We carefully select aggregates, cement, and additives, then cast them using precise moulds to keep every roster dimension consistent. Our production team follows strict mix designs and curing procedures to achieve optimal strength.
After casting, the blocks go through curing, surface finishing, and visual quality control. Only rosters that pass inspection are packed and shipped – ensuring your facade and interior projects look and perform at their best. Here is the manufacturing process :
We use two main mold models. The first model is a single-face mold, where the pattern is only visible from one side, while the back is flat with the vent holes. The second model is a double-face mold, where the same pattern is visible from both the front and back, making it suitable for applications that require an aesthetic appearance from both directions.
We utilize three main types of material. First, fine black natural sand, which produces an ash-gray colored vent when mixed with black cement. Second, dolomite derived from selected, finely ground natural stone powder, which, when combined with white cement, produces an off-white or creamy color. Third, terracotta material which originates from special fired clay powder, then mixed with black and white cement and given a touch of salmot for its distinctive color character.
As the main binder, we use black cement and white cement. Both types of cement have different characteristics and are selected to match the materials used, so that the vent’s strength remains optimal while also maintaining the desired final color.
In Plered, the entire vent (roster) manufacturing process is carried out manually. All materials are mixed with cement until they form a 3/4 wet (semi-dry) mixture, which is then manually tamped (beaten). This tamping stage is what determines the consistency and neatness of the final result. If the result does not meet the standard, the craftsman will immediately redo it until the vent quality meets expectations.
Even though the mixture is not too wet, its strength is maintained because there is still a watering process. Typically after 4 to 5 hours, the craftsman waters the vents so that the cement mixture truly blends with the material.
Lihat cara membuatnya di video di bawah, berikut detail produk dari dekat dan uji ketahanan seberapa kuat produk roster atau brizee block kami
The initial drying process usually takes about one day before the vents (rosters) can be removed from the molds. After that, the craftsmen often soak them again in water mixed with a special concrete strengthening liquid. This stage helps increase the vent’s strength, making it more resistant to load and weather.
The vents (rosters) are completely ready for shipping after undergoing a minimum drying period of 3 to 5 days. The hotter the weather, the faster the hardening process usually takes place, and the vents are ready sooner to be packed and loaded onto a truck or container.
Need the right vents (rosters) for your project?The Indo Roster Team is ready to help calculate your requirements, select the most suitable pattern and material, and transparently explain the production process. Tell us about your building style and project needs, and we will help you find a functional and aesthetic vent solution.
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Watch how our rosters are produced and installed on real projects.
This video demonstrates how our concrete breeze blocks perform in real conditions: resistant to cracking, capable of supporting wall structures, and maintaining clean alignment even in large modular installations. Ideal for facades, boundary walls, and any area requiring a balance of aesthetics and structural strength.
Engineered with dense concrete composition, our blocks resist cracking and chipping even under load-bearing wall configurations.
Precision molding ensures tight tolerances, allowing the blocks to stack evenly in large modules without shifting or warping.
Designed to withstand weather exposure, thermal expansion, and repeated handling during installation—ideal for facades and boundary walls.
Through this product detail video, you can get a closer look at the roster’s (Brizze Block) surface, wall thickness, the neatness of its corners, and the finishing quality of every side.
These details are essential to ensure the roster meets the standards of premium projects, whether for facades, fences, or interior applications.
