Plaster
Plaster Meaning
Plaster is a building material used to coat, protect, and decorate walls and ceilings. It starts as a dry powder, becomes malleable when mixed with water, and hardens into a smooth, solid surface. Plaster is prized for its versatility and ability to be moulded into different textures, creating a variety of finishes on the surfaces it is applied to.
How is Plaster Made
Plaster is made by heating gypsum, a natural mineral, to around 300°F (150°C). This process is known as calcining, which removes water from the gypsum and turns it into a powder called plaster of Paris. When water is added back to this powder, it rehydrates and hardens. Some plaster mixes include lime or cement, increasing durability and workability for different uses.
Potential Issues While Working with Plaster in Construction and How to Avoid Them
1. Cracking: Plaster can crack as it dries. To prevent this, ensure walls are clean and free from dust before application, apply plaster evenly, and control the room's temperature and humidity to reduce the drying rate.
2. Dampness: Plaster can become damp when applied in moist conditions or on wet surfaces. To avoid this issue, make sure surfaces are dry and the room is well-ventilated.
3. Poor Adhesion: Plaster may not stick well to smooth surfaces. To improve adhesion, roughen the surface slightly with sandpaper or apply a bonding agent designed for plaster.
4. Uneven Finishes: Inexperienced applications can result in lumps or uneven textures. Practice plastering techniques on a small, inconspicuous area first, and use the appropriate tools, like a plasterer’s trowel, for smoother finishes.
Working with plaster in construction requires care and preparation. With an in-depth understanding of what plaster is, you can mitigate any potential issues and achieve durable, beautiful results that enhance your home’s interior.
