AIR FROM THE SIDE
The sash swings out like a door, so it catches the breeze moving past the wall instead of waiting for it to come straight in.
The sash swings out like a door, so it catches the breeze moving past the wall instead of waiting for it to come straight in.
Turn the handle and the sash is drawn in against the weatherstrip along its whole length, then held there by the lock.
Nothing stays in the way when it swings — which is why a casement is usually the answer where an opening has to be climbed through.
100 · 400 · A-SERIES
Window District proudly designs and installs the Andersen 100 Series, 400 Series and A-Series. Start with the way you want your home to look, feel and perform—we’ll help you find the series that brings it together.
The three images above are Andersen’s own cutaways of each frame, showing how it is built rather than how it looks installed. They are Andersen’s artwork, not ours, and not a specification — sizes, finishes and hardware vary by series and configuration.
Built from Fibrex® composite, Andersen’s own material. Choose it when you want a frame you never have to paint, stain or seal — and a slim one, which on a casement is most of what you see.
Design yours with us What Fibrex® is, and how it compares →Time-tested craftsmanship and the warm character of wood on the inside, with a clad exterior facing the weather. Choose it when the room should feel like wood and the outside should look after itself.
Design yours with us What wood-clad means, and how it compares →Andersen’s Architectural Collection. Choose it when the window has to answer to the architecture — proportions, profiles and finishes shaped around the house you already have.
Design yours with us Wood inside, fiberglass outside — and how it compares →Drag the handle. What came out were double-hung sashes; what went in are casements. The opening did not change — what you can see through it, and how much of it actually opens, did.
Three second-floor windows on a New Jersey home, before and after replacement
One sash means one uninterrupted pane. There is no meeting rail cutting across the middle of the view, which is the line your eye had learned to ignore on the old windows — look at the slider and it disappears. What is left is the grille pattern, and that is a decision rather than a constraint: a colonial grid keeps the rhythm of an older facade, a contemporary pattern or clear glass opens it right up.
A double-hung can only ever open half of itself — the sashes slide past one another, so however far you push, half the opening stays covered. A casement swings clear on hinges, so the whole opening is open and the air comes through all of it. Swung out it also catches air moving along the wall rather than waiting for it to arrive head-on. And it works from a crank instead of a lift, which is the difference between reaching over a counter or a sink and heaving a sash up with both hands.
A wall does not have to keep the number of windows it was built with. This one had four, over the table where a family eats every day, looking onto the backyard. Nobody had asked whether four was right — only which four to buy again.
Three frames came out of the middle of the view. What replaced them is glass, so the garden reads as one thing rather than four.
A double-hung slides one sash past the other, so half of it is the most that ever opens. A casement swings the whole light clear. Two that open properly beat four that open halfway.
On this job, one triple casement came in under what replacing all four double-hungs would have. Fewer units, fewer frames, less to install.
None of that comes from the catalog. It comes from standing in the room, at the table, and asking what the family actually does there — which is the part of this we would rather be judged on.
One sash means fewer lines across the view than any window that has to slide past itself — so the choices you make about the few that remain are the ones people notice.
Contemporary, Colonial, Modified Prairie, Full Divided Light — or nothing at all, which on a casement leaves one uninterrupted pane.
The exterior that faces the street and the interior that faces the room do not have to match, and on most series they do not have to be chosen together.
Low-E glazing as standard, with laminated glass available where noise or security is the reason for the job.
The crank folds down out of the way of a blind or a shade when the window is shut, and comes in finishes chosen to sit with the frame rather than against it.
Pattern availability varies by series, size and configuration. Your designer will confirm what can be specified on the window you are choosing.
Casement windows crank open from the side, so the entire opening clears for ventilation and the glass stays unbroken by a center rail — ideal where you want a clean, modern line and a big view.
When closed, the sash presses tight against the frame, making casements one of the most weather-tight and energy-efficient styles available.
No deposit · No pressure
Book your free in-home consultation today. We'll measure, recommend, and quote — all with zero obligation.
No obligation. No high-pressure sales. Just expert design advice.
