Window System Replacement for Multi-Family and Commercial Properties in SW Washington and the Portland Metro

Window system failures are the most common single point of water intrusion entry in Pacific Northwest multi-family construction. Failed sealants at window perimeters, missing or improperly installed sill pan flashing, absent head flashing, and deteriorated frames are consistently present in envelope assessment findings on 1980s and 1990s multi-family buildings throughout the Portland Metro and Southwest Washington region. When a window system failure is the driver of water intrusion, replacing the siding around the window without replacing the window system itself creates a new exterior assembly with the same water intrusion pathway that caused the original damage. Pacific Building Solutions is licensed in Oregon (License #215897) and Washington (License #PACIFBS831MK) and replaces window systems in occupied multi-family and commercial buildings throughout the Portland Metro and Southwest Washington region as part of envelope remediation, construction defect, and capital improvement programs.

We do not replace windows in single-family homes or perform small residential window repair. Our window replacement practice is focused on occupied multi-family buildings and commercial properties, where phased scheduling, envelope-integrated installation, and the documentation requirements of HOA boards, property managers, construction attorneys, and forensic consultants are integral to the scope.

Why Window System Replacement in Pacific Northwest Multi-Family Buildings Requires Envelope Integration

A window system in a multi-family building is not a product. It is an assembly. The window unit itself, the frame and glazing, is one component. The installation details that integrate the window with the building envelope, the sill pan flashing, the head flashing, the building paper lapping over the installation flanges, and the sealants at the perimeter determine whether the window functions as part of the weather protection system or becomes a water intrusion pathway.

Window systems installed in Pacific Northwest multi-family construction during the 1980s and 1990s were routinely installed without sill pan flashing, with building paper lapped incorrectly around the opening, and with sealants as the primary water management strategy at the perimeter. Sealants in this climate fail. When they do, water enters the rough opening directly and migrates into the wall cavity behind the window. Replacing windows without correcting the flashing and weather-barrier integration at the rough opening leaves the new windows with the same water-intrusion vulnerability as the systems being replaced. We do not install new window systems over uncorrected rough openings.

windows-more-than-glass

Window Products We Install

  1. Andersen Windows and Doors

    Andersen windows and doors are appropriate for a range of multi-family and commercial applications where performance, warranty, and aesthetic requirements align with the Andersen product line. We install Andersen 100 Series, 200 Series, and 400 Series products depending on the application, budget, and the forensic consultant’s or HOA’s specifications. All Andersen installations include correct sill pan flashing, head flashing, and weather barrier integration at the rough opening.

  2. Jeld-Wen Windows

    Jeld-Wen windows are commonly specified in multi-family construction defect remediation programs and capital improvement scopes. We install Jeld-Wen products to manufacturer specifications with envelope-integrated installation details appropriate to the Pacific Northwest climate. Jeld-Wen’s product range covers a variety of window types and sizes common in the multi-family building stock we serve.

  3. Marvin Windows and Doors

    Marvin windows and doors are specified on multi-family and commercial projects where performance requirements, aesthetic standards, or HOA specifications call for a premium product. We install Marvin products with the same envelope integration discipline applied to all window replacement scopes, ensuring that the quality of the product is matched by the quality of the installation details that make it perform.

window-replacement-process

  1. Cascade, Milgard, and Regional Product Lines

    Cascade and Milgard windows are regional product lines commonly specified in Pacific Northwest construction and frequently used in multi-family replacement programs where budget, availability, and product profile requirements align with their product lines. We install both products to the manufacturer’s specifications, with full-envelope integration at the rough opening.

  2. Triple-Pane Window Systems

    Triple-pane window systems are specified for multi-family projects with elevated thermal performance requirements, high-elevation exposures subject to freeze-thaw cycling, or HOA standards that require enhanced glazing performance. We install triple-pane systems to manufacturer specifications, with installation details and rough-opening preparation required for their weight and performance characteristics.

  3. Rough Opening Preparation and Envelope Integration

    Every window replacement scope we execute includes assessment of the rough opening condition, repair of deteriorated framing or sheathing at the opening, installation of sill pan flashing, correct weather barrier lapping at the installation flanges, head flashing above the window, and perimeter sealant applied as a secondary water management measure rather than a primary one. This is the installation sequence that produces a window system that functions as part of the building’s weather protection assembly rather than as a penetration through it.

Who Engages Pacific Building Solutions for Window System Replacement

window-replacement-experience
  • HOA boards and condo associations whose window systems have been identified in forensic assessments as a primary water intrusion driver and who need a contractor with the documentation depth and envelope integration discipline their replacement scope requires
  • Multi-family property managers managing window replacement programs in occupied apartment communities where phased scheduling across occupied buildings and weather protection throughout the scope are active requirements
  • Construction attorneys who need a licensed contractor to execute window replacement scopes in construction defect programs under legal oversight with full documentation of installation details and rough opening conditions
  • Building envelope forensic consultants who have specified a window replacement and rough opening remediation scope and need a contractor to execute it accurately with complete field documentation of conditions found and work performed
  • Ownership groups and asset managers overseeing multi-family rehabilitation programs where window replacement is a capital component requiring documented installation and manufacturer warranty

FAQ: Questions HOA Boards and Property Managers Ask About Window System Replacement

How do we know if our building's window systems are causing water intrusion?

Common indicators include staining on interior wall surfaces at window corners, soft or spongy drywall at window jambs and sills, visible failed sealant at the window perimeter on the exterior, condensation between panes in double-pane units indicating a seal failure, and mold growth at the window base trim on interior walls. These symptoms indicate that water is entering the wall assembly at the window opening. A building envelope assessment that includes selective wall openings at affected windows is the most reliable way to confirm the extent of water intrusion and the condition of the rough opening behind the window frame.

Can window systems be replaced in an occupied multi-family building without displacing residents?

Yes. Phased window replacement across occupied multi-family buildings is standard for our team. We sequence window replacement across units and building faces to maintain weather protection at all open openings, limit the time any opening is without a window unit, and coordinate access with residents and property management. Entire-unit vacations are rare and are only required when the rough-opening condition requires structural repair that cannot be managed around the occupied unit.

What is typically found behind failing window systems when the wall is opened?

In Pacific Northwest multi-family buildings from the 1980s and 1990s, opening a wall at a failing window system typically reveals one or more of the following: missing or improperly installed sill pan flashing, building paper lapped over rather than behind the window installation flange, failed or absent head flashing, saturated sheathing at the rough opening corners where water has been accumulating, and in some cases, structural deterioration at the rough opening framing. These conditions are addressed as part of the window replacement scope before the new window is installed.

Is Pacific Building Solutions licensed to perform window system replacement in Oregon and Washington?

Yes. We hold Oregon Contractor License #215897 and Washington Contractor License #PACIFBS831MK. Both are active and current. We are fully licensed and insured for commercial and multi-family window system replacement throughout our service area.

Commercial and Multi-Family Exterior Contractor

Our Commercial and Multi-Family Services

Water Intrusion Repairs | Pacific Building Solutions

Water Intrusion Repairs

System-level water intrusion repair for multi-family and commercial buildings. We identify the envelope failure source, repair the system, and document every phase.

Commercial Building Repairs | Pacific Building Solutions

Construction Defect Repairs

Construction defect repair programs for HOA communities and commercial properties, executed under forensic consultant and attorney oversight with legal-standard documentation.

Mold Remediation Repairs | Pacific Building Solutions

Mold Remediation

Mold remediation integrated into the envelope repair scope that addresses the water intrusion source — not a surface treatment that allows mold to return.

Structural Repairs | Pacific Building Solutions

Structural Repairs

Rim joist, bottom plate, sheathing, and stud repair caused by envelope failure — executed as part of the envelope repair scope, not passed to a separate structural contractor.

Forensic Envelope Consulting | Pacific Building Solutions

Forensic Envelope Consulting

Expert building envelope assessment, failure analysis, repair scope development, and litigation support for attorneys, HOA boards, and owner representatives.

Commercial Building Repairs | Pacific Building Solutions

Commercial Building Repairs

Imagine your commercial building as a living organism requiring regular maintenance and attention to stay in optimal condition.

Capital Improvements | Pacific Building Solutions

Exterior Capital Improvement

Multi-year, reserve-funded exterior capital improvement programs for HOA-governed communities and commercial properties. We phase siding, window, envelope, and painting work across construction seasons in alignment with reserve fund availability and coordinate documentation for reserve study updates.

Commercial Siding

Commercial and Multi-Family Siding

Large-scale siding replacement for multi-family and commercial properties, executed as envelope restoration programs that restore the weather barrier and flashing behind the cladding before new siding is installed. We replace James Hardie fiber cement, Cedar, Craneboard, Stucco/EIFS, and LP Outer-Seal siding systems.

Commercial Exterior Painting

Commercial Exterior Painting

Exterior coating programs for multi-family and commercial properties, coordinated with siding and envelope remediation scopes as the final phase of a restoration program. All exterior painting includes substrate assessment before coating application. Because paint failure in the Pacific Northwest is almost always a moisture signal, not a paint quality problem.

Commercial Interior Painting

Commercial Interior Painting

Interior painting for multi-family common areas and commercial buildings, including post-water-intrusion and post-mold-remediation painting with stain-blocking primers on all affected surfaces. We coordinate interior painting within larger repair and remediation programs as the final phase rather than as a separate scope.

Window systems

Window System Replacement

Phased replacement of window systems in occupied multi-family and commercial buildings, with every installation including sill pan flashing, head flashing, and full weather barrier integration at the rough opening. We install Andersen, Jeld-Wen, Marvin, Cascade, Milgard, and triple-pane systems.

Exterior Envelope Remediation

Exterior Envelope Remediation

Systematic restoration of the full building envelope as a functioning weather protection system, from cladding through weather barrier, flashing, sheathing, and structural framing. Exterior envelope remediation is our primary practice. Every process we have is built around executing it in occupied multi-family and commercial buildings.

Consultants and Attorneys

Consultants and Attorneys

Dedicated information for forensic building envelope consultants and construction attorneys on how Pacific Building Solutions operates within consultant-managed and attorney-directed remediation programs: scope execution as specified, field condition reporting, legal-standard documentation, and communication protocol compliance.

Multi Family Exterior Services

Multi-Family and Commercial Exterior

A full overview of every exterior service Pacific Building Solutions provides for multi-family and commercial properties, including why managing all exterior systems under a single contractor with envelope expertise produces better outcomes than dividing the work across multiple vendors.

Planning a Multi-Unit Exterior Project?

If you represent a multi-family property management group, HOA board, or commercial ownership group with an interior painting scope in Oregon or Washington, Pacific Building Solutions welcomes the opportunity to discuss your project.

Phone: 360-907-1128

Email: info@pacificexteriorsnw.com

Licensed in Oregon (#215897) and Washington (#PACIFBS831MK). Serving the greater Portland Metro area and Southwest Washington.