Roofing & Exterior
The Wall of Glass That Has to Glide, Lock, and Keep the Rain Out
Sliding patio doors — from standard two-panel units to wide multi-panel systems — replaced for smooth operation, security, and the water management that a big low threshold demands. Rollers, tracks, glass, and flashing all specced for how they'll actually be used.
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Signs to watch
Is this you?
A slider that fights you to open
Dragging, grinding, or lifting to move a panel means worn rollers or a damaged track. A patio door should glide with one hand — anything harder is wearing out fast.
Water pooling or staining at the track
A low, wide threshold is the hardest spot on the house to keep dry, and a slider's track is a classic Northwest leak point. Water at the sill means it's getting behind the frame.
A latch that no longer feels secure
A single worn latch on a big glass panel is both a comfort and a security problem. Multi-point hardware and an anti-lift track close that gap.
Cold, foggy, or drafty glass
A big single- or failed-double-pane slider is a wall-sized heat leak. Fogging between panes means the seal is gone, and the draft off it is the room's coldest spot.
Your options
Rollers, track, glass, and hardware — specced for how the door actually lives
Quality tandem rollers and a durable track so the door glides for years, not months. Frames in vinyl, fiberglass, or aluminum-clad, chosen for the climate and the span. Energy glass packages — Low-E coatings tuned for our heating-dominated weather, argon fill, and laminated glass where noise or security matters. Multi-point locking and anti-lift detailing so a big panel can't be jimmied or lifted off its track. And under the whole thing, the water management a low threshold demands: a proper sill pan, flashing, and sealing so the track sheds water instead of collecting it. For a bigger opening, three- and four-panel and stacking configurations open the wall to the patio while keeping all of the above intact.
The method
How we do it
- 01
Measure and spec
Opening measured, threshold and floor checked, panel count and glass confirmed, and the door ordered to fit — no forcing an off-size unit into the rough opening.
- 02
Set, sill-pan, flash, and seal
Old unit out, opening inspected for rot, new door set plumb and level, sill-panned and flashed at the threshold, insulated and sealed around the frame — the low sill is where a slider is won or lost.
- 03
Glide-and-lock walkthrough
We glide every panel, throw the lock, and check the seal with you before we sign off. It should move with one hand, latch clean, and seal tight against the weather.
Straight numbers
Sliding-door pricing, quoted straight
A standard two-panel slider sits well below a wide three- or four-panel or stacking system — more glass, bigger frame, more hardware. What moves the number: panel count and overall size, frame material, glass package, locking hardware, and whether we find rot at the threshold once the old door is out. Fixed bids in writing, with any rot flagged up front so it isn't a surprise mid-install.
Where we do this work
Sliding Patio Doors: straight answers
My slider is hard to open — repair or replace?
Sometimes it's just worn rollers or a dirty track, and that's a repair. But if the track is bent, the frame is racked, or the glass is fogged, you're throwing good money at a tired unit. And if there's staining at the sill, the flashing or sill pan may already have failed — that's a replacement done right, not another roller kit over a hidden leak. We'll open it up and tell you honestly which it is.
Are sliding doors secure?
A quality slider with multi-point locking and anti-lift detailing is hard to force and can't be popped off its track — that's the whole point of specifying the hardware, not just the glass. The old reputation comes from single-latch doors with a lift-out panel; modern units with proper locks and a laminated-glass option close that gap.
Why do sliding doors leak at the bottom, and can that be prevented?
Because the threshold sits low and wide right where wind-driven rain collects, and the track will pond water if it isn't drained and flashed. Prevented is exactly the word: a proper sill pan under the door, correct flashing, and a track that sheds water keep it dry. Most leaking sliders we see were set without that detailing — which is the part we won't skip.
Can I replace a standard slider with a wider multi-panel door?
Often, yes — but going from two panels to three or four, or to a stacking configuration, usually means enlarging the opening, which is structural framing work and may need a header. We'll assess the wall, tell you what widening involves, and keep the rollers, locking, and flashing to the same standard on the bigger opening.
Get the sliding patio doors conversation started.
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