Picture Windows in Portland, OR

The big-glass catch most installers never mention

A picture window is usually the largest single pane in the house, and large glass has a failure mode small windows almost never see: a thermal stress crack. It starts on its own, with no impact, when one part of the pane heats up fast in the sun while another part sits in shade. The two zones expand by different amounts and the glass cracks, usually a clean line that runs from an edge. Panes over roughly 15 square feet are the ones at real risk, and a Low-E coating adds to it because the coating absorbs more heat.

This matters more here than people think, because a big Portland view window often sits partly shaded by an eave, a porch, a fir tree or the house next door, and our sunny-then-cold swings load the glass. So on a large picture window we build it to handle it:

• Stronger glass where the size calls for it. On a large or partly shaded picture window we spec heat-strengthened or tempered glass, which stands up to the heat difference far better than plain annealed glass.
• Clean, undamaged edges. A chipped or rough-cut edge is where a thermal crack starts, so the glass is handled and set so the edges stay sound.
• A word about blinds and film. Blinds or a dark film pressed right against the inside of a big Low-E window can trap heat and raise the stress, so we will tell you how to shade it without cooking the glass.

None of this is a reason to skip a picture window. It is the reason to have one sized and glazed by someone who installs them all the time, instead of finding out the hard way a year later.

The Milgard picture windows we install

We install Milgard windows, and Milgard builds picture windows across its lines, so you can match the frame to the size of the opening and your budget:

• Vinyl, in the V250 Style Line, V300 Trinsic and V400 Tuscany series. The value choice for most openings, with the narrow Trinsic frame a favorite when you want the most glass and the least frame.
• C700 fiberglass. The stronger frame for a large span, where you want a slim sightline to hold its shape behind a heavy pane for decades.

On a wide opening, fiberglass lets the frame stay slim without flexing, and we will tell you when the size actually calls for it rather than push the pricier frame. Your written quote lists the exact Milgard series, the glass package and the unit size, so you can set it next to any other bid and compare it line by line. The two frame materials are laid out on our vinyl windows in Portland and fiberglass windows in Portland pages, and the full range is on our Milgard windows in Portland page.

The honest trade-offs of a picture window

A picture window is the right call in a lot of rooms, but not every one. Here is what to weigh:

• No air and no exit. It does not open, so it cannot ventilate a room or serve as a bedroom escape window. Plan an operable window alongside it.
• The outside is harder to clean. You cannot tilt it in, so the exterior of a tall picture window takes a ladder or a pole, or a once-a-year wash.
• Big cold glass can sweat. A large pane is the coldest surface in the room on a January morning, so in a humid house it is where condensation shows up first. A good Low-E build and some airflow handle it.
• Size has a cost. A large pane, stronger glass where it is needed, and careful setting all add up. The view and the light are what you get back.

How we install your picture windows, and the warranty

The old window comes out first and leaves with us the same day. A picture window is a single heavy pane, so it has to be set dead square and fully supported, or the frame can rack and stress the glass over time. We set it level, shim it so the weight is carried right, and flash and seal the opening against Northwest rain before trimming both sides. Where the size or the location calls for it, the glass is heat-strengthened or tempered, and any pane beside a door, low to the floor, or next to a tub or stairs is tempered to code. We work one opening at a time, so your home is never left open to the weather.

A qualifying Milgard install comes with a Limited Lifetime Warranty on the window, and our own workmanship warranty is in writing and handed to you before we start. Our warranty page spells out the coverage. The same careful big-glass setting carries over from Exteriors Design, the company behind Gorilla Works, whose crews install large storefront and curtain-wall glass on commercial buildings, and we install picture windows across the river too, on our window replacement in Vancouver, WA page.