Plan Your Work:
- Timing is Everything: Work early during the cooler temperatures and follow the shade around the building, avoiding direct sunlight and wind.
- Storage Matters: Store products in a cool area and use cool or iced water when mixing. Let hot water run out of the water supply before using.
Drying Considerations:
- Prevent Uneven Drying: Differences in drying rates can cause aesthetic issues. Scaffolding, for example, creates shadow lines where the finish dries more slowly. To mitigate this, sheet the exterior to limit uneven sun exposure.
Maintain Sufficient Manpower:
- Quick Application: Hot weather decreases working times, so ensure enough workers are available to prevent ‘cold’ joints and snap drying.
Base Coats, Monocouche & Thin Coat Render
These products require water to allow the binder to hydrate efficiently. Here’s how to ensure a smooth application:
Pre-Soak the Substrate:
- Reduce Absorption: Soaking the substrate first reduces water absorption and increases the open time for finishing.
Mist the Surface:
- Hydrate Properly: Once finished and starting to set, spray the surface with a fine mist of clean, cold water. This replaces evaporated water and allows the binder to hydrate sufficiently, ensuring a fissure-free finish.
- Repeat Mist Curing: In hot weather, mist the surface every 20 minutes until conditions cool. For very hot periods, mist several times a day for a few days.
Silicone & Acrylic Thin Coat Render Systems
For optimal results with silicone and acrylic thin coat render systems:
- Preparation: Always use a primer before applying the render.
- Add Water: Mix thoroughly, adding 5% clean water per tub.
- Time Management: Finish the product within 5 to 15 minutes of application to avoid a closed and uneven appearance.
Technical Data
Base Coats:
- Ready to Finish: 2 to 8 hours @ +3°C to 25°C
- Humidity Requirement: Less than 95%
- Application Temperature: +3°C
Monocouche:
- Ready to Finish: 3 to 16 hours @ +5°C to 25°C
- Humidity Requirement: Less than 85% for a minimum of 24 hours
- Application Temperature: +5°C to 25°C
Thin Coats:
- Ready to Finish: 10 to 40 minutes @ +5°C to 25°C
- Humidity Requirement: Less than 85% for a minimum of 24 hours
- Application Temperature: +5°C to 25°C
Surface Temperature Considerations:
- Hot Weather: Surface temperature can exceed ambient temperatures by +20°C to 30°C in full sun.
- Cold Weather: Surface temperatures can drop below ambient levels.
These guidelines provide general advice. For a complete product specification, please contact our Technical Team.
With over 25 years experience within the construction sector, Andrew Rawsthorne is one of the UK’s leading experts with a wealth of knowledge and expertise. As a seasoned professional, he is dedicated to driving innovation and excellence in exterior finishes, ensuring that ecorend remains at the forefront of the industry. Through his strategic leadership and commitment to customer satisfaction, Andrew plays a pivotal role in shaping the company’s success and delivering exceptional results for customers across the UK.
