One-Coat Render and Projected Aggregate: Façade Finish and Waterproofing in One Step
Quick answer: one-coat render is a continuous coating that decorates and waterproofs the façade in a single layer, with no need for a prior base coat. The final finish is defined by the aggregate projected onto it: the fine gravel that gives it texture and color. Choosing that gravel well — size, material, and tone — is just as important as the base mortar, because it's what you actually see.
The Base Mortar
One-Coat Render for Projected Aggregate is applied directly onto the substrate, with no prior base coat, saving time on site. It waterproofs the façade while maintaining its breathability, preventing moisture from getting trapped inside the wall.
The Aggregate: The Finish You See
Projected Aggregate for One-Coat Render is a fine gravel of natural stones (marble, ophite, and other selected minerals) prepared specifically to be projected onto the fresh mortar, achieving a continuous, uniform, natural-looking finish.
How the System Works
The one-coat render is applied directly onto the façade's substrate.
While the mortar is still fresh, the decorative aggregate is projected onto it.
The aggregate becomes embedded in the mortar, forming a single finish that combines waterproofing and decoration in the same step.
Advantages Over the Traditional System
Fewer construction steps: no prior base coat or a separate decorative paint layer is needed.
Real waterproofing: the mortar seals the façade against rain while still allowing it to breathe.
Natural, long-lasting finish: the natural stone aggregate doesn't fade or lose color from sun exposure, unlike a conventional paint.
Frequently Asked Questions
Can the one-coat render be applied directly onto brick or concrete block?
Yes, it's designed precisely to be applied directly onto the substrate with no prior base coat, as long as the surface is clean, free of dust, and in good condition.
Which aggregate should I choose for my façade?
It depends on the effect you want: there are gravels of different sizes, colors, and stone types (marble, ophite...). The coarser the aggregate, the more texture and relief the final finish will have.
Does this system replace an ETICS thermal insulation system?
No, the one-coat render decorates and waterproofs the façade, but doesn't add extra thermal insulation. If you're looking to improve insulation, consider an ETICS system with an insulation panel and then this type of finish over it.
