Sliding Glass Door Replacement & Installation in Portland, OR
Replace Drafty, Leaking, or Hard-to-Operate Sliding Doors. Milgard, Andersen, Pella & All Major Brands. Patio Doors, French Doors & Multi-Slide Doors. Proper Sill Pan, Head Flashing, and Air Sealing on Every Installation. Licensed OR #241979.
Most Portland homeowners replacing a sliding glass door are dealing with one of three problems: a door that is difficult to slide due to worn rollers or a damaged track, a door that leaks water at the sill or frame, or a door that drafts because the original installation never included proper air sealing. All three are problems we fix every week across the Portland metro.
Sliding and patio doors are among the largest openings in any home exterior wall. A door installed without a sill pan, without head flashing, or without proper air sealing is a significant ongoing liability in Portland's wet climate. We have repaired the structural damage behind improperly installed patio doors too many times to cut corners on our own installations.
Sill Pan on Every Installation
The most commonly skipped step in budget slider installs
Head Flashing Always Included
Directs wall water away from door opening
Licensed & Insured
OR OR #241979 | WA #VRESHCL776ND
EPA Lead-Safe Certified
Required for pre-1978 Portland homes
5–10 Year Workmanship Warranty
On all door replacement work
Available 24/7
Storm-damaged door calls prioritized
(503) 272-6436 — Call or Text, Available 24/7
We answer calls and texts at any hour. For storm damage, active leaks, or structural emergencies, calling directly is the fastest path to a response.
Why Sliding Door Installation Quality Matters in Portland
The Sill Pan Problem
A sill pan is a formed tray at the base of the door rough opening that collects water that enters past the threshold and directs it to the exterior. Without a sill pan, water sits in the rough opening, soaks into the sill plate and subfloor framing, and begins a rot cycle that typically goes undetected for years. By the time a homeowner notices a soft floor adjacent to the patio door, the framing damage is often significant. Every VResh slider installation includes a proper sill pan — not just a bead of caulk at the threshold.
The Head Flashing Problem
Head flashing above a patio door opening directs water running down the wall surface away from the top of the rough opening. Without it, water infiltrates from above and saturates the header and jambs over time. This is one of the most common moisture-damage scenarios we encounter when removing old patio doors. Every VResh installation includes head flashing integrated into the wall drainage plane.
The Air Sealing Problem
Drafts from a sliding door are rarely from a defective door panel — they are almost always from inadequate air sealing in the gap between the door frame and the rough framing. Properly filling this gap with low-expansion foam before the interior trim is installed reduces infiltration dramatically. We include this on every installation as standard.
Patio Door Types We Replace and Install
Sliding Glass Doors (Sliders)
The most common patio door type in Portland-area homes. One panel slides horizontally behind the other. Available in 2-, 3-, and 4-panel configurations.
We install Milgard, Andersen, Pella, Jeld-Wen, and other brands. Milgard sliding door systems are popular in Portland for clean hardware and a strong Pacific Northwest track record.
Standard installation uses low-E double-pane glass with argon fill. Triple-pane available for maximum thermal performance.
Multi-Slide and Lift-and-Slide Doors
Premium large-opening systems — 3 to 6 panels that slide and stack. Available from Marvin, Andersen, Milgard Moving Glass Wall, and others.
Require a structurally engineered header and careful sill flashing across a wide opening. Typically require permits and structural engineering review.
Popular in Portland higher-end renovation projects targeting indoor-outdoor living.
French Patio Doors
Two hinged panels — both operable or one fixed and one operable. Provide traditional architectural character and a wider, clear opening.
Require careful attention to the center meeting stile where the panels meet when closed — a frequent water entry point on budget French door installations.
Popular on Portland Craftsman homes and traditional residential styles.
Bi-Fold Patio Doors
Multiple panels that fold and stack to one or both sides. Common in covered patio and sunroom applications.
More panel joints than a slider — each joint is a potential air and water infiltration point in Portland's climate. Proper sealing of all panel-to-panel joints is important.
Our Sliding Door Replacement Process
Patio Door Brands We Install
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Milgard sliding doors and Moving Glass Wall systems are the most commonly installed patio door products in the Portland metro. Tuscany and Trinsic vinyl series provide strong performance and a Milgard Full Lifetime Warranty.
VResh Construction is a Milgard Warranty Service Provider — authorized to perform warranty service on Milgard sliding door systems.
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Andersen 200 Series (Fibrex composite) and 400 Series (wood interior/Fibrex exterior) offer premium performance in French door and multi-slide configurations. Popular in Portland higher-end and historic homes.
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We install all major patio door brands. If you have already selected a product, we install it. If you are still deciding, we can advise on the right product for your home and budget.
Client's Talk
We have a wealth of experience working as main building contractors on all kinds of projects, big and small, from home maintenance and improvements to extensions, refurbishments and new builds.
Serving Portland Metro Area
VResh Construction provides window replacement, siding installation, roofing, dry rot repair and full exterior renovation services throughout the Portland metro area and Southwest Washington.