12.5mm British Gypsum Gyproc WallBoard is a staple product in the world of drylining
The 12.5mm British Gypsum Gyproc WallBoard is a staple product in the world of drylining, and we're proud to stock it here at Insulation Warehouse Direct. Whether you're a professional tradesperson tackling a large-scale renovation or a DIY enthusiast refreshing a home interior, this versatile plasterboard delivers reliable performance, ease of use, and great value.
What is 12.5mm Gyproc WallBoard?
Gyproc WallBoard from British Gypsum is a high-quality standard gypsum plasterboard with a nominal thickness of 12.5mm. It features an aerated gypsum core sandwiched between strong paper liners (typically ivory face and brown reverse), making it lightweight yet durable.
Available in popular sizes on our site, including:
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2400mm x 1200mm (the classic 8' x 4' sheet)
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1800mm x 900mm (handy for smaller projects or easier handling)
It comes with two main edge options:
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Square Edge — Ideal when the board will be plastered or skimmed over, or used in applications where joints need to be covered.
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Tapered Edge — Designed for seamless jointing and taping, perfect for a smooth, paint-ready or direct-decoration finish without heavy skimming.
This board conforms to EN 520 Type A standards and is classified as reaction to fire A2-s1,d0.
Key Features and Benefits
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Versatile drylining solution — Suitable for internal walls and ceilings in residential, commercial, and refurbishment projects. Use it in single layers for basic applications or multiple layers for enhanced performance.
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Easy to handle and install — Lightweight (around 8-9 kg/m² depending on exact density), simple to cut, score, snap, and fix with screws or nails to metal or timber frames.
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Smooth finish ready for decoration — Provides an excellent surface for direct painting, wallpapering, or applying a Thistle plaster skim (we also stock British Gypsum Thistle Multi-Finish for the perfect top coat).
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Basic fire resistance — Offers integrity in standard partition systems (e.g., 30 minutes in many British Gypsum configurations when used with appropriate studs and fixings).
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Acoustic contribution — Helps reduce noise transmission in walls and ceilings, especially when combined with insulation materials like mineral wool or acoustic membranes.
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Sustainable choice — British Gypsum boards are manufactured with a focus on responsible sourcing, and gypsum plasterboard is fully recyclable at end of life.
Note: This is not a specialist board — for high-moisture areas (bathrooms, kitchens), opt for moisture-resistant variants; for superior acoustics, consider Gyproc SoundBloc; or for better thermal performance, look at insulated plasterboard options.
Common Applications
- Partition walls in new builds or extensions
- Ceiling linings (flat or suspended)
- Overboarding existing surfaces for a fresh start
- Internal drylining where standard levels of fire, structural, and acoustic performance are needed
- DIY projects like loft conversions, home offices, or room makeovers
Why Buy from Insulation Warehouse Direct?
We specialise in high-quality insulation and associated drylining products at competitive trade prices. Our British Gypsum range includes not just WallBoard but complementary items like jointing compounds (e.g., Gyproc Easi-Fill), metal beads, and Thistle plasters — everything you need for a complete job.
- Fast UK delivery
- Bulk options for larger projects
- Expert advice if you need help choosing the right board or system
Browse our full British Gypsum collection today and add 12.5mm Gyproc WallBoard (square or tapered edge) to your cart. Stock levels move quickly on best-sellers like the 2400 x 1200mm sheets, so don't delay!
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