Insulated Roof Curb Detail

A rigid 1 1 2 3 insulation is attached to the inside of curb for thermal and acoustical properties.

Insulated roof curb detail.

Curb installation should be a part of the roof deck not on top of insulation or roofing materials. Roof support the roof must be capable of adequately supporting the weight of the rooftop unit as well as that of the curb. Specifications prefabricated roof curb to be manufactured of prime galvanized steel construction 20 18 16 or 14 gauge as required meeting astm a653 653m with welded corners and with seams joined by continuous water and air tight welds. The bottom of the curb has a 2 flange out on all 4 sides to secure and seal up easily when roofing material is applied.

Internally insulated with 1 1 2 thick 3 lbs. Top of all roof curbs shall be level with pitch built into curb when deck slopes. Specify prefab roof curbs for use with all roof penetrations and roof mounted equipment including and not limited to hvac units duct openings pipe penetrations power roof exhauster intake and relief vents flues or job fabricated items. Free cad detail download of a prefabricated roof curb to be used in your architectural section cad drawings.

Curb installation should be a part of the roof deck not on top of insulation or roofing materials. Curbs should be a minimum of eight inches above the finished roof and factory insulated to reduce condensation. Roof curb shall be internally reinforced with angles 48 on center and factory installed wood nailer. Roof opening for safety and sound considerations do not cut out the entire roof deck within the curb area.

Curbs should be a minimum of eight inches above the finished roof and factory insulated to reduce condensation. Must be insulated see figure 5 or figure 12. Pressure treated nailers should be provided by the curb manufacturer to receive roofing felts and eliminate noise transfer. Refer to figure 17 and tables 1 and 2 for specific center of gravity.

Specify prefabricated roof curbs and related products by a roof curb manufacturer not with or by the equipment manufacturer. The right insulated roof curb can mean fast installation saved time and money and a leak free roof penetration system at alta products llc we take pride in the quality and integrity of our work. The rc insulated roof curb is formed and welded from 16ga galvanized material with a wood nailer attached to the top. Heights to be 8 above finished roof deck or as detailed.

We use superior materials and hand welding techniques to create airtight seals. Allowing the highs to fit under the roof panel on the upslope and over the roof panel on the downslope to create a continuous water flow is critical to the function of the roof curb.