Patio Door & French Door Installation in Portland, OR
Hinged French Doors. Multi-Panel Folding Doors. Patio Door Replacement. Proper Flashing at Every Installation — Not Just a Door in a Hole. Licensed OR #241979.
Patio and French doors are one of the most common sources of water damage in Pacific Northwest homes. A door improperly flashed at the head, without a sill pan at the base, or with a failed threshold seal, allows water to enter the wall cavity and saturate the subfloor framing below the opening. VResh Construction installs all patio and French door types with the same moisture management discipline we apply to window installations — proper drainage plane integration, a sill pan at the base, head flashing above, and complete weatherstripping and threshold sealing.
All Patio Door Types
French, folding, and sliding — all brands installed
Licensed & Insured
OR #241979 | WA #VRESHCL776ND
5–10 Year Workmanship Warranty
On all door installation work
Proper Flashing Always
Head flash, sill pan, drainage plane on every installation
EPA Lead-Safe Certified
Pre-1978 homes handled with full RRP compliance
Available 24/7
Emergency response for storm-damaged doors
Patio and French Door Types We Install
Hinged French Doors
French doors — two outward or inward-swinging hinged doors with divided lights or full-glass panels — add significant visual character to a home's indoor-outdoor transition. They provide a wider, clearer opening than standard sliding doors for furniture movement and are preferred for their traditional aesthetic.
French doors are more complex to weatherstrip than sliding doors due to the center meeting stile — the vertical member where the two doors meet. Proper installation includes multi-point locking hardware and astragal seals at the meeting stile to prevent air and water infiltration at the center.
Common brands: Milgard, Marvin, Andersen, Jeld-Wen, Therma-Tru. We install all major brands and recommend products based on the homeowner's budget, aesthetic preferences, and energy-efficiency priorities.
Multi-Panel Folding / Bifold Patio Doors
Multi-panel folding doors — sometimes called NanaWall or accordion doors — consist of 3–8 panels that fold and stack to one or both sides, creating a wide opening that effectively merges indoor and outdoor living spaces.
These doors require a structurally engineered header above the opening to carry the load previously carried by the wall framing being removed. We coordinate structural header sizing with the door manufacturer's requirements and obtain all required permits.
Folding door systems are a premium product with premium installation requirements. They are most common in high-end Portland renovations where indoor-outdoor integration is a design priority.
Patio Door Replacement (Existing Opening)
Replacing an existing patio door in the same rough opening is a common project that typically does not require structural work — but does require thorough inspection of the existing rough opening, threshold, and surrounding framing for moisture damage before the new door is installed.
We remove the existing door, inspect the rough opening and subfloor framing below the threshold (a common rot location), make any necessary repairs, and install the new door with proper sill pan flashing, head flashing, and weatherstripping.
For older sliding glass doors being replaced with new French or folding systems: rough opening modifications may be required. We assess the structural implications and permit requirements at the estimate stage.
(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.
Our Patio Door Installation Process
Patio Door Brands We Install in Portland
Milgard — Most Common in Portland
Milgard's Tuscany and Trinsic series French doors and patio door systems are the most commonly installed patio door products in the Portland metro. Full Lifetime Warranty for the original purchaser. VResh is a Milgard Warranty Service Provider.
Milgard also manufactures Moving Glass Wall sliding systems — multi-panel configurations for larger openings.
Andersen — Premium and Wood Interior Options
Andersen 200 Series (Fibrex composite) and 400 Series (wood interior, Fibrex exterior) French and hinged patio doors. Premium option for homes where wood interior character is important.
Andersen E-Series provides the highest level of customization — any size, any divided light configuration.
Marvin — Premium Wood and Fiberglass
Marvin Elevate (Ultrex fiberglass exterior, real wood interior) and Ultimate (full wood or custom) French doors. The right choice for Portland historic homes, where matching original door character is important.
Marvin doors can be specified with exact divided light configurations to match the original Portland bungalow or four-square door profiles.
Therma-Tru and Other Brands
For fiberglass French doors, Therma-Tru has a strong Pacific Northwest track record — moisture-resistant, dimensionally stable, and available in realistic wood-grain textures.
We install all major patio door brands. If you have already selected a product, we install it. If you are still choosing, we advise.
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.