Why settle for a substitute. This is the original, patented roof curb that assembles in less than 5 minutes without the use of tools. Conventional bolt together styles could take up to 2 hours. Cliplock* curbs can be assembled on the ground and hoisted into position or assembled at the correct location on the roof. These curbs are manufactured of heavy gauge galvanized steel, with factory installed wood nailer strips and supplied gasket materials. Duct support braces are hook over self locating style. Curb heights of 14″, 18″ and 24″ are standard. Custom curb heights and sloped arrangements are available to suit project requirements. Internal insulation can be factory installed for those projects that require additional sound reduction or thermal effectiveness. The Cliplock* roof curb can be manufactured in aluminum or stainless steel.