Seattle, WA
[heading-style-h3]Winter Project: 70 Penetrations Stabilized on a Multifamily Roof[heading-style-h3]
<<A large multifamily roof reached a non-certifiable condition after years of wear and seam deterioration. Flat Roof Pros restored the system in the middle of winter without tear-off, delays, or disruption to residents.>>
[heading-style-h4]Project Overview[heading-style-h4]
[heading-style-h6]The Situation[heading-style-h6]
A condominium property contacted Flat Roof Pros after concerns grew about the reliability of their aging roof system. Although widespread interior leaks had not yet begun, inspection findings showed the roof could no longer be certified due to advanced wear and failing details. The roof surface contained numerous transitions and penetrations, making temporary repairs risky and unpredictable. The property needed a structured restoration plan completed before small issues became emergency situations.
[heading-style-h6]The Client[heading-style-h6]
This project involved a 12,500 sq. ft. roof on an occupied multifamily condominium building. Mechanical equipment, skylights, vents, and service lines created 70 separate penetrations across the surface.
The property owner needed more than just a simple fix. They needed:
- A clear understanding of the roof’s condition
- Visual proof of what required attention
- Confidence in the recommended solution
- Consistent communication throughout construction
- A way to complete the work successfully during winter
[heading-style-h4]Challenges[heading-style-h4]
- Roof in a non-certifiable condition
- Widespread seam fatigue across the field
- Deterioration at corners, curbs, and vertical transitions
- 70 penetrations acting as potential leak sources
- Previous repairs losing effectiveness
- Perimeter metal details requiring restoration
- Work had to be executed in January winter conditions
[heading-style-h4]Solution[heading-style-h4]
The project was scheduled around a favorable winter weather window, allowing proper installation and curing.
- Drone inspections capturing photos and video of existing conditions
- Review meetings explaining findings and options
- Full surface preparation and cleaning
- Systematic seam repair and reinforcement
- Precision waterproofing at all 70 penetrations
- Monolithic silicone membrane installation across the roof
- Restoration of metal perimeter details
- Crane-supported logistics to speed installation and improve safety
- Daily progress photos delivered to the client
[heading-style-h4]Completed Project[heading-style-h4]
The result was not only a restored roof, but a process the board could see, understand, and trust.
- Roof moved from non-certifiable to fully protected
- All penetrations sealed and reinforced
- Seam vulnerabilities eliminated under a continuous membrane
- Work completed in roughly one week
- Residents remained undisturbed
- The board received ongoing visual confirmation of progress
- System qualified for a 20-year manufacturer warranty
- Backed by a 20-year Flat Roof Pros workmanship warranty
Need Your Roof Fixed During the Winter Season?
Cold weather doesn’t stop roof deterioration. Flat Roof Pros plans, documents, and executes winter projects with the structure and communication needed for confident decisions.
Serving Des Moines Washington and surrounding regions
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Head Office
Seattle, Washington
3420 C St NE, Unit 403
Auburn, WA 98002
Eastern Washington Office
Spokane, Washington
601 W 1st Ave, Suite 1400
Spokane, WA 99201
Oregon Office
Portland, Oregon
650 NE Holladay St, Ste 1600
Portland, OR 97232