Seattle N 18th Street Seven-Building Apartment Complex Siding Replacement

This Seattle apartment complex project on N 18th Street was built as a complete exterior case study, not just another list of siding materials. KV Construction looked at the apartment complex as a full wall system: what had to come off, what had to be checked behind the old siding, how water would be managed around windows and doors, and how the finished exterior should feel in its local Seattle setting.

A seven-building apartment complex siding project is a different challenge from a single-family re-side. The work has to be consistent across multiple elevations, durable enough for long-term property ownership, and organized so residents and property managers can move through the project with fewer surprises.

The core installation centered on 8 1/4-inch primed Hardie lap Cedarmill siding with a 7-inch reveal. Primed Cedarmill HardiePlank was a good match for this large-scale apartment complex scope because it gives property owners a repeatable, durable siding system across buildings rather than a patchwork of mismatched repairs. The work spanned all seven apartment buildings and included old panel siding removal, new OSB plywood, a full HardieWrap and flashing sequence, and consistent commercial-grade installation. This made the project more layered than a standard siding replacement and gave the final result a stronger, uniform sense of place.

A Multi-Building Scope That Needed Consistency

This was not a one-wall repair. The project involved a full Seattle apartment complex and a repeatable installation process, so consistency mattered across every elevation of the seven buildings. For property owners, that kind of system reduces the look of piecemeal repairs and makes long-term maintenance across the complex easier to plan.

Weather Barrier, Flashing, and Rain Control

Pacific Northwest siding work has to respect water, especially in Seattle. On this apartment project, the weather barrier was HardieWrap paper with 1 1/2-inch Hardie seam tape. Flashing details included 4-inch HardieFlash tape, 26GA head flashing, primed flashing, and Z metal flashing on blocks and windows. HardieWrap, seam tape, and detailed flashing created the water-management layer behind the siding, which is the part residents and property owners rarely see but rely on every Seattle winter. QUAD MAX sealant was used at key transitions so trim, blocks, windows, doors, and siding could work together instead of becoming separate weak points.

Material Choices That Fit the Property

The main siding choice was 8 1/4-inch primed Hardie lap Cedarmill siding with a 7-inch reveal. KV Construction paired that with Prime rustic Hardie 5/4×4 outside corners, window trim, and door trim. This is where a case study becomes more than a materials list: the profile, reveal, texture, trim depth, and finish all influence how the apartment complex reads from the street and how well the edges of each building are protected.

Details That Made This Project More Complete

Several project details shaped the final result: Old panel siding was completely removed and 7/16 OSB plywood was installed. These items matter because siding replacement often exposes the places where older exteriors were weakest: soffits, corners, window transitions, door openings, insulation gaps, or paint systems that no longer protect the apartment buildings well.

Outcome and Property Value

The finished project gives the Seattle apartment complex a more complete exterior system, with the visible siding, trim, soffit, window/door details, and hidden water-management layers all tied into one scope. The result is the kind of project KV Construction wants to be known for: practical, well-organized, and built around a full siding replacement mindset suited to Seattle and Pacific Northwest weather.

Project Specifications And Materials

Request a Free Siding Consultation

Talk with KV Construction about a full siding replacement, James Hardie exterior upgrade, or larger moisture-related siding project built for Pacific Northwest weather. KV Construction is owner-operated, uses consistent crews, follows disciplined flashing and QUAD MAX sealant standards, and backs its work with a 5-Year KV Workmanship Warranty. Request a free siding consultation to review your exterior, materials, waterproofing details, and project fit.