Screed Drying Time Calculator
Screed drying times can vary significantly depending on the type of screed, thickness, environmental conditions, and whether additives are used. Here's a table outlining the drying times for different types of screeds:
| Screed Type | Average Drying Time | Notes |
|---|---|---|
| Traditional Sand/Cement | 1 day per mm (up to 40mm thick) beyond that, 2 days per mm | Drying time increases for thickness beyond 40mm. Typically requires 7-10 days before light foot traffic is allowed. |
| Fast-Drying Cementitious | 1 to 5 days per mm (depending on brand/product) | Fast-drying additives speed up the process. Ensure to check manufacturer's guidelines. |
| Anhydrite (Calcium Sulphate) | 1 day per mm up to 40mm, beyond that, 2 days per mm | Sensitive to moisture, must be sealed before applying certain floor coverings. |
| Liquid Flowing Screed | 1mm/day up to 40mm, then 0.5mm/day beyond 40mm | Requires good ventilation to aid drying. |
| Polymer-Modified Screed | 3 to 5 days depending on thickness and brand | Quick setting for specific applications; manufacturer's instructions essential. |
| Self-Levelling Screed | 1 to 3 days depending on thickness and conditions | Thin layers (up to 10mm) generally dry quicker. |
| Thermal or Insulation Screed | Varies greatly (commonly 7-14 days) | Depends on material composition and thickness, tends to be slower drying. |
| Magnesium Oxychloride (Magnesite) | 1 day per mm | Typically used for lightweight applications but sensitive to moisture. |
Factors Affecting Drying Time:
- Thickness: Thicker screeds take longer to dry.
- Ambient Conditions: Temperature, humidity, and ventilation all influence drying times.
- Additives: Special additives can significantly accelerate or slow down drying times.