Why Casements Win for Egress
A casement window is hinged on the side and cranks open like a door — the entire window becomes the escape opening. That is the whole advantage: where a slider needs to be twice as wide to give the same opening, a casement gives it to you in a smaller, cheaper wall cut. For most Fairfax County basements, the casement is the smallest window that passes code, which makes it the least cutting, the lowest cost, and the easiest inspection.
How Much Window You Actually Need
Because the full casement opens, a window in the range of 32 inches wide by 48 inches tall typically clears the 5.7-square-foot, 20-inch, and 24-inch minimums with room to spare — though your exact size depends on the hardware and the well. Compare that to a slider, which would need to be nearly twice as wide for the same opening. Smaller cut, smaller well, smaller bill. Our casement vs. slider guide lays out the math.
The Tradeoffs, Honestly
Casements have crank hardware, and hardware is a wear item — it needs occasional use and eventual service, which is one more reason to open the window on your annual maintenance check. The sash also swings outward into the well, so the well must be deep enough to clear the swing — we account for that when we size the well. Neither is a dealbreaker; both are worth knowing.
What We Install
We set casement windows with serviceable crank hardware, full weatherstripping, and screens that pop out from the inside — because a screen that cannot be removed quickly is an obstruction, not a feature. At handoff we crank it open with you, show you the release, and make sure the swing clears the well with room to spare.
How It Works: Our Process
Step 1 — Free visit. We measure the wall, the grade, and the well space, and confirm a casement gives you the code opening with the smallest cut.
Step 2 — Written estimate and permit. Window, cut, well, drainage, cover — itemized. We handle the Fairfax County permit.
Step 3 — Cut and set. The opening is cut to the casement's size, and the window is set square, level, and sealed.
Step 4 — Well and swing check. The well is built with the sash swing accounted for, so the window opens fully without touching the well walls.
Step 5 — Handoff. You crank the window open yourself, pop the screen out from inside, and lift the cover from the well. Everything gets tested in front of you.
Sizing the Casement to Code
Because the whole casement opens, the math is friendly: a window around 32 inches wide by 48 inches tall typically delivers the 5.7 square feet of clear opening with the 20-inch width and 24-inch height to spare. But "typically" is not a measurement — the exact clear opening depends on the frame profile and the hardware, so we verify the numbers for the specific window going in your wall. That verification is part of the estimate, not a surprise at inspection. Our size guide explains why clear opening is the number that counts.
Screens That Do Not Block Escape
Every operable window gets a screen, and on an egress window the screen must come out fast from the inside — no tools, no wrestling. We fit screens that pop out with a simple pull, and we show you the motion at handoff. Then we tell you to practice it once a year, because a screen you have never removed is a screen you will fumble in the dark. It takes ten seconds to learn and ten seconds to do.
Hardware Care in Two Minutes a Year
The crank operator is the one wear item on a casement. Once a year, crank the window fully open and closed, wipe the track clean, and put a drop of silicone lubricant on the moving parts — not oil, which attracts grit. That is the entire maintenance program. A crank that gets used stays smooth for years; a crank that sits untouched for a decade is the one that strips when you need it most. Every project is different — contact us for a free written estimate.
Casements and Home Security
A common question: is a casement window that cranks fully open a security risk? In practice, no more than any operable window. The crank hardware includes a locking mechanism that engages when the window closes — it cannot be opened from outside without breaking the glass, which is true of every window in your home. For basement windows specifically, the well cover adds a layer of protection against casual intruders while still lifting easily from inside. Security and egress are not opposites here; the window locks like a window and opens like an exit.
Call (301) 679-9193 or send the form for a free written estimate.