holds its shape
Fastener load without backing	Up to 5-8 kg per toggle anchor	Higher, due to the dense core
Primary use	Walls, ceilings, boxed runs, arches	Dry floor screed, heated floors, load-bearing partitions
Price tier	Lower	20-40% higher

What to lock into the spec when ordering

• Facing type and color (standard / moisture-resistant / fire-rated / combined) matched to the specific room — residential, humid, or fire-rated.
• Sheet thickness and format matched to stud spacing and the task — 6.5mm for curved elements, 12.5mm for standard walls and ceilings, 20mm gypsum fiber board for floors.
• Moisture rating for floors (moisture-resistant gypsum fiber board, not the standard type) in bathrooms and rooms with underfloor heating.
• Packaging and pallet weight — gypsum fiber board is 30-50% heavier than drywall, which changes the volume and container cost calculation when shipping from China.

Drywall and gypsum fiber board are usually ordered in the same spec as the rest of a project’s finishing materials — for more on outfitting a project and quality control, see our guide on sourcing building materials from China. If you need help matching a factory to a specific volume and project, our China sourcing agent service works on a fixed commission.

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Outfitting a project and not sure whether to spec drywall or gypsum fiber board? Send us your floor plan and room list — we’ll match materials to each zone and estimate production, packaging, and delivery to your site. Dream View’s fixed commission is 10% of the order value.