At Marvin, we don't use words like "ultimate" lightly. So you know if we were willing to name any of our products with such a superlative, they must be something special.

Top-of-the-line, state-of-the-art, awe-inspiring. Open and close this door just once, and you'll feel the solid construction that makes this the best door in the industry. Our secret lies in the core: Ultrex - the very same material we use to create our rugged door sills - is a rigid, warp-free backbone in your locking stile. Moisture, pressure, heat and cold don't affect Ultrex, so this core makes the Ultimate French Door incredibly stable and reliable. In fact, this door passes the DP40 rating established by the Window and Door Manufacturers Association (WDMA). No wonder people feel so strongly about it.