When planning a flooring project, choosing the right type of screed is crucial. Cement and gypsum screeds are two popular options, each with distinct properties and advantages. In this blog, we’ll explore the differences between the two to help you decide which is better suited to your needs.
Cement Screeds
Cement screeds are made from a mix of cement, sand, and water. They have been a staple in construction for decades, offering durability and versatility. Here are some key features of cement screeds:
Strength and Durability: Cement screeds are highly robust, making them ideal for areas subject to heavy traffic or loads, such as warehouses and industrial spaces.
Compatibility with Wet Areas: These screeds are moisture-resistant, making them a great choice for bathrooms, kitchens, and outdoor spaces.
Longer Drying Time: Cement screeds typically take longer to dry compared to gypsum screeds. This extended drying time can delay subsequent flooring work but ensures a solid base once cured.
Shrinkage Risks: Cement screeds are prone to shrinkage as they dry, which may lead to cracks if not applied correctly. Using the right techniques and additives can mitigate this risk.
Gypsum Screeds
Gypsum screeds, also known as anhydrite screeds, are made from gypsum-based materials mixed with water and aggregates. They are gaining popularity for modern construction projects. Here’s what you need to know:
Fast Drying: Gypsum screeds dry more quickly than cement screeds, reducing project timelines. However, they still require proper curing to achieve their full strength.
Smooth Finish: These screeds offer a smoother surface, making them ideal for underfloor heating systems and for projects requiring a level and uniform finish.
Low Shrinkage: Unlike cement screeds, gypsum screeds have minimal shrinkage, reducing the likelihood of cracks.
Moisture Sensitivity: Gypsum screeds are not suitable for areas with high moisture exposure, such as wet rooms or outdoor spaces, as they can degrade when exposed to water.
Choosing the Right Screed for Your Project
For Wet or Outdoor Areas: Cement screeds are the clear winner due to their superior moisture resistance.
For Faster Project Timelines: Gypsum screeds’ quicker drying time can help keep projects on schedule.
For Underfloor Heating: Gypsum screeds provide better thermal conductivity and a smoother finish, making them ideal for this purpose.
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