Sliding or hinged: picking the type
A sliding patio door has one fixed panel and one that rolls along a track. It needs no floor space to open, which is why it's the usual choice onto a deck or a tight patio. A hinged (French-style) patio door swings open on hinges, either one panel or both. With both open you get the full width of the opening, but you need clear room for the panels to swing.
Most replacements keep the same type and size, which keeps the job simple. Switching from sliding to hinged, or the reverse, is often possible in the same opening.
What patio door replacement involves
This is a full unit replacement, not a roller or track repair. We measure the opening and check the sill and subfloor for rot, since water collects at a door threshold more than anywhere else on the wall. On install day:
- The old door comes out, frame and all
- Any soft subfloor or framing is repaired, and the sill gets flashing so water drains out instead of in
- The new unit goes in level and plumb, so it slides or swings without binding
- Gaps are insulated, the outside is sealed, and trim is finished inside and out
- Rollers, hinges and locks are adjusted before we leave
Signs it's time to replace the door
- It drags or jumps the track even after the track is cleaned
- You can see daylight or feel a draft around the panels
- Water shows up on the floor inside after a storm
- Fog or haze between the panes
- Soft or cracked wood at the frame or sill
- The lock doesn't catch, or the door won't close without a shove
Why patio doors wear out
A patio door panel is a big, heavy piece of glass that gets opened and closed thousands of times. Rollers and tracks wear, hinges sag, and weatherstripping flattens. The sill takes the most punishment: rain, snowmelt and foot traffic all land there. Add the slow settling every house does, and the frame drifts out of square until the door binds or stops sealing.
Frame, glass and hardware choices
Vinyl frames are the most common and the most affordable. Fiberglass and wood with an aluminum-clad exterior cost more and offer slimmer frames or a painted look. Door glass is always tempered safety glass, and low-E coatings help with heat in summer and cold in winter. Options include blinds sealed between the panes, so there's nothing to dust or tangle, and multi-point locks on hinged doors.
What affects the price of a new patio door
- Sliding or hinged, and how wide the opening is
- Frame material and exterior color
- Glass options and between-the-glass blinds
- Rot repair at the sill or subfloor
- Interior and exterior trim
- Changing the size of the opening, which means framing work
See the cost page for how a quote is put together.