After pouring concrete, what material should be used to fill the gap left by the forms?
I am pouring a 10 ft x 10 ft concrete slab that is grade level with the surrounding grass. I am using well anchored pine 2×4s as the forms. After the slab sets up and the forms are removed, is it better to fill the gap with top soil or should I fill it with something porous like pea gravel. I live in a cold climate that ‘enjoys’ winter ice and snow for several months of the year.
Which is best for the life of the slab?
This question is in the General Section. Responses must be helpful and on-topic.