What Is Plaster | Requirement of Good Plaster | Types of Plasters

What Is Plaster?

This id the process of covering rough walls, uneven surfaces in the construction house and other structures with a plastic material, called plaster or mortar.

Sometimes, the term ‘rendering’ is used instead of plastering when the plaster or cement is applied to the external surface of the wall either to improve the appearance or to protect then from wether agencies, such as rain heat, etc.

Requirement of Good Plaster

To turn out to be a good plaster, the plastering material must possess to satisfy the following requirement

1. It should adhere to the background and should remain adhered to during all variations of the climate changes. Also, it should be possible to apply it during all weather conditions.
2. It should not contract in volume while drying and setting. Otherwise, it will crack and give an unsightly appearance.
3. It should be cheap and economical.
4. It should be hard and durable, providing a smooth, non-absorbent, and washable surface with required decorative effect and durability.
5. It should offer good insulation against sound and high resistance against fire.
6. It should effectively check the entry or penetration of moisture from the surface.
7. It should possess good workability.

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Types of Plasters

• Browning plaster.
• Bonding plaster.
• Thistle plaster.
• Carlite plaster.
• Hardwall plaster.
• Dri-coat plaster.
• One Coat plaster.
• Tough coat plaster.

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#1. Browning Plaster.

British Gypsum Thistle Browning Plaster undercoat plaster used to provide a smooth, high quality, flat surface to internal walls and ceilings and a durable base for the application of decorative finishes.

#2. Bonding Plaster.

Similar to browning plaster, bonding plaster is also considered as an undercoat on which other things are added.

As mentioned earlier, it is an undercoat plaster, which means it is the first coat to be applied to a newly patched wall.

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#3. Thistle Plaster.

Thistle plaster products are designed to suit either hand or machine application.

Their consistent performance, workability and reliability are assured thanks to our exacting manufacturing standards, which enable plasterers to maximise productivity and cut product wastage on site.

Backed up by a range of compatible, high quality accessories, Thistle plasters produce a high quality surface that’s tough and durable.

Thistle plasters meet all customer demands for an aesthetic, low maintenance internal surface finish for a range of standard and specialist applications.

#4. Carlite Plaster.

Carlite plasters provide a smooth high quality surface to internal walls and ceilings. They also provide a durable base for the application of decorative finishes.

The range includes two-coat plastering (using basecoat & finish coat plaster), finish plastering over plasterboards and special application plasters.

The plasters can be used in both new buildings and refurbishment and can be applied to all common background types.

Specialist applications include:

• X-ray protection
• Projection plastering
• Airtightness
• Salt retarding plastering

Carlite plasters are pre-mixed and only require the addition of clean water. They have a controlled setting time
and are free from inherent shrinkage cracking.

All plasters are predominantly supplied in 25kg bags for ease of handling and storage.

Limitations

• Carlite plasters should not be used to isolate dampness.
• Not suitable for use in continuously damp or humid conditions.

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#5. Hardwall Plaster.

Hardwall Plaster is usually applied over cement render or concrete to provide a smooth finish for painting or decoration.

It is easy to trowel making initial application and finishing easier. When used with hydrated lime (lime putty), a high gloss finish is produced.

Typical Applications of Hardwall Plaster

• Hardwall Plaster is typically used in both residential and commercial construction as a finishing coat over cement render or concrete in preparation for painting.
• When used with hydrated lime (lime putty), a high gloss finish is produced which can be waxed to create a decorative finish.
• In hot or dry conditions it may be necessary to wet the surface before application to prevent the plaster drying out before setting.

#6. Dri Coat Plaster.

• Thistle DriCoat is the only plaster recommended for re-plastering walls following damp-proof course treatment.
• Heavy salt contamination in the background can cause persistent damp problems.
• Conforms to EN 998-1.
• This product is certified to BES 6001 achieving a rating of ‘Excellent’
• Available in 25kg bags.

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#7. One Coat Plaster.

• Plastering provides your walls and ceiling with a smooth, durable coating.
• One coat plaster is a particular kind of plaster created to offer a simpler approach to plastering.
• It allows for application with fewer steps since this plaster acts as base and finishing coat in one.

#8. Tough Coat Plaster.

• Thistle Tough Coat is a gypsum undercoat plaster for use on most masonry.
• With a final coat of Thistle Multi-Finish, it provides a smooth, inert, high quality surface to internal walls.
• It is suitable for application by hand or by plaster projection machine.