Creative Metals standard roof curbs for conventional built up roofing are factory fabricated from fully welded 18 ga. (.050) galvalume steel, have mitered corners, have a standard height of 8”, a full perimeter wood nailer and insulated with 1-1/2” thick 3 lb. density fiberglass insulation to provide a thermal barrier to prevent condensation. Conventional roof curbs are available in 3 basic styles to accommodate most common roofing applications.

MODEL: CST This style curb has a built-in 45 degree “cant” measuring 3” x 3” x 3” around the bottom curb perimeter and a 1” wide bottom flange. This style is ideal for use on non-insulated flat roofs utilizing composite type rolled roofing as the cant allows for an easy transition of the roofing materials up the sides to the wood nailer without breaking or cracking. This style is not recommended for use on pitched or shingled roofing without adding extended bottom flanges.

MODEL:  CSSF This style curb has straight vertical sides and a 2” wide bottom flange making it a great all-purpose roof curb. A “self-flashing” style roof curb is designed for use on insulated or non-insulated rubber roofs but with the addition of fiber cants  (supplied by the roofer) it can be used with composite rolled roofing as well. This style is ideal for use on either flat or pitched roofs but extended bottom flanges are recommended for use on shingled roofs.

MODEL: CSRC This style curb has a built-in 45 degree  “cant” measuring 3” x 3” x 3” and a 1” wide bottom flange but as the name implies the cant is raised up from the bottom perimeter. This style is designed specifically for use on insulated roofs and the “raised” portion of the cant can be made to the same thickness as the roofing insulation with the standard being 1-1/2” inches. This style is not recommended for use on pitched or shingled roofs without adding extended bottom flanges.

From these 3 basic roof curb styles and available optional accessories, it is possible to manufacture roof curbs to fit almost any type of roof application. Please visit our Creative Metals online catalog for additional information and submittal data.