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Composite Global’s rigid insulation products are marketed for car-park soffits, but the available evidence does not prove that the board named in the headline made a particular car park compliant. Composite Global identifies a Mammoth Car Park Panel Insulation System for under-soffit areas, while a separate product announcement describes Durasheath-3 as a PIR board with a reinforced, paintable grey surface. Neither source identifies the exact project assembly, jurisdiction, fire classification or approval behind the headline.
That distinction matters. A car park is compliant only when the specified board, fixings, coatings, concrete substrate, exposure conditions and installation method satisfy the applicable building and fire requirements. The product’s intended use alone is not a compliance certificate.
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What does the evidence actually establish?
Composite Global’s own supplier information says that CGS Insulation is the Australian supplier of the Mammoth Car Park Panel Insulation System, designed especially for under-soffit areas. This is evidence of a car-park application, not evidence that every Composite Global board is approved for every car-park construction.
A separate Composite Global product announcement describes Durasheath-3 as a rigid PIR foam board with a reinforced matte-grey surface that can be painted. The announcement positions it for the car-park insulation sector, but it does not establish that Durasheath-3 is the same product as the Mammoth system or the board installed in the project referenced by the headline.
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The exact Architecture & Design article and project documentation were not available in the supplied evidence. Consequently, the project location, construction date, code pathway, board thickness, thermal calculation, fire classification, fixing schedule and inspection outcome remain unverified. Any statement that the named board itself is “compliant” should be treated as an attributed project claim until those documents are available.
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1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsWhy are car-park soffits a specialised insulation problem?
A soffit is the underside of a concrete floor or slab. In a car park, it may be exposed to vehicle exhaust, impact, water, salts, temperature changes and the fire-performance requirements of the occupied building above. Insulation must therefore do more than provide a low thermal conductivity: the complete lining must remain secure, resist the expected environment and meet the relevant fire and surface-finish requirements.
Soffit work also differs from insulation installed on a car-park deck. A deck board may be loaded by vehicles, paving, screeds or landscaping. A soffit board is suspended beneath a slab and is primarily governed by fixing, adhesion, impact resistance, fire exposure, moisture and overhead installation constraints. Data for one application should not be transferred to the other.
What is the difference between a soffit system and a car-park deck system?
Soffit and deck insulation use different design assumptions. A soffit system is fixed to the underside of a slab, while deck insulation is placed above or within a traffic-bearing build-up. The same foam family can appear in both markets, but the products, facings, load ratings and approvals are not interchangeable.
| Design question | Under-slab soffit | Car-park deck |
|---|---|---|
| Primary load | Self-weight, fixing loads, impact and fire exposure below the slab | Vehicle, pavement, screed, waterproofing and imposed dead loads |
| Critical installation issue | Anchors, washers, joints, substrate condition and overhead work | Compression, continuity, drainage, waterproofing and load distribution |
| Typical evidence needed | Fire classification for the installed lining, fixing design, thermal data and finish compatibility | Compressive stress, dimensional stability, moisture performance, thermal data and deck-system approval |
| Can data be substituted? | No. A deck approval does not automatically approve a soffit lining, and vice versa. | |
The comparison is reflected in the available manufacturer literature. Promat’s guidance discusses a non-combustible facing board bonded to stone wool for installation beneath concrete floors. Cellecta’s HEXATHERM XCPL information describes a faced XPS composite thermal board for car-park soffit lining. By contrast, the Kingspan GreenGuard car-park brochure covers XPS products and design considerations for car-park decks. These are examples of different systems, not alternative approvals for Composite Global’s board.
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What does “compliant” need to mean on a real project?
Compliance is a project-level conclusion, not a marketing adjective. The designer or building-control authority must identify the governing jurisdiction and requirements, then demonstrate that the installed assembly satisfies them. Depending on the location and building type, the evidence may cover thermal transmittance, condensation risk, reaction to fire, fire resistance of the floor, smoke development, surface spread, structural fixing, durability, accessibility and energy-code provisions.
At minimum, the compliance file should identify:
- Jurisdiction and edition of the code: Australian, UK, European or another code regime can impose different classifications, test methods and documentation.
- Exact product: manufacturer, product name, thickness, density, facing, batch or revision and any factory-applied finish.
- Complete assembly: concrete type and thickness, board orientation, joints, membranes, coating, sealants, anchors, washers and penetrations.
- Fire evidence: the classification or test report for the installed configuration, not merely a generic statement that PIR or XPS is fire resistant.
- Thermal calculation: the declared conductivity, thermal bridges, slab build-up and target U-value for the actual project.
- Exposure and durability: water, condensation, chlorides, exhaust contaminants, cleaning chemicals, impact and expected service life.
- Installation records: substrate preparation, fixing pattern, inspection, repair of damaged boards and treatment of edges or openings.
A supplier’s intended-use description can help a specifier shortlist a system, but it cannot replace these documents.
What thermal performance can reasonably be claimed?
The available data contains one clearly stated numerical result: Promat says its own TLFR Board system can achieve a U-value of 0.20 W/m²K using the standard product and stainless-steel fixings. That figure belongs to Promat’s stated board-and-fixing configuration. It is not a performance value for Composite Global, Mammoth or Durasheath-3 and should not be presented as one.
For a Composite Global specification, request the current declared thermal conductivity and calculate the U-value for the complete floor or soffit build-up. A board’s nominal conductivity is not the same as the finished assembly’s U-value: concrete, air films, fixings, joints, thermal bridges and any suspended ceiling or coating can change the result. Thickness should be selected from the project calculation rather than copied from another manufacturer’s example.
Where a project requires condensation control, the designer should also check surface temperature and vapour movement at slab junctions, penetrations and board joints. A thermally adequate board can still produce a defect if gaps, wet substrates or unsealed interfaces create cold bridges.
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How should fire performance be verified?
Start with the fire requirement for the floor and the visible soffit lining. “PIR,” “XPS,” “non-combustible facing” and “fire-rated” describe materials or features, but they do not by themselves prove a classification for a particular assembly. The relevant test or assessment must cover the product thickness, facing, adhesive or mechanical fixings, joints, coatings and orientation used on site.
Ask the supplier for the current fire classification report, field-of-application rules and installation limitations. Confirm whether the report addresses reaction to fire, fire resistance, smoke or flame spread, and whether it is valid in the project’s jurisdiction. If a paint or protective coating is applied, obtain written confirmation that the coating is included in the tested or assessed build-up. A paintable surface is a practical feature; it is not automatically a fire approval.
Promat’s stone-wool-and-facing-board approach illustrates why assembly evidence matters: the fire and thermal outcomes arise from the combined board, insulation, fixings and concrete-floor arrangement. That evidence cannot be transferred to a PIR or XPS board simply because the products are used in the same type of car park.
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Use the following sequence before a purchase order or substitution is approved:
- Define the location. Mark whether the insulation is under a slab, on a deck, at a ramp, in a plant area or at an exposed perimeter. Record whether vehicles, water or impact can reach it.
- Identify the governing requirements. Obtain the project’s energy, fire, structural, condensation and durability clauses, including the code edition and authority having jurisdiction.
- Obtain the current technical sheet. Confirm product name, thicknesses, conductivity, density, dimensional tolerances, moisture limits, facing and finish options. Do not rely on an old announcement or an undated web page.
- Match the assembly. Have the designer confirm concrete substrate, adhesives, anchors, washers, joint treatment, penetrations, membranes and coatings against the supplier’s installation instructions.
- Check fire documentation. Request reports or classifications for the exact thickness and facing, and verify that any paint or protective layer is permitted.
- Check fixing and impact resistance. Determine pull-out capacity, edge distances, anchor spacing, board weight, overhead access and protection from vehicles or maintenance equipment.
- Check moisture and chemicals. Confirm compatibility with condensation, wash-down water, de-icing salts, oils, exhaust residue and cleaning products expected at the site.
- Record approval. Keep the signed design review, product revision, delivery batch, installer records, photographs of concealed work and inspection sign-off.
This process protects the project from a common substitution error: replacing a specified soffit system with a board that has a similar name or thermal value but lacks the required fire, fixing or exposure evidence.
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Can a paintable rigid board be finished like an interior wall?
Durasheath-3 is described as having a reinforced matte-grey, paintable surface. That can simplify visual finishing where the manufacturer permits it, but painting should remain part of the specified system. Confirm the approved primer, topcoat, surface preparation, drying conditions, maintenance interval and compatibility with fire and moisture requirements before work begins.
Do not conceal joints, anchors or damaged edges under decorative paint without inspection. A coating may improve appearance and help protect a facing, yet it will not compensate for loose fixings, open joints, water ingress or an unsupported board. In a car park, the finish also needs to tolerate abrasion, dirt, exhaust deposits and periodic cleaning.
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How do the available alternative systems compare?
The available sources show why alternatives must be compared by system rather than by brand name or foam type.
| Comparison axis | Questions to ask |
|---|---|
| Application | Is the product assessed for an underside slab, a deck, a ramp or another location? |
| Thermal performance | What declared conductivity and thickness achieve the project’s calculated target? |
| Compressive performance | What compressive stress or load rating applies, and is it relevant to the actual support condition? |
| Fire classification | Which test standard, thickness, facing and assembly are covered? |
| Facing and finish | Is the surface non-combustible, reinforced, paintable, moisture-resistant or protected by another layer? |
| Fixing and system details | Are anchors, washers, adhesives, joint treatments and substrate limits specified? |
| Moisture exposure | Can the board tolerate condensation, wash-down, salts and accidental wetting? |
| Jurisdiction | Are the certificates and assessments recognised by the local authority? |
Promat’s published U-value example, Cellecta’s faced XPS soffit information and Kingspan’s GreenGuard deck literature each answer only part of this checklist. They should be used to frame questions, not to fill gaps in Composite Global’s project evidence.
What are the most common compliance mistakes?
- Assuming intended use equals approval. A page saying “for car parks” does not prove compliance with a fire or energy code.
- Mixing soffit and deck data. Deck compressive ratings and waterproofing details do not validate an overhead lining.
- Quoting another system’s U-value. The Promat 0.20 W/m²K figure is not transferable to Composite Global.
- Ignoring the finish. Paint, render, membranes and adhesives can alter fire or moisture performance.
- Using outdated documents. Product names, thickness ranges, classifications and installation instructions can change.
- Leaving fixings to the installer. Anchor type, spacing, edge distance and pull-out capacity are part of the assembly design.
- Overlooking service penetrations. Pipes, lights, signs and drainage points can create thermal bridges or openings that need approved detailing.
- Calling a project compliant without authority evidence. Final acceptance may depend on a building surveyor, fire engineer, certifier or other designated authority.
What should a building owner request after installation?
Ask for an as-built insulation schedule listing each area, product and thickness, together with delivery records and the current technical documents. Request photographs before concealment, fixing and penetration details, coating records and any non-conformance reports. The handover file should also identify who reviewed the thermal and fire evidence and which authority accepted the work.
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During operation, inspect for impact damage, detached boards, corroded fixings, water staining and failed joints. Repairs should use the same approved system or a documented replacement detail. A visually tidy ceiling is not proof that the concealed assembly still meets its original assumptions.
Is the headline’s compliance claim verified?
Not from the available evidence. Composite Global is demonstrably linked to insulation products marketed for car-park soffits, and Durasheath-3 is separately described as a PIR board with a paintable reinforced surface. However, the exact product, project jurisdiction, installed assembly and approval documents behind the headline have not been established.
The defensible conclusion is narrower: Composite Global may have supplied a rigid insulation solution intended for a car-park application, while compliance depends on the complete, documented system and the authority’s requirements. Anyone specifying or approving the work should obtain current product, fire, thermal, fixing and installation evidence for the exact assembly before using an unqualified compliance statement.
Frequently Asked Questions
Is Durasheath-3 the same product as the Mammoth Car Park Panel Insulation System?
The supplied sources do not establish that they are the same product. Mammoth is identified as a car-park under-soffit system, while Durasheath-3 is described separately as a PIR board with a reinforced paintable surface; the relationship requires confirmation from current Composite Global documentation.
Can the Promat 0.20 W/m²K figure be used for a Composite Global board?
No. The 0.20 W/m²K value is stated for Promat’s own TLFR Board arrangement with standard product and stainless-steel fixings. A Composite Global design needs its own conductivity data and a project-specific U-value calculation.
What documents prove a car-park insulation system is fire compliant?
Request a current classification, test report or engineering assessment covering the exact board thickness, facing, fixings, joints, coatings and substrate. Confirm that the document is recognised in the project’s jurisdiction and addresses the particular fire property required by the building code.
Does painting an insulation board affect its approval?
It can. Primer, paint or protective coatings may change reaction-to-fire, smoke, moisture or adhesion performance, so use only coatings listed in the manufacturer’s approved build-up and retain the application and inspection records.
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