Cross Laminated Timber
We manufacture our CLT panels using lamina (sawn boards) made from Japanese cedar (Sugi). The panels are produced with isocyanate-based or resorcinol adhesives and meet JAS standards for F☆☆☆☆ (F four-star) classification, ensuring low formaldehyde emissions. Our product dimensions range from 36mm to 450mm in thickness, up to 1,200mm in width, and up to 8,350mm in length. These panels provide excellent strength, thermal and sound insulation, and fire resistance, making them suitable for a wide range of applications in both residential and commercial buildings, including interior finishes and structural components.
Seihoku Plywood Co., Ltd
29 Jul 2026
Construction product
HUB-7074
Japan
28 Jul 2031
Product sector |
Construction product |
EPD category |
Third party verified EPD (5 years) |
Averaging type |
No averaging |
Scope |
Cradle to gate with modules C1-C4 and D |
Reference standard |
EN 15804:2012+A2:2019/AC:2021 |
PCR |
EPD Hub Core PCR 1.2 |
cPCR |
EN 16485 Round and sawn timber |
Manufacturer information
Name |
Seihoku Plywood Co., Ltd |
Address |
1-25-5 Hongo, Bunkyo-ku, Tokyo, Japan |
| quality@seihoku-group.co.jp | |
Website |
https://www.seihoku.gr.jp |
Verification details
EPD author |
Ryuuichi Okada |
Verifier |
Afzal khan Peerukhan |
Declaration status |
Verified |
Environmental impacts
Declared unit |
1m³ of Cross Laminated Timber |
Mass per unit |
420.0 kg |
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