Commercial roofing for Pacific Northwest businesses.
The commercial division installs and replaces TPO membrane, EPDM, modified bitumen, and standing-seam metal on Pacific Northwest office, retail, and light-industrial buildings up to roughly a hundred and twenty thousand square feet single-roof. We do about forty commercial projects a year. Astrid Lindqvist-Brenner runs the division; Daniel Echeverria foremans the crews; the rest of the Cascade commercial team has been together, more or less, since 2014.
The Pacific Northwest commercial roofing market is not the storm-replacement market that dominates the Sun Belt. Our commercial work is almost entirely scheduled re-roofs at end-of-life, scheduled tear-offs on building purchases, and scheduled additions for tenant build-outs. We bid these jobs methodically. We schedule them around tenant operations. We do not leave a section of roof unsealed overnight, ever, in this climate.
TPO membrane. Carlisle or Firestone.
TPO (thermoplastic polyolefin) is the dominant commercial low-slope membrane for new construction and re-roofs in the Pacific Northwest, and it is roughly half of what our commercial crew installs in a given year. We install two manufacturers: Carlisle SynTec Sure-Weld and Firestone UltraPly TPO. Sixty-mil thickness as the standard; eighty-mil where the spec calls for it. Mechanically attached on most office and retail buildings; fully adhered where the deck and the wind uplift require it.
Every TPO project is heat-welded at the seams by a Cascade crew member who has run the same Leister hot-air welder for a decade. Detail flashings are pre-formed corner boots, hand-welded T-joint patches, and metal counterflashing terminations. We carry the Carlisle and Firestone twenty-year NDL (No Dollar Limit) labor-and-material warranty on every TPO roof we install.
EPDM. Carlisle or Firestone.
EPDM (ethylene propylene diene monomer) is the long-tenure incumbent in commercial roofing — a black synthetic rubber membrane installed in North America since the late 1960s. It is the right material for warehouses, light-industrial buildings, and any project where the spec calls for forty-plus years of durability without recoat. We install Carlisle Sure-Seal EPDM and Firestone RubberGard EPDM, ninety-mil thickness, fully adhered with low-VOC bonding adhesive. Seams are bonded with three-inch factory-applied seam tape; T-joints are hot-air-welded or sealed with the manufacturer’s flashing tape.
EPDM’s expected service life in the Pacific Northwest is forty to fifty years. We warranty the workmanship for twenty.
Modified bitumen. Three-ply hot-mopped.
Modified bitumen — typically SBS (styrene-butadiene-styrene) base sheet, smooth interply, and granular cap sheet — is the right system for light-industrial buildings, food-service buildings, and any commercial structure with heavy foot traffic, mechanical loads, or rooftop equipment. We install GAF Ruberoid, Soprema Sopralene, and Firestone SBS systems. Hot-mopped on most installations; cold-applied where the building’s mechanical or fire-code spec requires it.
Modified bitumen carries higher initial cost than TPO but is the most puncture-resistant system in the commercial roofing vocabulary, and it is significantly more forgiving of rooftop foot traffic. Expected service life is twenty-five to thirty-five years.
Commercial standing-seam steel.
For commercial pitched roofs — retail, mid-size office, the occasional architectural commercial design — we install twenty-four-gauge Galvalume standing-seam in eighteen-inch panel widths, mechanically seamed, Kynar 500 PVDF finish. Concealed fastener. We do not install exposed-fastener metal on commercial.
Standing-seam steel is the longest-tenure commercial pitched-roof material we install. Expected service life is fifty to seventy years.
Reference projects.
The Burnside Building
Portland · Six-story Class B office. 18,200 sqft TPO re-roof in two phases over occupied tenant space. Completed September 2025.
CARLISLE 60-MIL · MECHANICALLY ATTACHED · 20-YEAR NDL WARRANTYTualatin Distribution Center
Tualatin · Single-tenant warehouse. 64,000 sqft EPDM re-roof in four phases over weekends. Completed June 2025.
FIRESTONE 90-MIL · FULLY ADHERED · 20-YEAR NDL WARRANTYSalem Retail Plaza
Salem · Mixed-tenant retail. 9,800 sqft commercial standing-seam re-roof. Completed April 2025.
24-GAUGE GALVALUME · KYNAR 500 · 30-YEAR COLOR WARRANTYWhat a commercial re-roof costs.
Indicative figures for tear-off-and-replace projects in the Portland metro, 2026 dollars, excluding tapered ISO substrate beyond two inches average and any structural-deck repair.
Questions facilities directors have asked us.
Do you handle commercial roof tear-off in occupied buildings?
Yes. About sixty percent of our commercial work is on occupied buildings — office, retail, light-industrial. We schedule around tenant operations, work in phased sections, and never leave a section unsealed overnight. The Pacific Northwest does not give you that option. Our project manager coordinates resident or tenant notification, parking-lot logistics, and crane staging.
What’s the typical project size you take?
We bid commercial projects from four thousand square feet (small retail strip) to a hundred and twenty thousand square feet single-roof (large warehouse or distribution center). The sweet spot for our crew is twelve thousand to forty thousand square feet. Above a hundred thousand we partner with a Carlisle or Firestone factory-certified install crew for additional manpower; the project is still managed end-to-end by Daniel.
Do you carry the insurance commercial GCs require?
Yes. Two million per occurrence, four million aggregate general liability, plus a separate two-million umbrella, plus workers comp on every crew member, plus pollution liability for any abatement project. Certificates available on request from Astrid within one business day.
What’s the turnaround on a commercial bid?
Typically seven to ten business days for a detailed scope with line-item pricing and a project schedule. We will give you a budget number on the phone after a fifteen-minute conversation about the building, the square footage, and the membrane currently on the roof. We will tell you on the phone if we are not the right firm — sometimes we are not.
Do you do warranty work on existing commercial roofs?
We do not service warranties from other contractors — Carlisle and Firestone require that warranty work be performed by the original certified installer. We do service every Cascade-installed commercial roof for the duration of the workmanship warranty (twenty years, in writing). If your roof is a Carlisle SynTec or Firestone GenFlex installed by another firm, call the original installer first; we can recommend one if you do not know who installed it.
Tell us about the building. Astrid will call you back.
We’ll send a commercial estimator within the week. Phased scope, line-item pricing, named project manager, certificate of insurance with your name as the additional insured.