Why Plaster Over Drywall?

Why Plaster Over Drywall?

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When deciding which type of wall covering to install, the first question to ask is: why plaster over drywall? Among other reasons, this is the most durable choice for interior walls and ceilings. Other reasons include: durability, fire-resistance, and cost.

Let’s discuss each of these factors in more detail. Which one is the better option for you? Here are some tips to decide for yourself. Consider these benefits when deciding whether to use plaster or drywall in your next project.


Plaster is a common finish choice for public buildings. It’s easy to install and has very little risk of damage. Its ease of installation makes it a quick and convenient choice for any project. Unlike drywall, which requires extensive sanding and finishing, plaster does not require any construction mess. Plus, unlike drywall, plaster has a low thermal conductivity, making it ideal for high-traffic areas.

However, plaster requires different installation techniques. In order to cover a large surface area, it’s set over a layer of blue board. Blue board is similar to sheetrock but is specially formulated to handle the moisture found in wet plaster. It bonds tightly with plaster, so multiple layers may be needed. A drywall installer may need several coats of plaster to cover an entire wall area. However, a good plaster contractor will provide a mix of these services.

Plaster is not as user-friendly as drywall, but it can be easily installed by a professional. Basic plaster applications can be done on your own, but if you want a unique shape, you may need to hire a plasterer. It’s also easier to customize your space with plaster, since it can be molded into almost any shape. Unlike drywall, plaster requires no sanding after application. In addition, plaster is faster to apply and clean up than drywall.

A plaster finish lasts for centuries and is more durable than drywall. This is why many historic homes still have original plaster that doesn’t require any special maintenance. In contrast, drywall is easily damaged by water and fire and is susceptible to crumbling and holes. Plaster is also much more resistant to damage from fire and water. Moreover, it looks more beautiful than drywall. And while drywall might be easier to clean and repair, plaster will keep your home looking new for decades.

Plaster repair is a tricky process. You have to cut out the damaged patch without damaging the surrounding plaster. It may also require the replacement of the backing and lath. Plaster tends to change color with age, so if you choose to paint your walls after the repair, you will have a new patch of plaster that will stand out and be noticeable. Therefore, plaster repair is important when restoring walls. Just remember that you should only repair plaster damage with an expert.


While the cost of plaster over drywall is relatively high, this alternative building method is not as expensive as drywall. The average cost is three to six dollars per square foot. A great surface for plaster is a concrete wall. Ensure that the concrete is dust free and un-damaged before plastering. To make the plaster stick to the concrete wall, wet it with water first. Then apply two coats of plaster.

Plaster is the most common interior decorating material. It creates smooth, plain surfaces for walls, windows, door surrounds, and other areas. Costs vary according to the type of plaster needed and the surface that needs to be prepared before the plastering process. The hardest-to-reach areas may require 50% more than the average cost. Aside from the plaster itself, additional costs may occur if you want to prepare the surface for the process.

The cost of plastering varies depending on the materials used. Wet plaster, which is a mixture of cement and lime, will cost about five to ten dollars per square foot. This type of plastering requires more skill than dry plaster and requires reframing. Due to its chemical reaction, plaster is more difficult to sand and requires more preparation. However, a good plaster job can greatly increase the value of a home.

There are several advantages to choosing plaster over drywall. The former is easier to install and has fewer problems with noise. Drywall sheets can be difficult to handle and require two people to install. A skilled plasterer will charge more for this type of material. Additionally, skilled plasterers charge higher prices for their services. In general, labor costs account for 35 to sixty percent of the cost of installing drywall, while plaster costs are closer to ninety percent.

A base coat is essential for a successful plaster. Without one, the plastering will lose moisture and crack. A base coat made of PVA emulsion is the best choice for plastering. In addition, a few drops of food colouring in the PVA emulsion will give a slight tint. This way, you can see which areas are covered. If you are unsure about the amount of plaster to apply, you can always use one or two coats.


Plastering is faster than drywall, but it takes more time. Unlike drywall, which sets in two to three hours, plaster requires a full day of work before the finish is ready. Plaster is also more porous than drywall, and stains can bleed through the topcoat of paint. Additionally, a different primer is needed for plaster. In addition to the above disadvantages, plaster can be expensive, ranging from $2 to $10 per square foot.

Another advantage of plaster is that it can be applied wet. This makes it easier to work with in unique shaped or small spaces. Furthermore, it can be used in public buildings. Plaster is also a great option for public-use buildings because it can last for decades. However, this does mean that plaster is not suitable for DIY projects, and you should always consider a professional plasterer. Once the plaster is on the wall, it can be molded into any shape.

Another benefit of plaster over drywall is that it is easier to install. Plaster does not create much dust, and it does not require sanding. This means that you can plaster walls in a shorter time. Furthermore, you can apply several coats of plaster before the bottom layer has completely dried. This makes the process faster, and less messy than drywall. And if you have a special design for your home, plaster will be a great choice for you.

Plastering is a bit more expensive than drywall, but the end result is well worth the extra cost. Whether you choose plaster for your home or drywall for an apartment, plaster will enhance your home. If you plan to paint it, you can choose the color of the walls. There are many advantages to plaster. In a traditional home, drywall is fine. However, in high-end properties, plaster will be difficult to match. Furthermore, drywall is easier to hang items.

One of the best benefits of plaster over drywall is its durability. Unlike drywall, plaster has been designed to last for centuries. Unlike drywall, it is not vulnerable to fire and water damage. Its consistency makes it very durable and fire-resistant. It also makes it easier to hang pictures and other items. Unlike drywall, plaster has a softer look and is less likely to dent easily. Another great benefit of plaster over drywall is that it is easier to finish than drywall, making it a better choice for curved surfaces.


Plaster is a great way to protect your walls from fire. While gypsum-based plasters offer better protection than Portland cement-based plasters, both can be used to create one-hour fire-rated walls. They differ in thickness, however. Plasters with gypsum as their base can be a little thinner than Portland cement-based plasters, and they require a five to seven-inch thickness.

When it comes to fire-resistance, plaster is better than drywall. It is more durable than drywall, and it can last for decades without replacement. However, there are disadvantages to plaster. Plaster walls are harder to hang pictures and artwork because nails can crack them, so you should use adhesive or screws instead. The added cost can be offset by the added privacy that plaster provides. If you’re building a multiunit home, consider plaster.

The SRK model provides more accurate results, especially for gypsum plasterboard wall assemblies. However, gypsum has a tendency to be dehydrated in a fire, leading to water vapour production that disperses throughout the fire compartment. Nevertheless, this phenomenon is generally ignored in CFD simulations of gypsum plasterboard wall assemblies. Besides, the SRK model uses a two-storey, multi-compartment lightweight drywall building.

Fire-resistance of plaster over the drywall is very important for safety. It gives people enough time to escape a building if a fire occurs. In addition, it is a good idea to specify fire-resistant drywall when building your home. Some building codes require this because certain rooms are more susceptible to fire. However, the cost of installing fire-resistant drywall is minimal compared to the cost of other construction materials.

Drywall, or gypsum board, has a special purpose in protecting your home against a fire. Its composition contains 21% water and blocks the passage of heat through the wall. Whenever fire spreads through gypsum, the water will be released from the gypsum and char the walls. The resulting water vaporization will cause the drywall to lose up to 50% of its strength, and may even burn.

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