Stronger and Thinner Screeds
Our advanced additive technology creates stronger and thinner screeds that save valuable resources
Risks of weak screeds
In modern construction, screed strength and durability are just as crucial as speed. Without the use of performance-enhancing additives, conventional cement screeds quickly reach their technical limits. Moreover, the final strength of a screed largely depends on the quality of its raw materials – sand and cement – which can vary significantly by region and often lead to inconsistent and unpredictable results.
A screed with insufficient strength poses a considerable risk to any construction project. Instead of providing a reliable and stable base, cracks or deformations can occur, severely hindering subsequent work processes. In addition, untreated screeds must be applied in greater thicknesses to withstand medium to heavy loads, which in turn reduces the efficiency of underfloor heating systems and extends drying times.
How we solve these challenges
Our optimised screed systems start where conventional screeds reach their performance limits. While standard cement screeds typically max out at strength class CT-C20-F4, our advanced formulations push performance reliably to CT-C40-F6 and beyond. This ensures higher load-bearing capacity, dimensional stability, and long-term durability – even under demanding conditions. Finally, the screed thickness can be significantly reduced to a minimum without compromising performance. Brief summary of our optimized screeds:
- Approx. 70–80% of final strength is achieved after just 72 hours
- Final strength class of CT-C40-F6 and beyond
- Increased surface tensile strength
- Screed thickness can be significantly reduced thanks to enhanced strength
- Risk of cracks, deformations and alike is effectively minimised
When it comes to construction projects, time is often the most expensive commodity. Contractors, builders, and clients all share the same goal: finish strong, finish fast, and get the building back into use as soon as possible. Yet, traditional cementitious screeds come with one unavoidable challenge – drying time. Left untreated, a standard screed can take weeks, sometimes months, before it’s ready for floor coverings. That’s where our mach series comes in, changing the game by cutting down drying times and construction schedules.
Screed thickness comparison
The required thickness of a screed is determined by its compressive and flexural strength as well as the anticipated load.
- Untreated screeds: approx. CT-C20-F4
- Bondera-modified screeds: CT-C40-F6
According to common national standards, the screed of a commercial construction project with a load-bearing capacity of 5 kN/m² and a specified screed class of CT-C20-F4 requires a thickness of approx. 75 mm.
By using our additives – such as mach 3 or deka – and achieving a strength class of CT-C40-F6 or higher, the required screed thickness can be reduced to 45 mm.
This represents a reduction of about 40%. Such optimisation not only compensates for potential height restrictions but also saves considerable material – leading to lower costs and a reduced CO₂ footprint through the minimised cement content.
Load case tables
Discover what’s possible with our additive-enhanced screeds – from increased strength to reduced thickness – by exploring our three load case tables.
