Rooftop HVAC units often sit on a concrete equipment curb / roof curb—a raised curb or curb-and-pad detail on the roof that supports the unit, frames openings, and manages water around the equipment—not the same hire as a ground-level AC condenser pad in the yard. PNW rain, freeze at curb faces, vibration, and concentrated unit loads stress those rooftop curbs; then cracks, scale, ponding at the curb line, and out-of-level seating show up. Facility managers and building owners across King, Snohomish & Skagit often land here after an HVAC changeout bid that bundled a new curb pour, a ground-condenser brochure that felt wrong for a roof, or a thin coat quote that ignored rocking rooftop curbs. This is an honest restore-first guide to HVAC roof curb concrete Seattle: when patch or limited curb restore still fits, when section replace / new curb is the durable call—and why Olsen will not publish OEM curb-height charts or forever-waterproof roof warranties. Start with a complimentary phone/photo review; the on-site assessment is credited if you proceed. Call 425-215-2560.
HVAC roof curbs here means concrete rooftop equipment curbs / curb-and-pad details under RTUs, package units, or similar rooftop mechanical—not a ground-level AC condenser / heat-pump yard pad, not a standby generator pad, not a parking-lot light-pole base, and not a dumpster enclosure floor. Surface wear, light scale, modest cracks, or cosmetic edge chips on a sound, stable, reasonably level curb may allow patch or limited restore. Rocking curbs, washed-out or failed curb seating, chronic ponding at the curb line, vertical displacement, or a host that cannot keep the rooftop unit level and serviceable usually need section replace or a new curb—not a thin coat under a vibrating rooftop unit. Olsen scopes light commercial exterior / rooftop-accessible flatwork when access and candidacy allow—not HVAC install, refrigerant recovery, roofing membrane warranty work, or forever-waterproof roof warranties as primary trade.
Ground outdoor condenser pads live on AC condenser & HVAC pad concrete. Send photos for a complimentary phone review, then book the on-site assessment, credited to your project if you proceed. Call 425-215-2560 (Mon–Sat 7:00 AM–6:00 PM).
Rooftop splash, freeze–thaw at curb faces, and unit vibration stress equipment curbs. Olsen does not publish OEM curb-height charts or forever-waterproof roof warranties.
Low spots at the curb hold water and accelerate scale. Drainage still matters—see fix drainage before resurfacing (rooftop context).
Unit changeout, refrigerant, and roofing membrane warranty work are adjacent trades. Send photos, then book the on-site assessment, credited to your project if you proceed. Call 425-215-2560.
Light scale, modest cracks, or cosmetic edge chips on a true-sitting, reasonably level curb may allow patch or limited restore. On rooftop curbs, an overlay fits only when the host truly qualifies—see concrete overlays.
Whether the rooftop unit can be lifted or temporarily supported by others affects phasing. Olsen does not publish crane packages or refrigerant disconnect online.
Rocking, chronic ponding at the curb line, and out-of-level seating need section replace / new curb—not a thin coat under a vibrating RTU. Decision framing: overlay vs replacement and commercial overlay vs replace.
Send photos, then book the on-site assessment, credited to your project if you proceed. Call 425-215-2560.
National rooftop HVAC blogs invent neat OEM curb-height charts, forever-waterproof roof warranties, and skim-coat recipes under live RTUs. Treat competitor OEM tables as general guidance only. Olsen explains the roof-curb choice without publishing curb-height stamps, forever-waterproof warranties, or thickness recipes. Send photos for a complimentary phone review, then book the on-site assessment, credited to your project if you proceed. Call 425-215-2560.
If photos show a ground yard condenser, we route to the AC condenser pad page instead of forcing a rooftop curb scope.
Cost drivers: curb size, host soundness, prep, rooftop access / safety staging, whether the unit must be temporarily supported by others, coordination with roofing / HVAC trades, and whether section replace is required—not a published $/sq ft roof-curb chart. DIY blogs publish unit prices; treat those as general guidance only. Olsen does not publish $/sq ft online. Send photos, then book the on-site assessment, credited to your project if you proceed. Call 425-215-2560.
When comparing bids, ask whether the number is limited curb restore or a full new curb with roofing interface work by others. Mixing those scopes is how rooftop tickets get expensive twice.
Complimentary phone/photo review is the fastest roof-curb read for FMs and building owners. Send:
Call 425-215-2560 or start from contact. Hours: Mon–Sat 7:00 AM–6:00 PM. Lake Stevens service-area base · King, Snohomish & Skagit. Licensed, bonded, and insured. The $150 on-site assessment is credited toward the project if you proceed.
FM framing: facility managers. Serving King County, Skagit County, and Snohomish County. More answers: concrete repair FAQ.
More candidacy answers live on our concrete repair FAQ.
Sometimes—only if the host curb is still structurally sound and reasonably level after sounding. Call 425-215-2560.
No. Ground condenser / heat-pump pads live on the AC condenser pad page. Rooftop equipment curbs are a separate job. Call 425-215-2560.
No. OEM and roofing tables are general guidance only. Call 425-215-2560.
Send wide + close-up photos. Complimentary phone/photo review → optional $150 on-site assessment credited if you proceed. Call 425-215-2560.
Send rooftop HVAC curb photos for a complimentary phone review. If a site visit is next, the $150 on-site assessment is credited toward the project if you proceed. Hours: Mon–Sat 7:00 AM–6:00 PM.
Or call 425-215-2560. Licensed · Bonded · Insured · Lake Stevens service-area base · King, Snohomish & Skagit.