Residential and commercial dust signs are required by the Clark County Air Quality Board. If not in compliance, your construction job site can be fined and shut down. More information can be found at https://www.clarkcountynv.gov/government/departments/environment_and_sustainability/division_of_air_quality/permitting/applications_forms/dust_permitting_forms.php.
Residential and commercial dust signs are not as expensive as you may think. A 4ft x 4ft aluminum dust sign is under one hundred dollars and a 4ft x 8ft dust sign is only $175.00. The Air Quality people require a 4ft x 4ft dust sign for projects 10 acres or less and a 4ft x 8ft dust sign for projects larger than 10 acres. Certain information needs to be on the sign and text has to be certain sizes in order to be in compliance. The Air Quality people want contact information on the dust sign so that violators can be reported to a responsible party. We all breathe the air and the good people at Clark County Air Quality want to see that everybody breathes healthy air.
Residential and commercial dust signs are made with an aluminum panel to prevent rust and last a long time. While a residential construction project may only take a few months, large home developments might take years to build. The construction companies like the aluminum signs because every so often they get damaged by a water truck or other heavy equipment and the dust permit sign can be straightened out and put back up. Dust signs made with wood board will break into pieces and are subject to weathering.