Gypsum Plaster

Hand troweled gypsum plaster is ideal for large round “Old World Santa Fe Style” corners and will also work well for a contemporary flat wall with square corners. Gypsum plaster can be built up in single and multiple coats to achieve more depth than any other plaster system available.

Traditional plaster is applied over expanded metal lath and done in 3 coats to an overall thickness of 7/8″. The first coat is called the scratch coat, the second is the brown coat and the final coat is called the finish coat. There are only a few manufacturers of gypsum plaster in the U.S. The product consists of a powder that is similar to cement or lime and is packaged in paper sacks. The base coat material will usually contain a lightweight aggregate called perlite which is mixed with plaster sand and water. The finish coat is traditionally a finer gradation of gypsum, blended only with water. When applying traditional gypsum plaster it is important to control the environment by sealing up the room that the material is being applied in. Gypsum is very susceptible to shrinking, cracking and weakening if the temperature and humidity are not controlled. Direct sunlight and wind can cause gypsum to dry to rapidly. This will cause improper hydration which in turn creates a weak product and different suction rates, affecting the final color. It is important to keep the gypsum damp throughout the process up until the the finish coat. The finish coat is usually white and painted, however, it can be tinted using approved pigment to create integral color.

Looking for a professional and experienced team of plasterers in Melbourne? Look no further than My Plasterers Melbourne! We are experts in plastering and provide a high-quality service that is sure to meet your needs. Contact us today for a free quote!

Some gypsum plaster systems can be applied directly to drywall with the use of bonding agents. This type of plaster, known as “veneer plaster”, is typically applied in one thin coat. Gypsum veneer plaster is fast and usually less expensive than traditional gypsum plaster. When applying a veneer plaster, all joints in the drywall must be prepared with joint compound or with the manufacturer’s recommended joint treatment materials. Once the joints are treated, a bonding agent is required. This is a water based PVA (polyvinyl acetate) or an acrylic bonding agent. PVA bonding agents are for interior use only because they re-emulsify when they get wet. PVA bonding agents are the most popular because they can be dry before the plaster coat is applied (as opposed to an acrylic bonding agent, which must still be wet when the plaster is applied, forcing the applicator to rush the process). A controlled environment is also important when applying a gypsum veneer finish, although some veneers are modified with acrylics, cement and chemicals, providing a better bond, higher compressive and tensile strengths, crack resistance, color retention and crack resistance. These modifications may make the product easier to work with and will give the applicator more flexibility. Once the finish coat is dry and completed, it should be sealed with a water based sealer.

If you’re looking for a professional finish, then look no further than My Plasterers Melbourne. Our team of experienced plasterers will leave your walls and ceilings looking stunning – perfect for giving your home that luxurious feel. So why not give us a call today? We guarantee you won’t be disappointed.

Hand troweled gypsum plaster is ideal for large round “Old World Santa Fe Style” corners and will also work well for a contemporary flat wall with square corners. Gypsum plaster can be built up in single and multiple coats to achieve more depth than any other plaster system available.

It’s the big one. The plastering job that’ll make your neighbours green with envy – or maybe white with plaster dust. But don’t worry, My Plasterers Melbourne are on the case. We’re experts in the art of plastering and we’ll have your walls looking good as new in no time. So why not give us a call today?

Traditional plaster is applied over expanded metal lath and done in 3 coats to an overall thickness of 7/8″. The first coat is called the scratch coat, the second is the brown coat and the final coat is called the finish coat. There are only a few manufacturers of gypsum plaster in the U.S. The product consists of a powder that is similar to cement or lime and is packaged in paper sacks. The base coat material will usually contain a lightweight aggregate called perlite which is mixed with plaster sand and water. The finish coat is traditionally a finer gradation of gypsum, blended only with water. When applying traditional gypsum plaster it is important to control the environment by sealing up the room that the material is being applied in. Gypsum is very susceptible to shrinking, cracking and weakening if the temperature and humidity are not controlled. Direct sunlight and wind can cause gypsum to dry to rapidly. This will cause improper hydration which in turn creates a weak product and different suction rates, affecting the final color. It is important to keep the gypsum damp throughout the process up until the the finish coat. The finish coat is usually white and painted, however, it can be tinted using approved pigment to create integral color.

Some gypsum plaster systems can be applied directly to drywall with the use of bonding agents. This type of plaster, known as “veneer plaster”, is typically applied in one thin coat. Gypsum veneer plaster is fast and usually less expensive than traditional gypsum plaster. When applying a veneer plaster, all joints in the drywall must be prepared with joint compound or with the manufacturer’s recommended joint treatment materials. Once the joints are treated, a bonding agent is required. This is a water based PVA (polyvinyl acetate) or an acrylic bonding agent. PVA bonding agents are for interior use only because they re-emulsify when they get wet. PVA bonding agents are the most popular because they can be dry before the plaster coat is applied (as opposed to an acrylic bonding agent, which must still be wet when the plaster is applied, forcing the applicator to rush the process). A controlled environment is also important when applying a gypsum veneer finish, although some veneers are modified with acrylics, cement and chemicals, providing a better bond, higher compressive and tensile strengths, crack resistance, color retention and crack resistance. These modifications may make the product easier to work with and will give the applicator more flexibility. Once the finish coat is dry and completed, it should be sealed with a water based sealer.

My Plasterers Melbourne
1217/339 Swanston St, Melbourne VIC 3000, Australia
(03) 9999 9115
https://www.myplasterersmelbourne.com

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