Choosing the Right Concrete Grade for a Garden Foundation

https://pouringpoint.brightsora.com/posts/choosing-the-right-concrete-grade-for-a-garden-foundation

Choosing the right concrete grade for a garden foundation isn’t just about strength—it’s about matching the mix to your specific soil and weather conditions. For most small sheds or greenhouses, a standard C20 mix works fine, but if you're in a rainy area or building on clay, upgrading to C25 with added waterproofing can prevent cracking. I've seen folks regret using a cheap mix that crumbles after one freeze-thaw cycle, so taking time to figure out the right grade now saves headaches later.