Kalona Builders Supply Co. Headquarters for the Builder & Handyman Open 7-5 weekly - 'til 12 on Sat. Building Supplies Is Our Business 108 5th St. Kalona 319-656-2283 Kalona Builders Supply Co. Headquarters for the Builder & Handyman Open 7-5 weekly - 'til 12 on Sat. Building Supplies Is Our Business 108 5th St. Kalona 319-656-2283