Gresham, Oregon, is the fourth-largest city in Oregon and the second most populous city in Multnomah County, located immediately east of Portland, with a 2020 census population of 114,247. The city’s growth trajectory sets it apart from every other community in the Portland Metro area: population tripled every decade for three consecutive decades, starting at 3,944 residents in 1960 and reaching 65,235 by 1990. The largest single decade of that growth, from 1980 to 1990, added 35,230 people to the city. That wave was driven by the annexation of Rockwood, Powell Valley, Orient, and Pleasant Valley, and by the conversion of east Multnomah County farmland into the apartment communities, condominium complexes, and HOA-governed residential developments that now define the city’s built landscape. Pacific Building Solutions holds Oregon Contractor License #215897 and has served the Portland Metro multi-family market, including Gresham’s substantial 1980s and 1990s housing inventory, for nearly 30 years.

The 1980s represented Gresham’s dominant construction era. The apartment communities, condo associations, and multi-family housing developments built to absorb that decade’s 35,000-person growth wave are now 35 to 45 years old. In the Pacific Northwest climate, that age range is the primary window for siding system failure, weather barrier deterioration, water intrusion, and, in many cases, the secondary structural damage and mold growth that those conditions produce. The LP Outer-Seal siding installed as the dominant low-cost cladding product in Pacific Northwest multi-family construction during those decades is now at or beyond its documented failure threshold throughout the Gresham corridor.

We do not perform small residential repairs or new construction. Our work is focused on large-scale commercial and multi-family envelope remediation for HOA boards, property managers, construction attorneys, and ownership groups.

• Concentrated 1980s Build Era: Gresham’s largest growth decade produced a concentrated wave of multi-family construction across a relatively narrow window. Properties built between 1980 and 1990 share common envelope vulnerabilities at the same age. LP siding, missing flashing, inadequate weather barriers, and early aluminum window systems are consistent findings in our assessments throughout this corridor.
• LP Siding Concentration: LP Outer-Seal siding was the dominant low-cost cladding product installed on multi-family construction in the Pacific Northwest from the mid-1970s through the late 1990s. Gresham’s 1980s build era falls squarely within that window. Multi-family properties in this corridor that have not yet undergone siding replacement are likely carrying LP siding and the compound water intrusion risk that product’s failure produces.
• Sandy River and East County Moisture Environment: Gresham’s position at the base of the Mount Hood corridor, with the Sandy River to its southeast and the Columbia River floodplain to its north, creates ambient moisture conditions that compound the vulnerability of building envelopes for properties throughout the city.
• Oregon State Licensing: We hold Oregon Contractor License #215897 as our primary license for all work in Gresham and Multnomah County. We also hold Washington License #PACIFBS831MK for ownership groups managing cross-state portfolios.
• Award-Recognized: Portland Business Hall of Fame 2025 | Best of Portland 2025 (Construction) | Elite Preferred Siding Contractor | BBB Accredited Business.

LP Siding Replacement and Multi-Family Siding Programs

LP Outer-Seal siding replacement is the most common remediation scope we execute in Gresham’s 1980s multi-family inventory. Full LP removal, substrate assessment and repair, weather barrier restoration, and replacement with James Hardie fiber cement, Cedar, or Craneboard systems. We also address the window system and flashing failures that LP removal reliably reveals in buildings from this era.

Exterior Envelope Remediation

Full building envelope assessment and remediation for multi-family and commercial properties throughout Gresham. Our assessments are calibrated to the specific failure profiles of 1980s and 1990s Pacific Northwest multi-family construction, accounting for the Sandy River corridor’s moisture conditions and the building typologies common in Gresham’s rapid-growth annexation areas.

Water Intrusion Repair and System Restoration

LP siding failures and weather-barrier deficiencies are the primary drivers of water intrusion in Gresham’s older multi-family stock. We trace the source through the full building section, restore the system, and document every phase for HOA boards, property managers, and legal teams.

Construction Defect Repair and Forensic Consulting

When litigation or forensic consultant oversight applies, Pacific Building Solutions brings the documentation protocols and scope discipline required by those environments. We work alongside construction attorneys, owner representatives, and forensic consultants throughout Gresham and Multnomah County.

Window System Replacement

Phased window replacement in occupied multi-family buildings using Andersen, Jeld-Wen, Marvin, Cascade, Milgard, and triple-pane systems. LP siding removal in Gresham’s 1980s buildings frequently reveals failed window systems at rough openings, and we coordinate window replacement with siding programs for a complete envelope solution.

Mold Remediation and Structural Repair

Sustained LP siding failure and water intrusion in Gresham’s older multi-family inventory result in secondary mold growth and structural compromise at the sheathing and framing levels. We integrate mold remediation and structural repair into our siding replacement scopes rather than leaving those elements to separate contractors.

Does Pacific Building Solutions serve Gresham, Oregon?

Yes. Pacific Building Solutions serves Gresham and east Multnomah County for commercial and multi-family exterior envelope remediation, LP siding replacement, water intrusion repair, and related services. We hold Oregon Contractor License #215897 and Washington Contractor License #PACIFBS831MK, and have operated throughout the Portland Metro region for nearly 30 years.

How do I know if my Gresham multi-family property has LP siding?

LP Outer-Seal siding was the dominant low-cost cladding installed on multi-family and residential construction in the Pacific Northwest from roughly the mid-1970s through the late 1990s. Gresham’s primary 1980s build era falls within that window. LP siding is a wood-composite panel product that typically shows early failure at the bottom panel edges, horizontal joints, and around window and door openings. Signs include swelling, deterioration along joint lines, and soft spots on palpation. A full envelope assessment will confirm the product type, document the extent of failure, and scope the replacement program.

Does Pacific Building Solutions work on apartment complexes and HOA-managed condo communities in Gresham?

Yes. Multi-family apartment communities and HOA-managed condo properties are our primary project type. Gresham’s 1980s and 1990s multi-family inventory is concentrated and now at peak remediation age. We do not work on single-family homes or small residential repairs.

Can Pacific Building Solutions work alongside construction attorneys and forensic consultants on Gresham projects?

Yes. Litigation-adjacent and consultant-managed projects are a standard part of our practice. We work alongside construction attorneys, owner representatives, and forensic consultants on remediation programs throughout Gresham and Multnomah County.

Is Pacific Building Solutions licensed to perform commercial building remediation in Oregon?

Yes. We hold Oregon Contractor License #215897, which covers the full state of Oregon, including Multnomah County and Gresham. We also hold a Washington Contractor License #PACIFBS831MK. Both are active and current.

Gresham is a city in Multnomah County, Oregon, located immediately east of Portland in the Willamette Valley. The community was settled by white emigrants in the 1850s as an agricultural area in Powell’s Valley, and the arrival of the Springwater Division Rail Line from Portland in 1903 accelerated its growth as an accessible suburb. The city was incorporated on February 11, 1905, named after Walter Q. Gresham, Postmaster General under President Chester Arthur, due to what the Oregon Encyclopedia describes as a postal naming error. Mt. Hood Community College opened in northeast Gresham in 1966 and today serves approximately 30,000 students annually.

Gresham’s defining characteristic is its growth trajectory. The population grew from 3,944 in 1960 to 10,036 in 1970, to 33,005 in 1980, to 65,235 in 1990, tripling every decade for three consecutive decades. The decade from 1980 to 1990 added 35,230 people, the largest single-decade increase in the city’s history, driven by major land annexations that brought Rockwood, Powell Valley, Orient, and Pleasant Valley into the city limits and converted agricultural land into residential and multi-family development. With a 2020 census population of 114,247, Gresham is the fourth most populous city in Oregon and an economic center for eastern Multnomah County.

If you represent an HOA board, multi-family property management group, construction attorney, building envelope consultant, or commercial ownership group with a property in Gresham or east Multnomah County, 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 Beaverton, the greater Portland Metro area, and Southwest Washington.