Frequently Asked Questions


I plaster-boarded my room 3 years ago, will I have to prepare the board before plastering?

Yes, after some time the plasterboard becomes very porous and is difficult to plaster.  Plasterboard that has been up for more than 6 months may need to be prepared by treating it with diluted PVA glue.
Can I use standard plasterboard behind my wood burner?

No, it is advised to use the heat resistant board (usually pink in colour) in this case.
Can I use standard plasterboard behind my shower cubicle?

No, it is advised to use the water resistant board (usually green in colour) in this case.
How far apart should I place the screws when fitting plasterboard?

Drywall screws (black metal screws) should be placed every 40 cm or so. On a full size board 2.5 m x 1.2 m, there should be approximately 32 screws.  The board should not move at all under pressure.  If it does, you may need to add more screws.
My plasterboard screws are a little proud of the board, is this okay?

No, the trowel will knock these screw heads when plastering.  The screws should sit just below the surface of the board, not proud of it.
Can I keep the heating on in the room you will plaster?

It is preferable to have no heating in the room at the time of plastering, or when drying.  There is a chance the new plaster could crack if it dries out too quickly.
Can I use a dehumidifier to help dry the plaster?

Yes, this is a good solution, especially in cooler, damp conditions. However, good ventilation is the easiest way for plaster to dry naturally.  Heating should be avoided.
When can I paint the plaster?

As soon as it is completely dry.  The edges / joints will dry slower as the plaster is usually thicker in these areas.  Plaster should be primed with a coat of diluted matt emulsion before painting with the final colour.

Plasterer Rob Berry

Rob Berry Plasterer

Registered and insured in France since 2009.