Energy-Saving Review WEB Service Starts Providing Product Information for DuPont Styro's 'Styrofoam™' Series Insulation Materials; Supports Building Envelope Performance Review Based on Actual Product Data

one building Co., Ltd. (Meguro-ku, Tokyo, hereinafter 'one building') has announced the commencement of providing product information for DuPont Styro Co., Ltd.'s (Head Office: Chiyoda-ku, Tokyo, hereinafter 'DuPont Styro') extruded polystyrene foam insulation material 'Styrofoam™' series on its free 'Energy-Saving Review WEB Service' for non-residential buildings.

This will allow for easy calculation of building envelope performance using 'Styrofoam™' from the initial design stage, directly on a web browser. This initiative has been realized through data collaboration with insulation material information provided by Takashima Co., Ltd. (Chiyoda-ku, Tokyo, hereinafter 'Takashima'), a trading company that handles a wide range of building and industrial materials.

About the Energy-Saving Review WEB Service In recent years, energy-saving standards for buildings have been gradually strengthened, with reinforced energy-saving regulations for medium-sized non-residential buildings also coming into effect from April 2026. Against this background, the importance of considering specifications while confirming the building's energy-saving performance from the design stage has been increasing.

The Energy-Saving Review WEB Service is a design support service that allows users to check the building envelope performance (BPIm) and primary energy consumption (BEIm) of non-residential buildings on a web browser, while integrating building material selection and energy-saving calculations.

By inputting building specifications at the design stage, it is possible to perform energy-saving compliance judgments and performance confirmations with ZEB standards in mind, and it also supports reviews using actual product data from building material manufacturers.

Design Review Made Possible with Styrofoam™ × 'Energy-Saving Review WEB' ### 【Expected Effects in Design Practice】 - Review of building envelope performance based on actual product data Specifications such as Styrofoam™ product name, thickness, and thermal conductivity can be directly called up from the selection screen, eliminating the need for tedious manual input and enabling efficient building envelope performance calculations. - Efficiency in comparing insulation specifications By comparing multiple insulation material specifications and confirming building envelope performance, it is possible to smoothly review insulation specifications according to project conditions. - Rational insulation planning at the design stage By reviewing insulation material specifications while checking the results of building envelope performance calculations, it is possible to proceed with rational building envelope planning that incorporates insulation performance at the design stage. - Increased persuasiveness of proposals with actual product data Presenting calculation results based on actual product specifications leads to clarifying the design basis and improving the reliability of proposals when explaining energy-saving performance to clients.

About Styrofoam™ Styrofoam™ is an extruded polystyrene foam insulation material (XPS) provided by DuPont Styro K.K., widely adopted as a building insulation material with high thermal insulation performance and durability.

It conforms to JIS A 9521 'Building Insulation Materials' and possesses thermal insulation performance with a thermal conductivity of 0.036 to 0.022 W/(m・K) depending on the product grade.

Due to the uniform closed-cell structure characteristic of extruded polystyrene foam, it has low water absorption and can maintain stable thermal insulation performance over a long period, making it widely used in various building applications for both residential and non-residential buildings.

### 【About DuPont Styro K.K.】 DuPont Styro K.K. is an insulation material manufacturer that manufactures and sells extruded polystyrene foam insulation material 'Styrofoam™' in Japan, backed by the technology of DuPont, a global chemical manufacturer.

The company has contributed to improving the thermal insulation performance in Japanese residential and non-residential buildings through long-standing technological development and stable product supply of extruded polystyrene foam insulation materials.

Even as high thermal insulation performance is required for Styrofoam™ as a target product of the Building Materials Top Runner Program, it is widely adopted in the construction field due to its stable performance and quality.

Currently, it is used in various building applications such as residences, public facilities, and commercial facilities as an insulation material that contributes to improving energy-saving performance and extending the lifespan of buildings.

### 【Free Public Webinar】Design Strategy to Win '2026 Energy Efficiency Standard Reinforcement' A free seminar will be held on **Thursday, April 23, 2026, from 16:00-17:00** to introduce the benefits and features of this service using actual operation screens.

▼ For details on the Energy-Saving Review WEB Service introduction seminar, click here: https://bimsustainaforenergy.jp/seminar/seminar260423

Company Information ### 【DuPont Styro K.K.】 An insulation material manufacturer that produces and sells extruded polystyrene foam insulation material 'Styrofoam™'. For many years, through technological development and stable product supply of insulation materials, it has contributed to improving the thermal insulation performance of residential and non-residential buildings in Japan. It provides insulation solutions that contribute to improving the energy-saving performance and durability of buildings, supporting the realization of sustainable building environments. URL: https://www.dupontstyro.co.jp

### 【Takashima Co., Ltd.】 A 'functional trading company' that develops building materials, industrial materials, and electronics/devices based on a multifaceted network and proposal capabilities cultivated over 110 years of history. In the building materials field, it focuses on providing design support and labor-saving solutions in anticipation of the mandatory compliance with energy-saving standards. Under the corporate mission of 'contributing to society through business,' it aims to contribute to the realization of a sustainable carbon-neutral society. URL: https://www.tak.co.jp/

### 【one building Co., Ltd.】 A Climate Tech company that designs the future of architecture with technology. It aims to integrate and utilize building information with digital technology to build a sustainable society. It promotes the standardization of sustainable architecture that optimizes building performance and extends building lifespan, leading the next generation of architecture. URL: https://one-building.co.jp