Automatic self-propelled systems for the mixing and pumping of:
- Lightweight subfloors (foam concrete and polystyrene-based)
- Pre-mixed self-levelling screed
Available versions:
Truck versions
- MSA 15 A PTO
- MSA 22 A PTO
- MSA 13.9 A PTO
- MSA 20 PB PTO
- MSA 20 A M PTO
Pre-mixed self-levelling screeds and subfloors
The Overmat A-series system is an automatic mixer for screed that enables lightweight subfloors to be poured with no hassle and total precision.
The Overmat range includes different types of systems and screed mixers to satisfy the customer’s needs. These advanced screed machines offer different configurations depending on production requirements.
The variables may concern the mixing of the dough: from the single mixing tank system to the double mixing system, so as to be able to increase both the hourly production and the quality of the final product.
Completely automated, thanks to their versatility our automatic mixers for screed allow the operator to produce lightened substrates in all its variables, from a 100% foam product to a polystyrene-only product, as well as a mixed product. All of which can be controlled automatically and with dosages of the various certifiable components.
The features present in the 22 A PTO system (or 13.9 A PTO based on the chosen configuration) are important. The only system on the market capable of producing both a lightweight product (foam and polystyrene) and a pre-mixed self-levelling screed, even on the same day, loading two different binders into the two independent compartments.
Designed for versatility, the automatic mixers for screed in the Overmat A-series facilitate a streamlined and high-quality screed mixing process, accommodating various types of screed formulations.
The entire process is recorded in the system computer and can also be viewed on the internet, using a special data SIM installed on the machine.
The lightweight substrate is used as an intermediate level between the floor and the screed. It is made using a cement binder dosed at 250-350 kg/m3, a foam (obtained using a surfactant additive) and can possibly be integrated with a low specific weight insulator (polystyrene, perlite, rubber, cork, etc.).
The Overmat A-series screed mixers ultimately stand out for their unparalleled reliability and efficiency.
FAQ – Frequently Asked Questions
What is a screed mixer?
A screed mixer is a self-propelled machine that combines raw materials (cement or anhydrite binders, water, and additives) directly on site, then pumps the finished mix to where it’s needed. This eliminates the need for manual batching, reduces material waste, and ensures a consistent, ready-to-pour product from the first batch to the last. Because mixing and pumping happen in a single automated system, screed mixers are widely used on sites where large volumes of material need to be produced quickly and to a repeatable standard.
How does an automatic screed mixer work?
The system doses each component (binder, water, foam or polystyrene) automatically according to a pre-set recipe, removing the variability of manual measuring. Once dosed, the materials are mixed in the onboard tank to the correct consistency, then pumped through hoses directly to the application area, even at a distance or height from the machine itself. Every stage is controlled and logged by the machine’s onboard computer, so the operator can monitor production in real time without needing to intervene manually.
What’s the difference between a lightweight subfloor and a self-levelling screed?
A lightweight subfloor is an intermediate layer poured between the structural floor and the finished screed, typically made with foam concrete or a polystyrene-based mix. Its main purpose is to reduce the overall weight load on the structure while improving thermal and acoustic insulation, particularly useful in renovation projects with limited floor height. A self-levelling screed, by contrast, is the finishing layer poured on top, formulated to spread and settle evenly under its own weight, creating a flat surface ready to receive tiles or other flooring finishes.
Which Series A model should I choose for my job site?
It depends on required output and truck configuration: the MSA 15 A PTO (3-axle, up to 15 m³ binder) suits smaller sites, while the MSA 22 A PTO and MSA 13.9 A PTO (4-axle) offer higher binder volume and, in the 13.9’s case, an additional 9 m³ extra compartment for dual production in the same day.
What’s the difference between the “PTO” and “A M PTO” versions?
All Series A models are driven via the vehicle’s own P.T.O. (no separate engine needed). The MSA 20 A M PTO variant is configured for a lower foam concrete output (up to 12 m³/h vs. 25 m³/h on other models) and does not include self-levelling screed production, check the technical table to match capacity to your needs.
What is the maximum hourly production of the Series A screed mixers?
Depending on the model and material: up to 25 m³/h for foam concrete, 14 m³/h for polystyrene-based lightweight subfloors, and 10 m³/h for self-levelling screed (not available on the MSA 20 PB PTO and MSA 20 A M PTO).
Do I need to subtract the truck’s weight from the machine specifications?
Yes, the tare weights listed (6.5–7.5 tons depending on model) refer to the mixing/pumping equipment only and exclude the vehicle itself.
Video
Photo Gallery
Technical table
| MSA | 15 A PTO | 22 A PTO | 13.9 A PTO | 20 PB PTO | 20 A M PTO |
| Binder volume | 15 m3 | 22 m3 | 13 m3 | 20 m3 | 20 m3 |
| Extra binder volume | / | / | 9 m3 | / | / |
| Dosing mixer | 300 lt | 300 lt | 300 lt | 300 lt | / |
| Pumping mixer | 600 lt | 600 lt | 600 lt | 1000 lt | 1000 lt |
| Water tank | 2000 lt | 2000 lt | 2000 lt | 2400 lt | 2000 lt |
| Foam concrete production *1 | Up to 25 m3/h | Up to 25 m3/h | Up to 25 m3/h | Up to 25 m3/h | Up to 12 m3/h |
| Production of lightweight subfloor with polystyrene *1 | Up to 14 m3/h | Up to 14 m3/h | Up to 14 m3/h | Up to 14 m3/h | Up to 14 m3/h |
| Self-levelling production *1 | Up to 10 m3/h | Up to 10 m3/h | Up to 10 m3/h | / | / |
| Vehicle | 3 axles truck | 4 axles truck | 4 axles truck | 4 axles truck | 4 axles truck |
| Driving | Vehicle P.T.O. | Vehicle P.T.O. | Vehicle P.T.O. | Vehicle P.T.O. | Vehicle P.T.O. |
| Tare *2 | 6,5 ton *3 | 7,5 ton *3 | 7,5 ton *3 | 7,5 ton *3 | 6,5 ton *3 |
