Industrial FlexSpace Roofing

Flex Buildings Change Tenants. The Roof Inherits Every One Of Them.

A flex building is the most honest record of its own history that exists on a property. Walk the roof of a multi-tenant shell off Center Street or out in the Frederickson industrial area and you can read the lease ledger in the membrane: a cluster of newer curbs where a tooling shop installed exhaust five years ago, a patched-over opening where a fitness studio's makeup-air unit used to sit, a run of abandoned conduit a defunct print operation left behind. We roof these buildings around a single assumption — the people who built it and the people who occupy it now are almost never the same, and nobody handed you a current penetration map.

Tacoma has a deep inventory of exactly this kind of building. The Port of Tacoma tideflats, the South Tacoma manufacturing belt along the rail corridor, and the newer pre-engineered shells out near 176th Street in Frederickson are full of 8,000-to-60,000-square-foot flex bays that flip between light manufacturing, contractor shops, last-mile staging, and showroom-plus-warehouse uses as leases turn. Each use drives different rooftop equipment, and each tenant improvement that came before yours either was flashed correctly or quietly wasn't.

We Survey The Penetrations Before We Quote The Square Footage

On most commercial roofs the field membrane is the project. On flex roofs the penetrations are the project. A single low-slope bay can carry packaged HVAC units, dedicated exhaust fans, plumbing vents, electrical and data masts, gas lines, skylights, and roof hatches — and on a multi-tenant building those items multiply by the number of suites. Our first deliverable is never a price. It is a marked-up roof plan with every penetration photographed, located, and graded: properly flashed, marginal, abandoned, or actively leaking.

That survey is where flex jobs are won or lost. Abandoned curbs left from a former tenant are a standing liability — temporary covers over a removed unit rarely survive a full Puget Sound wet season. We close abandoned openings permanently with new deck and insulation rather than capping them, document former-tenant penetrations that were never sealed to standard, and flag any item installed outside the original structural loading plan so the building owner sees it before, not after, the membrane goes down.

System Selection By Deck, Not By Template

The flex inventory in Tacoma splits cleanly by era. Older tilt-up and concrete-block shells in South Tacoma typically carry aged built-up or ballasted assemblies on steel or structural-concrete deck. For those we most often specify 60-mil TPO mechanically attached over new polyisocyanurate, with tapered insulation worked into the design to correct the dead-flat ponding these buildings develop over decades of foot traffic and equipment relocation. Where a building runs heavy rooftop traffic from multiple tenants' HVAC service crews, we step up to 80-mil TPO or 60-mil PVC fully adhered for the puncture and weld reliability that mechanical-service traffic demands.

The newer Frederickson and Fife shells are a different animal — pre-engineered metal buildings with standing-seam or R-panel roofs over open-web purlins. Those rarely call for a tear-off. We evaluate the existing panel and fastener condition against a silicone restoration coating or a retrofit standing-seam recover, weighing purlin spacing and load capacity before recommending either. The wrong call on a metal building is an expensive tear-off the structure never needed.

Coordinating Around Suites You Don't Control

You cannot shut down a flex building to reroof it. One suite is running CNC equipment two shifts a day, the bay next door takes refrigerated deliveries every morning, and a third sits vacant mid-lease-up. We build the work sequence off a bay-by-bay occupancy map from property management, identify which suites carry live rooftop equipment and which can tolerate an HVAC interruption, and route all tenant communication through the property manager so the crew never becomes the front desk for noise complaints. Every active suite gets confirmed watertight before we demobilize each day.

Built For The Owners And Managers Who Hold These Assets

Most flex buildings in this market are held by investors and managed by third parties, so our reporting is built for capital planning, not just for the immediate repair. Pricing is per roof square against a defined membrane spec, existing-assembly condition, and penetration density, delivered as a fixed-price proposal after a roof walk and core sample. Owners running several flex properties across Pierce County get condition reports on a consistent format so a portfolio can be ranked and budgeted year over year, and the closeout package — permit, manufacturer warranty, drain report, and an updated penetration diagram — becomes the document the next tenant improvement actually starts from.