Multi-family property managers face immense pressure when hidden moisture infrastructure failures begin impacting residents inside their own homes. When a flat roof system neglects its primary job of shedding water, severe structural decomposition quickly transitions an out-of-sight asset into an immediate operational crisis.
For an apartment complex located near the Mall of America, chronic water intrusion had escalated to a point where tenant ceilings were actively rotting. The owner turned to our commercial roofing experts to execute a comprehensive technical turnaround. Addressing multiple active leaks required a deep intervention to stabilize the building envelope and protect the long-term equity of the residential real estate asset.
RN Roofing completed a full multi-family asset turnaround by delivering an EPDM roofing installation in Bloomington, Minnesota, featuring a complete tear-off and brought the system to an R-30 insulation rating. The project covered 110 squares and was completed in 3.5 days, successfully eliminating active water intrusion and structural rot.
Key Takeaways
- THE CHALLENGESevere flat roof neglect resulted in active interior apartment leaks, structural mold, and ceiling rot that threatened tenant safety.
- THE SYSTEMCrew members completed a total tear-off down to the bare deck, installing polyisocyanurate boards topped with a durable ballasted rubber membrane.
- THE RESULTThe team completely dry-in the facility covering 10,500 square feet of residential space in under four days of total on-site labor.
The macro-objective of this intervention focused on achieving absolute structural stabilization through modern commercial roof replacements. The client required a durable, low-slope membrane capable of handling intense local freeze-thaw cycles while optimizing energy efficiency. Our field crew initiated an aggressive tear-off and material hoisting strategy to overhaul the roof with zero downtime for the residents below.
Project Summary
| Client Profile: |
Bloomington Multi-Family Apartment Complex |
| Project Location: |
Bloomington, Minnesota |
| Primary Objective: |
Commercial Roof Replacements |
| System Installed: |
EPDM Rubber Roofing |
| Measurable Impact: |
110 squares of material completely torn off and replaced down to the deck in 3.5 days. |
Evaluating Severe Apartment Moisture Damage
Our initial physical site inspection revealed extensive flat roof breakdown that had progressed past the point of simple localized patch repairs. Water had breached the historical protective layer, completely saturating the underlying insulation and collecting across the structural deck. This trapped moisture generated localized ceiling rot and mold inside the upper residential units, making an immediate structural intervention mandatory.
Because flat commercial systems can easily hide water migration, the property management team was unaware of the true scope of the subsurface saturation. Our team audited the roof perimeter, structural openings, and existing drainage points to determine that a complete substrate extraction was required. Leaving the compromised, wet materials in place would have allowed the wood and deck decay to compromise the building integrity.
How Is Ballasted EPDM Installed Efficiently?
The field installation process began with a rapid, controlled tear-off of all damaged, wet historical materials directly down to the bare deck structure. Once the surface was inspected and cleaned, technicians mechanically installed two separate layers of 2.5-inch open-cell polyisocyanurate insulation boards. This layered thermal configuration successfully brought the property up to an energy-efficient R-30 insulation rating.
"On that roof, we put on a new roofing system. We installed an EPDM ballasted roof, which is a rubber product. We put down two layers of 2.5 inch isocyanurate, which is an open cell hard board. Then we bring it to an R30 rating and loose lay the EPDM on top, finally holding it down with river rock."
After loose-laying the high-durability black rubber single-ply membrane, our crew utilized a heavy crane to lift and distribute smooth river rock ballast. This river rock ballast was applied at a precise weight of 1,000 pounds per square to secure the loose-laid system against extreme wind uplift. To guarantee absolute watertight security across the various plumbing penetrations, technicians installed specialized boots and routed new sewage vents. Property managers looking to maintain their structural integrity can routinely schedule Preventative Roof Maintenance to catch minor degradation before it requires a total overhaul.
Rapid Residential Roof Restoration Success
The installation of the new ballasted system delivered immediate operational protection and long-term asset value enhancement for the complex. By finishing 110 squares of flat roofing in 3.5 days, our crew minimized tenant disruption while stopping the structural degradation instantly. The black rubber sheet remains highly elastic through intense sub-zero temperatures, providing ideal resistance against severe winter climate challenges.
The rock ballast serves a vital dual purpose by shielding the vulnerable EPDM membrane from harmful ultraviolet rays and lowering cooling costs. The property management firm achieved total building security, eradicated their interior mold liabilities, and established a dependable 20-year return on investment. With the building completely dried in, interior trades safely initiated structural drywall repairs and aesthetic restoration within the affected apartments.
Protect Your Multi-Family Investment Today
We bring three generations of family-owned craftsmanship directly to complex commercial and residential multi-family challenges throughout Minnesota. Our certified field technicians understand how to manage rapid tear-offs and technical retrofits without interrupting your daily business operations.
Do you need help resolving these structural issues or upgrading your property in Bloomington? Contact our team to book your evaluation today.
Frequently Asked Questions
Why is river rock used on ballasted EPDM roofing in Bloomington?
River rock serves a critical dual function on commercial flat roofs. It provides the heavy downward force of 1,000 pounds per square needed to secure the loose-laid membrane against wind uplift, while simultaneously shielding the black rubber from structural ultraviolet degradation.
How does an R-30 insulation rating benefit commercial apartment buildings?
Achieving an R-30 insulation rating through two layers of 2.5-inch polyisocyanurate board drastically minimizes thermal bridging. This exceptional energy efficiency reduces the overall HVAC workload, dropping monthly climate control expenditures for property managers while stabilizing indoor resident comfort.
What is the expected lifespan of a ballasted commercial rubber roof?
A professionally installed ballasted single-ply system typically yields an operational lifespan of 15 to 20 years. Performing periodic check-ins, clearing away organic gutter blockages, and managing seasonal snow accumulation will help ensure the assembly achieves its maximum durability profile.