How Long Does It Take for Plaster to Dry?

Home and Garden

Plastering is an essential process in construction and renovation projects, providing a smooth and durable finish to walls and ceilings. Whether you are a homeowner embarking on a DIY project or a professional plasterer, understanding the drying time of plaster is crucial. In this article, we will delve into the factors that affect the drying time of plaster, the different types of plaster, and offer tips for speeding up the drying process. Let’s explore!

The Factors Affecting Plaster Drying Time

Several factors influence the drying time of plaster. It is essential to consider these factors to estimate the time required for the plaster to dry completely:

1. Type of Plaster

The type of plaster used plays a significant role in determining the drying time. There are various types of plaster available, including:

  • Lime Plaster: Lime plaster is a traditional material known for its breathability and flexibility. It typically takes longer to dry compared to other types of plaster.
  • Gypsum Plaster: Gypsum plaster, also known as plaster of Paris, is widely used due to its quick drying properties. It sets rapidly and dries faster than lime plaster.
  • Cement Plaster: Cement plaster is a mixture of cement, sand, and water. It dries relatively faster than lime plaster but slower than gypsum plaster.

The type of plaster you choose will have a direct impact on the drying time.

2. Thickness of the Plaster

The thickness of the plaster layer applied also affects the drying time. Thicker layers take longer to dry compared to thinner ones. It is crucial to follow the manufacturer’s guidelines regarding the recommended thickness for optimal drying time.

3. Humidity and Temperature

The environmental conditions, such as humidity and temperature, significantly influence the drying time of plaster. Higher humidity levels and lower temperatures tend to prolong the drying process, while lower humidity and higher temperatures expedite it.

4. Ventilation

Proper ventilation is essential to ensure adequate air circulation, which aids in the drying process. Good airflow helps evaporate the moisture in the plaster more efficiently, speeding up the drying time.

How Long Does Each Type of Plaster Take to Dry?

The drying time of plaster varies depending on the type of plaster used. Let’s explore the estimated drying time for each type:

1. Lime Plaster

Lime plaster typically takes longer to dry compared to other types of plaster. On average, lime plaster can take anywhere from 14 to 30 days to dry completely. However, it is essential to note that the drying time may vary depending on the thickness, humidity, and temperature conditions.

2. Gypsum Plaster

Gypsum plaster, also known as plaster of Paris, is renowned for its quick-drying properties. It usually sets within 20 to 30 minutes and dries completely within 72 hours. However, factors like thickness, humidity, and ventilation can impact the drying time.

3. Cement Plaster

Cement plaster generally takes longer to dry compared to gypsum plaster. On average, it may take around 7 to 14 days for cement plaster to dry completely. However, the drying time can vary based on the thickness, humidity, and temperature conditions.

How long Does New Plaster Take to Dry Out before You can paint it?

Tips for Speeding Up the Plaster Drying Process

If you are looking to expedite the drying time of plaster, here are some helpful tips:

1. Increase Ventilation

Ensure proper airflow by opening windows, using fans, or employing dehumidifiers. Improved ventilation helps remove moisture from the plaster, accelerating the drying process.

2. Use Heating Devices

Using heating devices, such as heaters or heat lamps, can aid in drying the plaster faster. However, be cautious not to place them too close to the plaster, as excessive heat can cause cracks or uneven drying.

3. Monitor Humidity Levels

Keep an eye on the humidity levels in the room. Lowering humidity by using dehumidifiers or air conditioners can facilitate quicker drying of the plaster.

4. Follow Manufacturer’s Guidelines

Always adhere to the manufacturer’s instructions regarding the recommended drying time and thickness for the specific type of plaster you are using. Following these guidelines ensures optimal results.

5. Patience is Key

While it may be tempting to rush the drying process, it is crucial to exercise patience. Allow sufficient time for the plaster to dry naturally, as premature removal of supports or painting can lead to compromised results.


Understanding the drying time of plaster is vital to ensure successful construction and renovation projects. Factors such as the type of plaster, thickness, humidity, and temperature significantly impact the drying time. While lime plaster takes longer to dry, gypsum plaster and cement plaster have relatively quicker drying times. By following the tips mentioned above, you can expedite the plaster drying process while maintaining the quality of the finish. Remember, patience and proper adherence to manufacturer’s guidelines are key to achieving outstanding results. Happy plastering!

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