A roll type storm shutter including a plurality of elongated horizontally extending preferably corrugated shutter slats held together in an edge-to-edge arrangement. Each of the storm slats has complimentary first and second edges configured to slidably and interlockingly engage with a next adjacent slat for limited pivotal movement therebetween to facilitate rolled vertical deployment and retraction of the storm shutter. A central portion between the edges of each slat preferably has lengthwise extending corrugations for greater impact resistance to better withstand the impact of airborne flying objects produced during storms and hurricanes. Elongated solid panels may be provided each having enlarged parallel edge portions configured and spaced apart for dependent lengthwise slidable engagement between either inwardly or outwardly positioned grooves formed proximate to the edges of each of the slats. Each of said panels is coextensive with and preferably contacting inwardly or outwardly facing corrugation peaks, respectively, to further enhance the impact resistance of the storm shutter.