What to Check When Ordering Delivered Concrete for Domestic Foundations and Slabs
Getting the Strength Right for Your Project When you order delivered concrete for a domestic job such as a foundation, a garage base or a garden slab, the single most important decision is the strength grade. Strength is measured in megapascals (MPa) and is usually written as C10, C20, C30 or C40. Each number tells you the compressive strength the concrete will reach after 28 days of proper curing. Choose a grade that is too low and the concrete may crack under load. Choos