Plasterboard is made of a sheet of Gypsum bonded in between a facer and a backer. It is designed to be used to create internal walls and ceilings that are ready to decorate with either plaster, paint or, wallpaper. Plasterboard comes in a range of sizes and each board is designed for specific applications.
Plasterboards are also known as wallboards, drywall, and panels or by colour such as pink board (Fire plasterboard), Blue board (Sound plasterboard), and Green board (Moisture plasterboard). Plasterboards will help builders and designers meet building regulations for fire protection, acoustic insulation, and thermal efficiency. It can also help to control condensation and potential damage in areas of high humidity which will prevent mould in the long term.

What is squared edge plasterboard?

Squared edge plasterboards are Gyproc Panels with straight, flat edges, designed to be tightly butted with adjoining boards. Tape and skimming will be required at edges being careful not create a bulge in the surface.
If a square edge board is applied to a wall to achieve a finished smooth wall, the walls can end up with a raised area over each join where the boards have butted together after taping and skimming. However, if you are planning on skimming the walls with plaster anyway then there is no reason to use tapered edge. In fact, if you are plastering you want a flat surface to start from so a straight edge is preferred and at a lower cost. Square edge boards are also a great choice for ceilings.
See some our square edge plasterboards below:

Advantages Of Square Edge Plasterboard

  • Top product for constructing ceilings
  • Easy to install
  • Ready for direct decoration such as plaster, wallpaper, and paint

Disadvantages Of Square Edge Plasterboard

  • Requires skimming
  • Joints may be visible

What is tapered edge plasterboard?

Tapered edge plasterboards are Gyproc Panels with an edge that gently slops off at the edges. This board is specifically designed for wall applications. When joint with other boards it creates a dip that requires filling with compound. Once filled it created a smooth finish.
There is one main reason that tapered edge plasterboard exists, and that is dry lining. Dry lining is when no plaster has been applied to the walls and the plasterboard is used to apply, paint and complete the walls instead. The tapered edge gives a much cleaner finish.
With the gap between the two sheets being tapered it slopes down and is levelled below the rest of the board. This allows room to tape the joint and add some jointing compound on top which will bring the join up to the same level as the rest of the wallboards, allowing for a seamless finish.
See some our tapered edge plasterboards below:

Advantages Of Tapered Edge Plasterboard

  • Top product for constructing walls
  • Provides a cleaner finish
  • Ready for direct decoration such as plaster, wallpaper, and paint

Disadvantages Of Tapered Edge Plasterboard

  • Not suitable for wall corners
  • Not suitable for ceilings
  • Filler required between boards

 

Below are some data on different types of plasterboard brands.

BRITISH GYPSUM
ProductEdgeLengthWidthThicknessColour
Gyproc Wallboard PlasterboardSquared Edge Tapered Edge3000mm, 2700mm 2800mm, 2400mm 1800mm1200mm 900mm12.5mm 15mm 

Ivory

Gyproc Fireline PlasterboardSquared Edge Tapered Edge3000mm, 2700mm 2400mm, 1800mm900mm 1200mm12.5mm 15mm 

Pink

Gyproc Moisture Resistant PlasterboardSquared Edge Tapered Edge3000mm, 2700mm 2400mm1200mm12.5mm 15mm 

Green

Gyproc Sound Bloc PlasterboardSquared Edge Tapered Edge3000mm, 2800mm 2700mm, 2400mm1200mm12.5mm 15mm 

Blue

SINIAT
ProductEdgeLengthWidthThicknessColour
GTEC Standard BoardSquared Edge Tapered Edge3000mm, 2700mm 2800mm, 2500mm 2400mm, 1800mm1200mm, 900mm9.5mm 12.5mm 15mm 

Ivory

GTEC Fire V BoardTapered Edge2400mm1200mm12.5mm 15mm 

Pink

GTEC Moisture BoardTapered Edge3000mm, 2700mm 2400mm1200mm12.5mm 15mm 

Green

GTEC DB BoardTapered Edge3000mm, 2700mm 2400mm1200mm12.5mm 15mm 

Blue

KNAUF
ProductEdgeLengthWidthThicknessColour
Wallboard PlasterboardSquared Edge Tapered Edge3000mm, 2700mm 2400mm, 1800mm1200mm, 900mm9.5mm 12.5mm 15mm 

Ivory

Knauf Fire PanelSquared Edge Tapered Edge3000mm, 2700mm, 2400mm, 1800mm1200mm, 900mm12.5mm 15mm 

Pink

GTEC Moisture PanelSquared Edge Tapered Edge3000mm, 2700mm, 2400mm, 1800mm1200mm, 900mm12.5mm 15mm 

Green

Soundshield Plus PanelSquared Edge Tapered Edge3000mm, 2700mm, 2400mm, 1800mm1200mm, 900mm12.5mm 15mm 

Blue

The difference between tapered edged and square edged boards?

Most boards come with the option of tapered edge (TE plasterboard) or square edge (SE plasterboard). Tapered edge is a more versatile and popular option and easier to install. Tapered edge boards are designed for a tape and joint finish for a seamless result, whilst square edge boards are best suited for a skimmed finish in areas such as ceilings. Some specialist boards are available with squared edge only or tapered edge only.

What are SE and TE plasterboards?

‘SE’ Plasterboard is a shortened term for a ‘Squared Edge’ plasterboard and ‘TE’ Plasterboard is a shortened term for a ‘Tapered Edge’ plasterboard.

How do I know whether to use square edge or tapered edge?

The ultimate question is are you going to skim plaster the walls or ceilings? If the answer is no than a tapered edge will achieve the smoothest finish. If the answer is yes, then it doesn’t matter which board you choose as plaster will be skimmed over the top to create a smooth finish!

Can you just paint plasterboard without skimming?

Yes, you can paint directly onto plasterboard without skimming it. A sealer compound is always recommended on the board first as plasterboard is very absorbent. Diluted PVA is always a good and cheap alternative option. Once sealed and dry it can be painted directly.

How do you cut square edge and tapered edge plasterboard?

Square edge and tapered edge plasterboard can be cut by running and sharp knife down one side of the board, snapping over a hard surface and scoring the other side. A fine-toothed saw is also an option.

How To Install Plasterboard

Using the adhesive applicator, apply adhesive ‘dabs’ to the wall studs approximately 25mm wide and 15mm thick. Place adhesive daubs approximately 200mm apart and 200mm from sheet edges. A map or the plasterboard can be marked to ensure you applying adhesive in the correct places.
Put a couple of small offcuts of plasterboard on the floor against the wall, to allow a 10-millimetre gap at the bottom of the sheet.
Ensuring that the recessed edge side of the wall board sheet is facing OUT, position it horizontally across the studs and push firmly into position. Then place screws at each stud along the top edge.
Next place screws every 300mm along the ends of the sheet and around openings. Remove the offcuts before fastening the bottom edge of the sheet.
Make sure you countersink the screws just below the wall’s surface so they can be filled later, taking care not to break the paper face. A counter-sinking drill bit attachment will prevent over screwing.
Hold the sheets against the adhesive for at least 24 hours – or 48 hours in cool conditions. Do this by fixing temporary blocks (small offcuts) through the board to every second wall stud.
Repeat the process for the next sheet, ensuring they are butted neatly together.

Need more information?
For more information about plasterboards, see our blog which highlights What is Plasterboard.

Here you will find more detail about what each board is and how they differ. This blog will help you find the best board for your project.

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