You’ll need to ensure you have a sturdy and level base prepared for your log cabin. It is essential that the base is sufficient to support the weight of the building (and the contents!), as well as level to ensure the cabin doesn’t twist and gaps do not appear.
We have a helpful guide on how to build a variety of shed and log cabin bases on our website to help you figure out the best option for you: https://www.powersheds.com/how-to-build-a-shed-base/
The minimum recommended base size can be found on the product specifications section of each product page.