Milgard Ultra Series [new]
The core of the ' appeal is its "built-to-last" engineering. Unlike standard vinyl frames, fiberglass is impervious to water, insects, and salt air, making it a popular choice for coastal and mountain regions. Milgard Ultra Windows | C650 Fiberglass Series Online
| Pros | Cons | | :--- | :--- | | Extremely strong and rigid – will not warp | Higher cost than vinyl or standard fiberglass (~30–50% more than Style Line) | | Excellent thermal performance (low U-factor) | Limited dealer network (Western US primarily; less available in Midwest/East) | | Low maintenance – no painting required if colored | Heavier, may require two installers | | Wide color and finish options, including wood grain | Fewer trim/accessory options than wood or clad-wood | | Lifetime transferable warranty | Lead times longer (often 4–6 weeks+ due to custom build) | milgard ultra series
Note: DP 50 means the window withstands 50 psf of wind pressure – suitable for high-rise coastal or hurricane-prone zones. The core of the ' appeal is its "built-to-last" engineering
| Feature | Milgard Ultra | Marvin Essential (Fiberglass) | Pella Impervia (Fiberglass) | | :--- | :--- | :--- | :--- | | Frame Material | Fiberglass (pultruded) | Fiberglass (Ultrex®) | Fiberglass (Duracast®) | | Max DP Rating | DP 65 | DP 60 | DP 50 | | Interior Wood Grain | Yes (laminated) | Yes (paintable only) | Yes (integral color) | | Transferable Warranty | Yes (full lifetime) | Yes (limited transfer) | Yes (limited) | | Price Tier | Premium | Premium+ | Premium | | Feature | Milgard Ultra | Marvin Essential