The proposed equipment
We need the submittal for the new unit before we measure anything: its footprint, weight, curb size and where the duct and gas connections land. A replacement unit from a different manufacturer often needs an adapter curb or a new curb altogether.
The mechanical contractor or engineer chooses the equipment and its support. We tell them what the roof is made of, how thick it is and where the drains and seams are. We do not decide whether the deck can carry the new weight; the structural engineer does.
For offices near Brand Boulevard, we ask the building manager about access routes, crane permits and any spaces below the work, such as server rooms or studios, that need extra protection or off-hours scheduling.
If the unit model changes after we price the job, we update the curb dimensions and the flashing before anything is ordered.
The roof elevation and connection
Flashing has to run high enough up the curb, usually at least 8 inches above the finished roof, to keep water out during heavy rain. We measure the curb height, the roof thickness around it and nearby wall flashing to make sure the new detail has enough room.
If the roof is being recovered or new insulation is going on, the roof gets thicker and an old curb can end up too short. We raise it to suit.
The curb flashing has to match the roof. On TPO or PVC we heat-weld the flashing; on EPDM we use the manufacturer's tape and adhesives; on built-up or modified bitumen we use compatible base and cap sheets. Our penetration flashing work follows the same rule.
We price the curb or support work and the roofing separately, but schedule them together. The owner can see exactly who is building the support, who is flashing it, and what each part costs.
The Glendale site plan
Around the Glendale Galleria and West Broadway, crane lifts and deliveries usually need to happen before stores open or on set days. We get those rules from property management at the first site visit.
Industrial buildings along the San Fernando Road corridor often have yards and loading docks, but trucks and forklifts are moving all day. We plan the crane position and street access with the operator and, when needed, a city permit.
Glendale's hot, dry summers and rainy winters make most of the year workable, though midsummer roof temperatures push work to the morning. Santa Ana winds can halt crane lifts, so we build some slack into the schedule.
New equipment, heavier units and structural changes often require a building permit. We confirm with your engineer and contractor which permits apply and keep the approved drawings with the job file.
Talk through the equipment interface together
Send us the new unit's specs and any roof drawings you have. We will inspect the curbs, price the roof work and coordinate with your mechanical and electrical contractors.
Related Roofing Pages
Other services, systems and conditions Glendale owners often review alongside this one.
Questions About Rooftop Equipment Curbs and Supports
Sometimes. It depends on the new unit's size and weight and the curb's condition. If the footprint differs, an adapter curb or new curb is needed, and if the unit is heavier, a structural engineer should confirm the support. We flash whatever curb is approved.
It avoids new holes, but not every issue. The supports still add weight, can wear the membrane and can block drainage. We put protection pads underneath and place them clear of drains and water paths.
The building engineer and the mechanical contractor. They set the shutdown times and procedures, and our crew schedules the roofing around them.
The equipment layout, curb and flashing details, photos, product information and any open items. Keeping these in the facility file makes the next equipment change or repair much easier.