Choosing Plasterboard for Walls, Ceilings, and Dry Lining Projects
Choosing the right plasterboard is not just about picking up a few sheets and getting started. Before any wall or ceiling project begins, you need to settle four key decisions: the board type, thickness, sheet size and edge profile. Getting those right from the start helps avoid delays, unnecessary reordering and finishing problems later on.
Get one of those decisions wrong, such as choosing the wrong edge profile for your finishing method, and it often does not become obvious until the wall is painted, and every joint is on show. Here’s how to work through each choice, whether you are building a new partition, dry lining a room or replacing old plasterboard.
Choose the Right Board Type for the Room
Standard plasterboard is the go-to choice for most dry rooms, including living rooms, bedrooms and hallways. If the space doesn’t have higher moisture levels or specific fire or acoustic requirements, standard boards are usually all you need. It’s the specification most tradespeople use for everyday dry lining and partition walls.
Bathrooms, kitchens and rooms where fire protection or sound insulation matters need something more specialised. Moisture-resistant, fire-resistant and sound-resistant boards are all built around the same gypsum core, but each is designed to deal with a different challenge. Once you have confirmed the board type and edge profile for your project, you can order plasterboard now from Online Insulation, which stocks plasterboard for dry lining and standard wall projects across all of these variants.
Confirm the Right Thickness
Once you have chosen the board type, the next decision is thickness. It affects how solid the finished wall feels, along with its resistance to knocks, fire performance and sound insulation.
- 9.5mm – Best suited to ceilings and lightweight partitions where keeping weight down is the priority.
- 12.5mm – The standard choice for walls and dry lining projects in most homes.
- 15mm – Used where higher levels of fire protection or sound insulation are required, such as separating walls or communal areas.
Keep in mind that thicker boards are much heavier to handle. A 15mm sheet is usually a two-person job, particularly when lifting it into position. It’s also worth sticking to the same thickness throughout a room, because mixing board depths often creates slight steps between sheets that become much more noticeable once the joints have been finished and decorated.
Choose a Sheet Size That Suits the Space
The size of your plasterboard sheets affects both installation time and the amount of finishing work afterwards. A standard sheet measures 1200mm x 2400mm, covering more wall or ceiling with fewer joints to tape and fill.
But bigger is not always better. If you are working in a small property, narrow hallway or loft conversion, a 900mm-wide sheet is often much easier to carry through doorways and around tight corners. The trade-off is more joints to tape, fill and sand before decorating.
It’s worth measuring doorways, staircases and tight corners before placing your order. There’s nothing more frustrating than discovering a full-size sheet won’t actually reach the room where it’s needed, especially when you’re working to a tight schedule.
Handle Boards Safely and Efficiently on Site
Large plasterboard sheets can be awkward to move, and damaged corners or edges can quickly slow a job down. A few simple precautions make installation much easier:
- Lift full-size 1200mm sheets with two people, especially 15mm boards, to reduce the risk of cracking or dropping them.
- In confined spaces such as small bathrooms or cupboards under the stairs, consider using 900mm-wide or 9.5mm boards where appropriate.
- Store sheets flat and raised off the floor until they’re needed to help prevent bowing and moisture damage.
- Measure doorways, stairwells and landings before delivery to make sure the boards can be moved through the property.
- Plan a clear route from the delivery point to the room so boards don’t end up leaning against door frames or radiators overnight.
Pick the Right Edge Profile
Edge profile matters just as much as board type. Tapered edge boards have a shallow recess along the long edges, allowing joint tape and filler to sit flush with the surface. They are the standard choice for dry-lining projects that will be painted or wallpapered after the joints have been filled.
Square edge boards have straight edges and are designed for projects that will receive a full plaster skim. They are also commonly used where the finished surface will be panelled or clad.
Try not to mix edge profiles across the same wall or ceiling. Different edges create uneven joints that are difficult to disguise later. Laying all the boards out before fixing them is a simple way to spot the odd sheet with a different edge profile before it becomes a finishing problem.
Decide Between Dry Lining and Traditional Plastering
Your finishing method should influence the plasterboard you choose. For instance, dry lining fixes plasterboard directly to timber or metal studwork, or to masonry using a dot-and-dab adhesive. The joints are taped and filled before decorating, making it one of the quickest and most cost-effective ways to finish internal walls. It works particularly well with 12.5mm tapered edge boards.
Traditional plastering uses the plasterboard as a base for a full wet plaster skim. The result is a denser, highly uniform finish that’s well suited to walls expected to carry shelves, cupboards or heavier fixings. This approach is typically paired with 12.5mm square edge boards and needs more drying time before decorating can begin.
If speed and budget are the priorities, dry lining usually makes the most sense. If achieving the flattest possible finish matters more, or the walls will need to support heavier fixtures, a traditional skim is often the better option.
Confirm Your Specification Before You Order
Every plasterboard project comes back to the same four decisions, board type, thickness, sheet size and edge profile. Taking a few extra minutes to confirm each one before placing an order helps avoid unnecessary delays, mismatched boards and finishing problems later on.
Choose the right board for the room, match the thickness to the level of performance you need, select a sheet size that’s practical for the property’s access, and make sure the edge profile suits your chosen finishing method. Working through those decisions in that order helps keep the specification consistent from the first sheet to the last, making installation smoother and reducing the chances of problems once the decorating begins.
