Every construction material has an environmental impact. The important question is not whether a product is completely impact-free, but how its environmental characteristics relate to its performance, durability and function within the building.
TRIOTHERM+ is a high-density EPS structural insulation system designed to support windows and doors while reducing thermal bridging at critical junctions.
Its environmental performance can be assessed using independently verified product data, alongside its practical contribution to the building's long-term performance.
Environmental Performance Starts with the Complete Application
An insulated door upstand must provide reliable structural support, maintain dimensional stability, resist moisture and help preserve the thermal continuity of the building envelope.
Assessing a construction material solely by its environmental impact per kilogram or cubic metre does not provide the complete picture.
The quantity of material required, its structural performance, expected service life and function within the completed building are also relevant.
This is particularly important at door thresholds, where the choice of structural support can have a significant influence on thermal bridging.
TRIOTHERM+ Compared with Conventional Concrete Upstands
Concrete is a familiar and structurally reliable material for supporting door thresholds. However, its relatively high thermal conductivity can create a significant thermal bridge where a concrete upstand interrupts the building's insulation layer.
TRIOTHERM+ offers a different approach by combining structural load-bearing capacity with thermal insulation in a single component.
With a nominal thermal conductivity of λ10 = 0.0374 W/(m·K), TRIOTHERM+ transfers substantially less heat through the material than conventional concrete.
This can provide several important benefits:
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Reduced thermal bridging: Helps maintain insulation continuity beneath entrance doors, sliding doors and floor-to-ceiling glazing.
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Improved internal surface temperatures: A properly designed insulated threshold junction can reduce cold surfaces and associated condensation risks.
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Long-term energy efficiency: Reducing heat losses at critical junctions can contribute to lower heating demand throughout the building's service life.
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Simplified construction: Structural support and thermal insulation are combined in a purpose-designed component, potentially reducing the need for additional thermal-break arrangements.
These benefits are particularly relevant where the door threshold forms a connection between the internal floor and external construction.
However, the resulting thermal performance depends on the complete junction, including its geometry, surrounding materials and insulation continuity. The material's thermal conductivity alone does not determine the final Ψ-value.
From an environmental perspective, both the embodied impacts of the materials and their contribution to the building's operational energy performance should be considered.
The key advantage of TRIOTHERM+ is not simply replacing concrete. It is providing the required structural support while helping preserve the thermal integrity of the building envelope.
Independently Verified Environmental Product Declaration
TRIOTHERM+ is supported by an independently verified Environmental Product Declaration (EPD).
An EPD provides standardised environmental information based on a Life Cycle Assessment (LCA), allowing architects, specifiers and other building professionals to assess documented environmental impacts.
The declaration reports environmental indicators for defined life-cycle stages, including raw material supply, manufacturing and the applicable end-of-life scenarios.
This transparency is particularly relevant because EPS is a fossil-derived material, and its manufacturing impacts must be considered as part of an environmental assessment.
An EPD does not automatically establish that one product is environmentally superior to another. It provides verified information that can support comparisons where the functional units, assessment methods and system boundaries are compatible.
Material Efficiency, Durability and Moisture Resistance
TRIOTHERM+ is manufactured from high-density expanded polystyrene (EPS), combining load-bearing capacity with thermal insulation.
Its relevant properties include:
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low thermal conductivity;
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high compressive load-bearing capacity;
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dimensional stability;
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very low water absorption;
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resistance to rot and moisture-related deterioration.
These characteristics support the long-term performance of the structural connection beneath doors and windows.
A properly designed and installed upstand should retain its intended function throughout its service life without requiring frequent replacement.
Durability and material efficiency are therefore important considerations when assessing the environmental performance of the complete installation.
Recyclability and End-of-Life Considerations
EPS is a thermoplastic material that can be mechanically recycled where suitable collection, sorting and recycling facilities are available.
The material composition of TRIOTHERM+ supports its technical recyclability.
However, a recyclable material is not necessarily recycled in practice.
Actual recovery depends on the installation method, dismantling possibilities, contamination, adhesives and the availability of appropriate recycling infrastructure.
The TRIOTHERM+ EPD provides further information about the end-of-life scenarios considered in its environmental assessment.
Low-Emission Classification
TRIOTHERM+ holds an EMICODE EC1 Plus classification, indicating very low emissions under the applicable assessment criteria.
This classification complements the product's Environmental Product Declaration, but the two documents serve different purposes.
The EPD reports environmental impacts across defined life-cycle stages, while EMICODE provides information about product emissions.
Together, these documents offer building professionals additional independently assessed information when selecting materials.
The Important Point
Environmental performance should be assessed through reliable information and the actual function of a product within the building.
TRIOTHERM+ combines structural support, thermal insulation, durability and moisture resistance with independently verified environmental documentation.
Its EPD provides transparency about declared life-cycle impacts, while its EMICODE EC1 Plus classification supports the assessment of product emissions.
Compared with a conventional uninsulated concrete upstand, TRIOTHERM+ can help reduce thermal bridging beneath doors and glazing while providing the necessary structural support.
A responsible material choice considers not only what a product is made from, but also how long it performs, what function it fulfils and how it contributes to the performance of the complete building.