Round Top Openings with the Fox Buck: A How To
Fox Block’s Glen Klassen shows you how to get it done for three different radiuses.

ICFs Make Home Ownership Attainable for Young Adults and Seniors
How do you control voids in the wall?
The concrete mix is a high slump 5″- 6.5″ (125 mm – 165 mm) with a smaller aggregate size so the concrete flows easily. The person in charge of placing the concrete should watch the concrete flow throughout the whole wall to ensure there are no void pockets. Internal vibrating provides good consolidation, eliminating voids.