Fiberglass patio doors for strength and year-round comfort, as sliders or French swinging doors.
The C700 Ultra Series (formerly C650) is Milgard's fiberglass patio door. Fiberglass is one of the strongest frame materials there is, so it stands up to weather and everyday wear, and it holds dark colors well. It comes as a slider or as French doors that swing in or out.
Fiberglass frames also insulate well, which keeps the room by the door comfortable in a cold snap or a heat wave. Like all Milgard doors, Ultra is backed by Milgard's Full Lifetime Warranty, and we handle the measuring, ordering, tear-out and installation.
Request Your Free EstimateStrength, efficiency and color that lasts — here is what sets Milgard's fiberglass patio door apart.
Fiberglass handles both rough weather and daily wear, so the door keeps operating smoothly and sealing tightly for years.
Fiberglass frames are prized in places with extreme weather because they insulate so well. Pair them with Low-E glass for a door that keeps the room comfortable.
White, Black, Bronze, Bark, Adobe and Steel Gray are offered on both the inside and the outside, so a black door can be black on both faces.
Ultra comes as a slider and as hinged French doors, so you can match the rest of the house whichever you pick.
A fiberglass slider that needs no swing room. A strong pick for wide openings, decks and covered patios.
Hinged French doors in in-swing or out-swing versions. Out-swing keeps the panels out of the room; in-swing is the traditional choice.
Six colors, each offered for both the exterior and the interior.
Swatches are approximate. We bring real color samples to your free in-home estimate.
Tap any photo to see it full size.
Our own crews remove your old door, install the new Ultra slider or French door, and seal it for Puget Sound weather. Milgard's Full Lifetime Warranty covers the door, and our 5-year workmanship warranty covers the install.
Get a Free QuoteTell us about your project and a local expert will reach out — usually within 24 hours — with honest guidance and clear pricing.