Tear-Off Replacement When a Recover Won't Hold
The replacement plan explains tear-off or recover assumptions, insulation and drainage needs, occupied-building phasing, system options, and closeout requirements. Full tear-off replacement is the answer once an Ann Arbor roof has absorbed too much water, too many patch cycles, or too many freeze-thaw seasons for a recover to make sense. It's also the only path when the deck itself needs repair, since nothing built on top of a compromised deck will perform regardless of membrane choice.
Reading the Deck Once the Old Roof Comes Off
Tear-off is the point where assumptions get replaced by what's actually under the membrane. Steel decks near coastal-style exposure aren't the concern here that they are on the Gulf Coast, but decades of trapped moisture from a failed roof can still corrode fasteners and thin steel flutes enough to require replacement sections. Concrete decks show spalling and rebar exposure where water has been sitting. Wood plank decks common on older commercial buildings near downtown can show rot at joints that a surface inspection never would have caught.
We document deck condition with photos before any new insulation goes down, because deck repair is one of the most common change-order items on a tear-off and owners deserve to see the evidence rather than take our word for it.
Wet Insulation Removal Isn't Optional
Every square foot of saturated insulation board that stays in the assembly keeps working against the new roof. On older built-up roofs around campus, we frequently find insulation that's wet well beyond the drains, spreading across broad low areas where the deck itself has developed a slight sag over decades of service. Full tear-off means all of it comes out, down to a dry deck, before new polyiso goes back down in the thickness needed to hit current energy code targets.
Structural Review for Michigan's Snow Load
Southeast Michigan gets a mix of dry powder snow and heavier wet snow events, particularly during late-winter storms that bring warmer air behind them. Wet snow carries meaningfully more weight per inch than dry powder, and older commercial buildings weren't always designed with today's ground snow load values in mind. Before we finalize a tear-off and replacement spec, we confirm the structural deck and framing can carry the new assembly's dead load plus the drifted and ponded snow conditions specific to that roof's parapets and rooftop obstructions.
Sequencing Tear-Off on an Occupied Building
Tear-off work on a building that stays open, whether it's a medical office, a retail strip, or a university-adjacent office block, gets broken into sections sized to what can be torn off, insulated, and dried in within a single work shift. Overnight weather risk on an open deck is not something we gamble with in a climate that can shift from clear to a fast-moving thunderstorm cell with little warning in summer, or from workable temperatures to a hard freeze overnight in shoulder season.
We plan the sequence with these constraints in mind:
- Daily tear-off area sized to guarantee same-day dry-in regardless of crew size
- Weather monitoring with a hold point if storm cells are tracking toward the site
- Debris chutes and staging that keep loading docks and building entries clear during business hours
- Noise and odor windows coordinated with tenants, classrooms, or patient areas below
- Crane and material hoist locations that don't block fire lanes or emergency access
- Temporary protection materials staged on site in case conditions turn faster than forecast
Replacement Membrane and Insulation Decisions
Once the deck is confirmed sound and dry, the replacement assembly gets specified against the building's actual use rather than a default. Refrigerated or lab buildings get closer attention to vapor drive and insulation placement; standard office and retail roofs get a more conventional polyiso-and-membrane build. Where an owner is deciding between single-ply options, our TPO single-ply roofing and EPDM commercial roofing pages lay out the tradeoffs specific to this climate.
Disposal and Site Cleanup on a Full Tear-Off
A tear-off generates more debris volume than most owners picture until it's staged in dumpsters along a loading dock or parking area. We plan container placement and swap schedules around the building's normal deliveries and trash pickup, and we sweep and magnetically clear the roof surface and adjacent grounds of loose fasteners and debris at the end of every phase, not only at the close of the job. On buildings near pedestrian walkways or student housing, that daily cleanup matters as much as the roofing work itself.
Tear-Off and Replacement Questions Owners Ask
How do you know if we need tear-off instead of a recover?
Deck condition and wet insulation extent decide it. If the deck needs repair or moisture has spread broadly, a recover just adds a layer over an unresolved problem.
What happens if it rains mid-tear-off?
We size daily work areas to finish and dry in before end of shift, and we hold tear-off starts if storm cells are tracking toward the site. Temporary protection stays staged on site as a backup.
Will tear-off replacement change our roof's snow performance?
It can, depending on the new insulation thickness and any tapered crickets added at drains. We review structural capacity for the new assembly's weight plus expected drift and ponding before finalizing the design.
How disruptive is tear-off to a building that stays open?
More than a recover, since deck-level work generates more noise, but we phase it in sections and schedule the loudest work outside of critical hours where the building's use allows it.
Can old insulation and membrane be recycled?
Some membrane types have recycling paths depending on the hauler and material condition; we can discuss options at the estimate stage, though standard disposal through construction debris channels remains the default.