Patio Door Replacement

An aging sliding patio door removed and replaced with a new sliding glass door — protected interior, prepared opening, and new trim inside and out.

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Published August 22, 2026 · Portland metro, Oregon

The existing sliding patio door was showing its age and no longer gave the homeowner the clean appearance or the smooth operation they wanted. The older frame and the trim around it had worn from years of exposure, so the door was handled as a complete replacement rather than a repair.

Before any demolition began, we reviewed the opening and the surrounding siding so the replacement could be planned without unnecessary disturbance to the exterior. The goal was to set a new door while keeping the wall framing, the siding and the interior finishes protected.

New sliding patio door with new exterior trim installed on a Portland home — New exterior trim closes the opening back to the existing siding, ready for sealing and final paint.

Before

The original unit sat in a large exterior opening, with the frame and trim worn from years of weather. We evaluated how the old assembly was attached and how the new door would fit the opening, which keeps surprises out of the demolition and limits damage to the surrounding siding and wall framing.

Existing patio door and exterior trim seen along the siding before removal — The existing unit and exterior trim, reviewed before demolition began.

Protecting the room and removing the old door

Before anything came out, the interior was closed off from dust and debris with plastic sheeting and tape. That matters more than usual on a job like this, because a large exterior opening stays open while the work is under way. The old door and frame were then removed completely to expose the rough opening, and loose material and old sealant were cleared away so the sill, jambs and header could be inspected and the new unit could sit against a clean, prepared surface.

Plastic sheeting taped across the door opening to protect the room during the work — Plastic sheeting and tape separated the room from the open exterior wall.

Rough opening exposed after the old patio door and frame were removed — The old door and frame out, and the rough opening exposed for inspection.

Setting the new door

With the opening prepared, the new sliding glass door was staged and checked against it before anything was fastened. The frame was positioned, leveled, squared and secured to the structure, then the sliding panel and the lock were operated and adjusted before any finish work started. Getting the alignment right at this stage is what lets the panel slide correctly and the hardware latch as intended.

New sliding glass patio door staged outside the prepared opening — The replacement unit staged and checked against the opening before fastening.

New sliding patio door set, leveled and squared in the opening — The new door set in place, leveled, squared and secured to the structure.

Trim inside and out

New exterior trim was installed around the door to finish the opening and create a clean transition to the existing siding, with the joints and edges prepared for sealing and final paint. Inside, new trim covered the installation gap and tied the door back to the existing walls and hardwood floor. The door was operated again after the finish work to confirm nothing interfered with the sliding panel.

New patio door seen from inside the room with the jamb ready for interior trim — Inside the home, the new frame set in the opening with the jamb ready for trim.

Completed sliding patio door with new interior trim above a hardwood floor — The completed door — new interior trim, smooth operation and a clear view to the backyard.

Finished result

The homeowner has a new sliding patio door that looks cleaner and operates smoothly, with a new frame, glass, trim and perimeter sealing making the opening more weather-resistant than it was. The work was completed while preserving the surrounding siding and interior finishes as much as possible, and the large glass area brings plenty of natural light into the room.

Planning a patio door or window replacement in the Portland or Salem metro? Request a free written estimate from a licensed Oregon contractor.