Pre-Stressed
Predalle
Roofing Panels
Factory-engineered pre-cast slabs that deliver superior structural performance, faster programmes, and an immaculate fair-face soffit — manufactured right here in Malta.
Schematic cross-section — indicative dimensions
What is Predalle?
Predalle is a pre-stressed, pre-cast roofing and flooring panel system manufactured under factory-controlled conditions. Thin, high-strength concrete elements are pre-tensioned with steel strands before casting, then delivered to site ready to place.
Once positioned on their bearings, the panels act as permanent formwork. Additional reinforcement is laid across and between panels, services are co-ordinated, and a second-phase in-situ concrete topping is poured to create a composite structural slab — delivering performance that consistently surpasses equivalent cast in-situ solid slabs.
- No temporary props requiredPanels self-support for most standard spans, removing the need for costly propping systems on site.
- Made to measure, every timeVariable lengths, widths, and thicknesses between 6 and 10 cm to match your engineer’s exact requirements.
- Composite structural actionThe roughened top surface creates a true mechanical bond with the second-phase pour, forming a robust monolithic slab.
Panel Layer Breakdown
All panels include: 15 mm chamfered edges, factory-fitted lifting hooks, transversal reinforcement, and an intentionally roughened upper surface — produced to CE marking standards.
Built-in Advantages
From the Factory Floor
Every Predalle panel leaves B&B’s manufacturing facility engineered to outperform — giving you structural, programme, and quality gains on every project.
Superior Structural Performance
Pre-stressing delivers reduced section depths and near-zero differential deflection, consistently exceeding the performance of equivalent cast in-situ solid slabs under design loads.
Faster Construction Programme
Panels arrive on site ready to place. No propping, no waiting for in-situ concrete to cure before loading — cycle times reduce significantly, cutting labour costs and programme duration.
Immaculate Fair-Face Soffit
The lower surface is cast smooth against precision steel formwork, giving a consistent, board-mark-free finish that is ready for direct decoration or plastering with minimal preparation.
Easy M&E Integration
The open zone above the panels before the topping pour allows straightforward installation and co-ordination of embedded electrical and mechanical fittings with zero cutting or coring.
Factory Quality Control
Every panel is manufactured under controlled conditions with consistent mix designs, precise strand tensioning, and rigorous QC checks — eliminating the variability of on-site concrete work.
Environmentally Responsible
B&B’s operations are aligned with ISO 14001:2015. Lean factory production minimises material waste compared to traditional site-cast methods.
Panel Specifications
All panels are manufactured to engineer’s design and project-specific requirements. The values below are indicative of our standard production range.
| Panel Thickness | 6 cm – 10 cm |
| Lengths | Variable · to project requirements |
| Widths | Variable · to project requirements |
| Soffit Finish | Smooth fair-face concrete |
| Top Surface | Roughened for composite bond |
| Chamfers | 15 mm on all edges |
| Reinforcement | Pre-stressing strands + transversal steel |
| Lifting Provision | Factory-fitted lifting hooks |
| Quality Standard | CE Marked · ISO 9001:2015 |
| Environmental Mgmt. | ISO 14001:2015 |
panels to engineer’s design and span requirements.
Panels: smooth fair-face soffit · roughened top
surface · 15 mm chamfered edges · transversal
steel · lifting hooks · CE marked.
QA: ISO 9001:2015 · ENV: ISO 14001:2015.
Need project-specific details?
Our team can prepare technical schedules, span tables, and co-ordination details tailored to your structural engineer’s requirements.
Contact our team →Four Steps. Fast Cycle. Clean Result.
The Predalle installation sequence is straightforward and repeatable, giving site teams a predictable rhythm and project managers a faster programme.
Bearings are prepared and setting-out lines established to ensure accurate panel placement, correct spans, and proper edge conditions.
Predalle panels are craned into position onto their designed bearings. The lifting hooks allow safe, precise placement without the need for temporary propping.
Additional reinforcement is placed across the joints. Electrical conduits, pipes, and embedded services are co-ordinated and fixed in the open zone above the panels.
The second-phase concrete topping is poured over the panels. The roughened surface creates composite action, forming a robust monolithic slab as the topping cures.
Where Predalle Performs
From residential apartment blocks to large commercial floors, Predalle is the slab system of choice for Malta’s most demanding projects.
Residential & Apartment Blocks
The clean soffit is particularly valued in residential projects. Faster floors mean earlier handover and a superior finished ceiling with no board-mark remediation.
Commercial & Office Floors
Wide-span capabilities and easy services integration make Predalle ideal for commercial floor plates where open-plan MEP co-ordination is critical to the brief.
Basements & Podium Slabs
The composite slab system is well suited to basements and podium levels where structural efficiency and watertight topping integration are high priorities.
Institutional & Public Projects
Schools, care homes, and public buildings benefit from Predalle’s programme savings and reduced on-site labour requirements during floor construction cycles.
Certified to the Highest Standards
B&B Construction’s manufacturing processes are independently audited and certified — giving your project team full confidence in every panel delivered.
CE Marking
All Predalle panels are CE marked in compliance with the relevant European Standards, confirming conformity of production and fitness for purpose across EU construction projects.
Learn more →ISO 9001:2015
B&B’s quality management system is aligned with ISO 9001:2015, ensuring consistent processes, rigorous in-production testing, and continuous improvement across all manufacturing operations.
View certification →ISO 14001:2015
Environmental management is aligned with ISO 14001:2015. B&B was recognised with an XCA Commendation for Dedication to Sustainability, reflecting a genuine commitment to responsible manufacturing.
Quality overview →Predalle FAQs
Practical answers for architects, structural engineers, quantity surveyors, and site teams.
Can’t find your answer here? Call our team directly on (+356) 2142 2041/2 or use the contact form on our website.
Is Predalle suitable for intermediate floors as well as roofs?
Yes — Predalle is extensively used for both roofing and intermediate floor slabs. Your structural engineer will confirm suitability based on span, design loads, bearing conditions, and interface detailing requirements specific to your project.
Do the panels need temporary propping on site?
For the majority of standard spans, Predalle panels self-support during erection and the topping pour without the need for temporary propping — one of the key programme and cost advantages of the system. Your engineer will confirm this for your specific spans and loads.
How are electrical and mechanical services installed?
The open zone above the panels — before the in-situ topping is poured — provides a clean, accessible space to install conduit, pipes, and embedded services. This is planned in co-ordination with your MEP consultant and structural engineer early in the design process.
How does the roughened top surface create composite action?
The intentionally roughened upper surface creates a mechanical interlock with the second-phase in-situ concrete topping as it cures. Combined with the transversal reinforcement, this creates a composite slab that behaves as a monolithic unit — significantly outperforming non-composite systems.
What other pre-cast products does B&B manufacture?
Alongside Predalle, B&B manufactures beams, Omnia panels, Bubble Deck panels, and fully bespoke elements to client specification. The company also produces ready-mixed concrete and hollow concrete blocks, providing a comprehensive supply solution for all project phases.
Can B&B supply and install, or supply only?
B&B operates both manufacturing and contracting divisions, so we can supply panels only, or discuss a supply-and-install arrangement through our contracting arm. Contact us to discuss the scope that best fits your project and procurement route.
Ready to Specify
Predalle?
Talk to B&B’s team about spans, panel schedules, lead times, and supply options for your next project in Malta. Over 40 years of manufacturing expertise, on your doorstep.