To hire a reliable commercial glass & curtain wall installation contractor in Arlington: (1) Get 3 written quotes with line-item breakdowns, (2) Verify VA license at Virginia Department of Professional Regulation (dpor.virginia.gov), (3) Confirm active general liability and workers' comp insurance, (4) Check Google and BBB reviews specific to Arlington projects, (5) Never pay more than 10-30% upfront — never pay in full before completion.
Full Explanation
Red flags specific to Arlington contractors: no physical Arlington-area address, pressure to start immediately, cash-only payment demands, and license numbers that don't verify at Virginia Department of Professional Regulation (dpor.virginia.gov). Seasonal demand during summer brings out less reputable contractors.