Is plaster a costly material?

Plaster is more expensive than gypsum. Cement and cement lime plaster are cheaper alternatives. The substance used is chlorine, which is highly toxic in its pure form.

Is white cement the same as plaster?

White cement is not the same as plaster; it has a different consistency. The former, made of gypsum, is used to make casts for medical purposes (such as when repairing a fracture), while the latter is put on walls to make them shine.

Is plaster dangerous to one’s health?

Many people fear working with plaster because of its inherent dangers. Though it is not dangerous in the right hands, the substance is generally considered safe for everyday use. Anything embedded in the plaster runs the risk of being trapped and subjected to extreme heat.

Is plaster suitable to use on walls?

Plaster is the best option for repairing gaps in plaster walls because its properties are more likely to match the wall material. Plaster isn't often used to repair drywall, but it does a great job of reinforcing interior walls.

Is plaster easy to maintain?

When you want to clean your Venetian plaster walls, all you have to do is wipe them down. In order to lengthen the life of walls, routine maintenance such as cleaning and sealing is recommended.

Is Plaster A Good Choice For Bathroom Walls?

Plaster is a viable option for bathroom walls if applied correctly, with specific types such as cement and lime plaster offering excellent water resistance. It requires proper sealing to withstand moisture, especially in high-humidity areas like showers. While it provides a seamless, elegant finish, the right type of plaster and application method are crucial for long-lasting results.

Written by: Plastering National Team

Last Updated March 16, 2026

When it comes to designing a bathroom that lasts, choosing the right wall material is crucial. While tiles have long been the standard for bathroom walls, plaster is becoming a popular alternative. From smooth, modern finishes to rustic textures, plaster offers a unique aesthetic that tiles can’t quite replicate.

But can plaster withstand the high humidity and moisture in bathrooms? In this article, we’ll delve into the benefits and challenges of using plaster for bathroom walls, and explore which types are best suited for wet areas. By the end, you’ll know whether plaster is the right choice for your bathroom renovation.

Why Consider Plaster for Bathroom Walls?

Choosing the right material for your bathroom walls can make a huge difference in both the functionality and style of the space. Tiles are often the go-to choice, but plaster offers a sophisticated, seamless alternative that has been gaining popularity.

The Elegance and Customisation of Plaster

Seamless finish: Unlike tiles that create rigid grids, plaster provides a smooth, continuous surface.
Customisation: Plaster can be tinted with pigments or washed with colours to suit any design style, whether it’s sleek and modern or textured and rustic.

Example: In one of my past projects in New South Wales, we mixed natural pigments into the plaster to mimic the sandy tones of the coastal surroundings. This gave the bathroom a unique, organic feel that perfectly complemented the home’s beachside location.

A Low-Maintenance Option

Tiles can often be high-maintenance with grout lines that accumulate mould and dirt. On the other hand, plaster offers a smooth, grout-free surface that’s much easier to clean and maintain. This makes it an ideal choice for those looking for a more effortless, stylish bathroom.

Benefits for Water Resistance and Moisture Control

melbourne plaster

You might be thinking, “But isn’t plaster vulnerable to water?” The truth is, modern plaster can be moisture-resistant when properly applied and sealed. Here’s how:

Modern Plaster Technology: Waterproofing Made Easy

Proper sealing: The key to making plaster work in a bathroom is ensuring it’s properly sealed with a quality moisture-resistant product.
Effective for humid climates: In places like Queensland, where humidity is high, plaster has proven to be a reliable option when sealed correctly.

I’ve personally used plaster in bathrooms across various climates. For example, in coastal areas where humidity can be extreme, I’ve seen the difference a high-quality sealant can make—taking plaster from a risky choice to a reliable, water-resistant surface.

Lime Plaster: A Breathable Solution for Humid Areas

Lime plaster is a traditional material that has made a comeback, especially in heritage restorations and eco-conscious homes. Its breathability makes it a top choice for humid environments like bathrooms.

Personal Experience:
In a project in Cairns, I used lime plaster in a Queenslander home. The natural breathability of the material allowed moisture to be absorbed and released, which helped prevent mould and mildew. It’s particularly useful for older homes with brick walls that might trap moisture, which can lead to damp problems if not properly managed.

However, lime plaster isn’t as water-resistant as cement plaster, so it’s best used in areas with less direct water exposure, like walls outside of the shower area.

Types of Plaster Best Suited for Bathroom Walls

is plaster a good choice for bathroom walls

Not all plaster is created equal, and choosing the right type is essential for achieving a functional, durable bathroom. Let’s explore the best types of plaster for bathroom walls.

Type of Plaster	Best For	Pros	Cons
Gypsum Plaster	General bathroom walls, powder rooms	Smooth, lightweight, easy to apply	Not suitable for high-moisture areas without sealing
Lime Plaster	Tropical or coastal climates, heritage homes	Breathable, mould-resistant, eco-friendly	Not highly water-resistant for wet areas like showers
Cement Plaster	High-moisture areas (e.g., shower walls)	Durable, water-resistant, long-lasting	Heavy, industrial look, requires skilled application
Venetian Plaster	Luxury bathroom finishes	Polished, marble-like finish, adds elegance	Absorbent, requires special treatment for wet areas
Tadelakt	Showers or high-moisture areas, luxurious finishes	Waterproof, resistant to mildew, seamless finish	High cost, labour-intensive application
Waterproof Plaster Systems	Modern bathrooms with high moisture exposure	Specifically designed for wet areas, long-lasting	Requires professional application

Gypsum Plaster – Ideal for Dry Areas

Gypsum plaster is smooth, lightweight, and ideal for areas of the bathroom that don’t experience a lot of moisture, like behind mirrors or in powder rooms. However, I’ve seen clients use it in shower areas only to experience issues with moisture over time.

Example: In a renovation in Newtown, I saw first-hand how unsealed gypsum plaster started showing water damage in less than a year. This was due to the high moisture exposure in the bathroom. While gypsum plaster works well in drier spaces, it’s best to avoid it in shower zones unless sealed properly.

Lime Plaster – Breathable and Eco-Friendly

Lime plaster is perfect for bathrooms in areas with high humidity, like Queensland. It allows moisture to breathe through the walls, which is a great way to prevent mould build-up.

Example: In Cairns, we used lime plaster in a heritage-style bathroom. The home’s coastal location meant constant humidity, but the lime plaster absorbed moisture and kept the space dry. The natural properties of lime plaster make it an excellent choice for eco-conscious homes, though it’s not ideal for wet areas like showers.

Cement Plaster – The Heavyweight for High Moisture Areas

Cement plaster is known for its durability and water resistance, making it the top choice for wet areas like showers. It’s not the easiest material to work with, but its strength and moisture protection make it an excellent choice for bathroom walls that see regular water exposure.

Example: In a recent project in the Blue Mountains, cement plaster was used in a client’s shower walls. The area receives a lot of moisture, but the cement plaster has held up beautifully, providing excellent resistance to water damage.

Venetian Plaster – Luxury Finish for General Bathroom Walls

For a touch of elegance, Venetian plaster provides a smooth, marble-like finish that adds luxury to any bathroom. However, it’s not suitable for wet areas like showers unless treated with a protective coating.

Example: I used Venetian plaster in a high-end bathroom renovation in Bondi. The luxurious, polished look completely transformed the space. However, because Venetian plaster is absorbent, it’s crucial to maintain it properly to avoid water damage in wet areas.

Tadelakt – The Moroccan Waterproof Plaster

Tadelakt is a traditional Moroccan plaster that’s known for its waterproof properties, making it ideal for high-moisture areas like showers. While beautiful, Tadelakt requires skilled application and regular maintenance to keep it looking its best.

Example: In a luxury bathroom project in Byron Bay, we used Tadelakt to create a seamless, glossy finish in the shower. It’s one of the most stunning finishes I’ve worked with, though the application process is very involved and the cost can be quite high.

Waterproof Plaster Systems – Ultimate Protection for Bathrooms

For bathrooms where moisture resistance is a top priority, specialised waterproof plaster systems are the best option. These systems are designed specifically for wet environments and offer long-lasting, low-maintenance solutions.

Example: For a modern bathroom renovation, we used Luna Plaster’s Hydro plaster system. This 100% waterproof plaster stood up beautifully to constant water exposure in the shower without any issues. It’s the ideal choice for anyone looking for a durable, moisture-resistant finish.

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