Hi Divya,
If you are in Europe, I would recommend checking out EcoCocon (https://ecococon.eu/). Their panels are carbon positive, storing 88,7 kg/m2 (A1-A3). They’ve had Cradle to Cradle and Passivhaus certificates since 2016. There are lots of useful documents for AEC professionals available on their site, too. They have a document for low-rise buildings showing at least 5 floors (https://ecococon.eu/assets/legal/08-low-rise-buildings-(en).pdf). Might be worth contacting them.
There are also some good recommendations over at this post: Bio-based carbon Structural Insulated Panels (SIPs)
I’m not sure if there are any other prefab panel companies listed, but here are a couple sites to check:
- Cradle to Cradle registry: https://www.c2ccertified.org/products/registry Filter by -->Building Supplies & Materials --> Building Exteriors
- Healthy Materials Lab: https://healthymaterialslab.org/material-collections
Happy hunting!