Judges Needed for MCAA Skills Challenge and Fastest Trowel On The Block! Words: Precision masonry Inc.We’re still looking for judges for the MCAA’s Skills Challenge and MCAA’s Fastest Trowel On The Block at the World of Concrete in Las Vegas, NV. The competitions will be held Wednesday, June 9th, 2021 in the Silver Lot of the Las Vegas Convention Center. The MCAA’s Skills Challenge starting at 8 AM and Fastest Trowel On The Block Competition will start at 9:15 AM. To sign up to be a judge download the judging form and email it to Jen Verdonck at jverdonck@masoncontractors.org.