System Assembly

One Wall System.
Multiple Functions.
Built as One Assembly.

Elite Blocc brings structure, insulation, fire performance, acoustic mass and construction efficiency into one coordinated wall system — reducing the number of separate layers, trades and interfaces normally required on site.

Instead of building a wall in disconnected stages, the system uses wood-cement permanent formwork, integrated insulation and a reinforced concrete core to create a robust structural envelope ready for direct finishing.

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HDIII 44/20 — WALL CROSS-SECTION
Wood-cement (WC) · 45 mm each
EPS insulation · 200 mm
RC core · 150 mm
Hover a zone to explore
HDIII 44/20 — 440 mm wall system
The EPS insulation (200 mm) is the dominant zone, positioned on the cold exterior side of the RC structural core. WC shells (45 mm each) form the inner and outer faces.
The Principle

The Wall Is Not Assembled From Risk.
It Is Engineered as a System.

Traditional external walls often rely on multiple independent components — structural blockwork, insulation, cavity detailing, wall ties, membranes, battens, boards, fire-stopping and finish layers. Each interface is another point where quality, sequencing or workmanship can affect final performance.

The Elite Blocc system takes a different approach. Structure, insulation and permanent formwork are coordinated within one assembly, reducing the number of separate operations and producing a more predictable performance outcome. The 200 mm EPS insulation is factory-integrated on the cold exterior side of the RC core — the thermally correct position — and requires no separate site installation.

The result is a construction method designed to reduce envelope complexity while improving confidence in the completed wall system.

Integrated structural concrete core
200 mm EPS on the cold side — factory-integrated, not site-applied
Permanent wood-cement formwork on both faces
Direct internal and external finishing potential
Reduced dependency on multiple trades and sequencing stages
Technical documentation available to support specification
Wall Build-Up

From External Finish to Internal Surface

The HDIII 44/20 wall assembly has four structural zones plus applied finishes. Each zone has a distinct role. The performance comes from how they work together as one engineered system.

LAYER 01 / 06
External Render / Protective Finish

Applied to the outer face of the WC shell. Provides the weather-facing architectural surface and protects the assembly from environmental exposure. Render type, thickness and primer requirements are project-specific.

Weather-facing finish
Not part of the 440 mm structural block depth
Construction Sequence

A Clearer Route From Foundation to Finished Wall

The system is designed to simplify the wall build process. Fewer separate layers means fewer separate operations and a more direct route to structural enclosure.

Set Out and Prepare the Base
Set the wall line from structural drawings. Lay the first course on two mortar beds positioned only under the block walls — a full-width mortar bed is avoided because mortar has lower compression resistance than concrete. Accuracy at this stage governs the quality of the entire assembly.
Dry-Stack the Blocks
Subsequent courses are dry-laid, starting from corner or UNI blocks. Stagger courses by half a block. Keep blocks tightly closed — Isotex does not recommend insulating foam for compensating gaps, as this can create thermal or acoustic bridges.
Place Reinforcement
Horizontal bars rest in the block lunettes with spacers at every course. Vertical bars are positioned centrally within the cavity. Reinforcement laps must be at least 50% greater than required by applicable standards. Reinforcement specification must always follow the project engineer's structural design.
Pour the Concrete Core
After approximately 6 courses (1500 mm), fill the cavities with concrete. Minimum consistency class S4; aggregate below 16 mm. Start from perimeter walls approximately 1000 mm from corners and shoulders to reduce localised pressure. Vibrate with a small poker to ensure complete fill.
Apply Finishes
Apply plaster only to dry surfaces. Avoid frozen walls, wet surfaces or walls with unset concrete. The wood-cement face is the direct substrate — no additional boarding is typically required before plastering. For build-up exceeding 20 mm use two coats separated by at least 28 days.
Traditional Approach

Traditional
Wall Approach

Structural blockwork as a separate element
Insulation installed separately — risk of gaps
Multiple cavity and interface details to manage
Fire-stopping specified and installed separately
Multiple trades and sequencing dependencies
Performance sensitive to workmanship at each interface
Envelope performance reliant on site variation control
Elite Blocc Approach

Coordinated
System Assembly

Structure and insulation coordinated in one manufactured block
EPS integrated on the cold side — no site installation risk
Permanent WC formwork replaces separate shuttering
Reduced number of separate build stages on site
Clearer installation logic from first course to pour
Performance route easier to verify and inspect
Technical documentation supports specification
Performance Logic

Performance Comes From the Assembly.

The system's value comes from the relationship between mass, insulation position, structural continuity and certified documentation. Values below are specific to HDIII 44/20 and sourced from supplied Isotex technical data sheets.

Structural Strength

The 150 mm reinforced concrete core provides the primary structural capacity. Wall geometry, reinforcement schedule and concrete grade must be confirmed by the project engineer to the applicable structural standard for the project location.

Thermal Performance

200 mm of Neopor® BMBcert EPS is positioned on the cold exterior side of the RC core — the thermally correct location for an external wall. No separately installed insulation layer is required. Published 2D U-value: 0.13 W/m²K for HDIII 44/20.

Fire Performance

Fire resistance must be assessed by product type, wall build-up and certification scope. REI 120 is the verified rating for the HDIII wall system per supplied Isotex fire certification. Do not apply floor fire ratings to wall assemblies.

Acoustic Comfort

The combination of wall mass, concrete core and wood-cement faces contributes to sound insulation. Published single-partition acoustic value for HDIII 44/20: 53 dB Rw. Double-partition values are listed separately — do not conflate the two figures.

Durability

The wood-cement shells become a permanent part of the finished wall — there is no shuttering to strip. The WC and concrete core create a robust, long-term wall assembly suited to exposed and demanding climatic conditions.

Programme Efficiency

By combining structural, insulation and formwork functions into one block, the system reduces the number of discrete operations required to reach a complete, insulated, structurally resolved wall ready for finishing.

Applications

Designed for Projects Where Certainty Matters

Elite Blocc suits projects where wall performance, build predictability and long-term durability are central to the design brief. The system is used across residential, hospitality, commercial and development sectors in the Dominican Republic, the Caribbean and the UK.

Private Homes and Villas

Thermal comfort, acoustic mass and a high-quality building envelope — particularly suited to warm-climate residential construction in the Caribbean and Dominican Republic.

Residential Developments

A repeatable wall system with documented performance and clearer specification control across multiple units or phases.

Hotels and Hospitality

Speed to enclosure, acoustic separation between spaces, thermal performance and robust construction suited to heavy use.

Commercial Buildings

Offices, mixed-use and commercial structures requiring a high-performance, specification-backed external wall strategy.

Coastal and Exposed Locations

The concrete core and wood-cement faces provide resilience in exposed environments where durability and specification control are priorities.

Caribbean and Warm Climate

Thermal performance, structural design appropriate to the regional climate, and efficient delivery supported by Elite Blocc's Santo Domingo base.

Specification Note

Every Project Still Requires Correct Design and Engineering.

Elite Blocc provides a high-performance wall system with published technical documentation. Final specification must always be reviewed against the selected product, project location, structural design, fire strategy, acoustic requirements, thermal targets and applicable local building regulations.

For projects in seismic, hurricane-prone, coastal or high-exposure environments, the wall assembly and structural design must be confirmed by the project engineer and relevant design team before construction commences.

Technical note: Published performance values are specific to HDIII 44/20 and sourced from supplied Isotex technical documentation. Values vary between products — always refer to the correct product datasheet for the selected configuration. Final product selection, structural design, fire strategy, acoustic design, thermal modelling and compliance checks must be confirmed by the appointed project professionals and relevant authorities.

Frequently Asked

System Assembly FAQs

The HDIII 44/20 has four structural zones: WC outer shell (45 mm) · EPS insulation (200 mm) · RC structural core (150 mm) · WC inner shell (45 mm) = 440 mm total. The EPS insulation is the dominant zone at 45.5% of total wall depth, positioned on the cold exterior side of the concrete core. Source: Isotex technical data sheet PDF-HDIII-44-20.
No. In the HDIII system the EPS insulation sits as one zone between the outer WC shell and the RC structural core. The inner WC shell sits directly against the concrete. This positions all 200 mm of insulation on the cold exterior side — the thermally correct placement for an external wall system.
No. The value is in the full wall assembly. The system combines permanent wood-cement formwork, factory-integrated EPS insulation and a reinforced concrete core into one coordinated build method. The block is the starting point of the system, not the system itself.
The reinforced concrete core, poured in situ through the block cavities. Concrete consistency class should be not less than S4 with aggregate below 16 mm. Reinforcement design and concrete specification must always follow the project engineer's structural calculation and the applicable structural standards for the project location.
Yes. The wood-cement faces on both sides are designed to receive plaster, render or dry-lining directly. Apply only to dry surfaces; avoid frozen conditions or unset concrete. For plaster build-up exceeding 20 mm, use two coats separated by at least 28 days to prevent cracking or crazing.
Technical datasheets, CE and ETA certification, BBA assessments, EPD documents and fire certification are available through the Elite Blocc Technical Hub and Download Centre. For project-specific technical support, contact the Elite Blocc team directly — a technical team, not a brochure, is behind every recommendation.
Next Steps

Ready to Review the System for Your Project?

Review the correct product family, wall build-up and technical documentation for your project requirements. Elite Blocc can advise on wall strategy and specification where project drawings are available.

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For projects with drawings available, Elite Blocc can review the wall strategy and advise on the appropriate product, reinforcement approach and technical documentation package.

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