OTRA sprl
Country: Belgium
OTRA sprl (Otra Construction), a Wavre-based eco-construction company founded in 2018 by Laurent Ruidant, specializes in natural and bio-based building systems. They are experts in hemp-lime (chaux‑chanvre) solutions for insulation, wall systems, timber-framing, straw-bale, clay, cork, and lime finishes. Their services include consulting, installation, R&D, natural material product testing, and bespoke eco-renovations across heritage, residential, collective, industrial, and commercial sectors. OTRA is active in circular material advocacy, a member of the Walloon Isolation Platform, and has installed thousands of m² of hemp systems through initiatives like Hempro and Isohemp blocks.
Phone: 32 10 37 14 30
Key Contact: Laurent Ruidant
Email: Click to email
Street Address: Ven. Notre Dame des Champs 1b
City: Wavre
State/Region: Région wallonne
Postal Code: 1300
Country: Belgium
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