Drywall, also called plasterboard or gypsum board, is one of the most widely used materials for interior walls and ceilings. It creates a smooth surface ready for paint, wallpaper, or tiling, while supporting fire protection, sound control, and moisture resistance when the correct board type is selected.
If you want to buy drywall online, understanding board types, thicknesses, edge profiles, and installation requirements will help you avoid costly mistakes and achieve a professional finish.
Why drywall is a smart choice
Drywall is fast to install, relatively affordable, and suitable for almost every interior space. It is used in homes, offices, retail units, schools, hospitals, and industrial buildings because it provides a clean, consistent finish with predictable performance.
Modern drywall systems can do much more than create a flat wall. Special boards improve acoustic separation, resist moisture, increase fire performance, and support heavier fixtures when combined with the right framing and fixings.
Types of plasterboard
Standard plasterboard
Standard gypsum board is the everyday choice for walls and ceilings in dry interior areas. It is suitable for bedrooms, living rooms, hallways, and offices where moisture exposure is limited.
It is available in different thicknesses, commonly around 9.5 mm and 12.5 mm. Thicker boards generally offer better sound reduction and impact resistance.
Moisture resistant plasterboard
Moisture-resistant boards are designed for humid spaces such as bathrooms, utility rooms, kitchens, and basements. They use additives that improve resistance to water absorption.
Moisture-resistant plasterboard is not waterproof. In showers and wet zones, it should still be protected with appropriate waterproofing, tiles, or a complete wet-room system.
Fire resistant plasterboard
Fire-resistant boards contain additives that improve performance in fire conditions. They are commonly specified for garages, stairwells, corridors, boiler rooms, and separating walls.
Fire performance depends on the complete system, including studs, fixings, joints, sealants, and finishes. Always follow the manufacturer’s tested system details rather than assuming a single board provides a certified fire rating.
Soundproof plasterboard
Acoustic plasterboard is denser than standard board and helps reduce sound transfer between rooms. It is useful for bedrooms, home cinemas, offices, apartments, and party walls.
For the best acoustic result, combine acoustic boards with mineral wool insulation, resilient bars, staggered studs, and sealed joints. Sound travels through gaps and structural connections, so system design matters as much as board choice.
Impact resistant plasterboard
Impact-resistant boards are reinforced for high-traffic areas such as schools, corridors, sports facilities, and commercial interiors. They resist dents and damage better than standard drywall.
Choosing the right thickness
The most common plasterboard thicknesses are 9.5 mm and 12.5 mm.
Use 9.5 mm boards for ceilings and lighter-duty walls where weight and handling are important. Use 12.5 mm boards for walls, high-traffic areas, improved sound reduction, and applications where greater rigidity is needed.
For curved walls, arches, or detailed ceiling designs, thinner flexible boards may be available. For heavy wall-mounted items, use appropriate fixings, plywood reinforcement, or a stronger backing system.
Drywall edge types
Tapered edges are the most common choice for walls and ceilings. The shallow recess allows jointing compound and tape to create a smooth, invisible seam.
Square-edge boards are often used where the surface will be skimmed with plaster. They can also be suitable for certain textured finishes or decorative systems.
Before ordering, check whether your finishing method requires tapered or square edges. Choosing the wrong edge type can create extra work during finishing.
How to calculate drywall quantities
Measure the wall and ceiling area in square metres, then divide by the coverage of each board. Add an allowance for cuts, waste, and damaged sheets.
A practical rule is to add 10 percent for straightforward rooms and 15 percent for rooms with many openings, angles, or complex ceiling details.
Also calculate:
Metal studs or timber battens
Screws or drywall nails
Joint tape
Jointing compound or plaster
Corner beads
Primer and paint
Buying the complete system together reduces delays and helps ensure material compatibility.
Delivery and storage tips
Drywall sheets are heavy and vulnerable to edge damage. When arranging drywall delivery, ensure there is clear access for a pallet truck or manual handling.
Store boards flat on a dry, level surface. Keep them away from moisture, direct rain, and uneven ground. If boards must be stored vertically, support them fully along their length to prevent bending.
Damaged edges can create weak joints and visible imperfections after painting, so careful handling saves both material and labour.
Installation best practices
Start with a level framing system. Fix boards with the correct screw spacing, keeping screws slightly below the surface without tearing the paper facing.
Stagger vertical joints between rows to improve strength and reduce cracking. Leave a small gap at floor level to prevent moisture transfer from the slab, and seal joints carefully with tape and compound.
For bathrooms and kitchens, use moisture-resistant board and appropriate waterproofing details. For fire-rated walls, follow the tested specification exactly.
Final thoughts
Drywall remains one of the most cost-effective materials for creating modern interior spaces. Standard plasterboard suits everyday walls and ceilings, while moisture-resistant, fire-resistant, acoustic, and impact-resistant boards solve specific performance challenges.
When you buy drywall online, choose the board for the room, not just the lowest price. The right plasterboard system delivers a smoother finish, better durability, improved comfort, and fewer repairs over time.
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