Standard Carport Style Online Estimator! Get an online quote instantly! 12 Gauge products have a 20 year limited warranty on roofing materials. 14 Gauge Standard Carports Select your length12 ft18 ft20 ft22 ft24 ft12 ft[cost_calculator id=”14-gauge-standard”]18 ft20 ft22 ft24 ft 12 Gauge Standard Carports Select your length12 ft18 ft20 ft22 ft24 ft12 ft18 ft20 ft22 ft24 ft