Window Replacement in New Castle County, DE and Chester County, PA

Insert or full-frame replacement

An insert replacement, sometimes called a pocket window, fits a new window inside the existing frame. The old sashes and stops come out, the old frame stays, and the new unit sits inside it. It is faster, it leaves the interior and exterior trim alone, and it costs less. It is the right choice when the existing frame is square, dry and solid, which describes a lot of the wood and vinyl windows in northern Delaware homes.

A full-frame replacement takes the whole window out down to the rough opening and installs a new window with its own nailing fin or frame, flashed to the wall. It costs more and disturbs the trim, but it is the only honest fix when the old frame is rotted, when the old window has been leaking into the wall, when the size or shape of the opening is changing, or when a bedroom window needs to grow. It also lets the installer see and fix whatever the old window let in.

Replacing a window with the same size in the same opening usually needs no permit. Enlarging an opening, adding one or cutting a new header does, because it touches the structure, and historic districts can add a review of style and material.

Styles, room by room

Double-hung windows, with two sashes that slide up and down, are the standard on colonials and most traditional homes around Newark and Middletown, and modern ones tilt in for cleaning. Casements hinge on one side and crank open, seal tighter because the sash presses into the frame, and are the practical choice over a kitchen sink or anywhere you cannot reach up to lift a sash.

Sliders are common in the 1970s and '80s houses of Pike Creek and suit wide, short openings. Awning windows hinge at the top and can stay open in the rain, which makes them useful in bathrooms and basements. Picture windows do not open and give you the most glass. A bay or bow window projects from the wall and adds a shelf and a little floor space, but it needs its own small roof and support.

Glass and the two numbers on the label

The glass does most of the work. A low-emissivity coating reflects heat back into the house in winter and keeps solar heat out in summer. Argon between the panes slows heat transfer better than air. A warm-edge spacer cuts the cold line you feel at the edge of an old window.

Two numbers on the label tell you how a window performs: the U-factor, where lower means less heat escapes, and the solar heat gain coefficient, where lower means less summer heat comes in. Windows with the ENERGY STAR mark for the climate zone that covers Delaware meet a tested threshold on both. Any window quoted for your house should come with those ratings, compared unit to unit.

How the opening is flashed

Water gets in around windows, not through them, and the wall behind a leaking window can rot for years before anything shows inside. A full-frame installation starts with a sloped sill pan or a flexible flashing membrane across the bottom of the opening, turned up at the sides, so water that reaches the sill drains out rather than in. The window goes in on top of it. Flashing tape then goes on the sides and last across the top, lapped like shingles so every layer sheds onto the one below.

The house wrap is cut and folded to integrate with that flashing, and its top flap is taped down over the head flashing, never under it. Outside, the joint between window and siding gets a backer rod and sealant with a gap left at the bottom so water can escape. Inside, the gap between window and framing is filled with low-expansion foam and sealed at the drywall. For an insert the old frame stays, but the principle holds: seal the perimeter, leave the bottom able to drain, and cap the outside so the old wood never sees water again.

Windows in northern Delaware houses

The 1970s and '80s houses of Pike Creek and the neighborhoods around Newark often still have their original aluminum sliders and single-pane double-hungs. They sweat in winter, the tracks are worn, and the frames are cold to the touch. Full-frame replacement is usually the answer there, because the old frames have no thermal break and often no flashing at all.

Older homes near Main Street in Newark and Middletown may have wood double-hungs with weights and ropes. Some are worth restoring; most are past it, and a clad-wood or fiberglass full-frame unit keeps the look while ending the drafts. The 2000s developments around Middletown have builder-grade vinyl windows now old enough for failed seals, and inserts in those sound frames are often the sensible fix. If siding is due as well, do the two together, so every window is flashed into the wall once while the siding is off.

One installer from the sill pan to the casing

A window is only as good as the flashing around it, and flashing is where a window installer and a siding installer point at each other. Here the same company flashes the opening, caps or trims the outside and finishes the inside, so nothing falls in the gap. The estimate names the unit going into each opening and says which openings need full-frame work and why.