Patio Door Replacement Types
Two- and Three-Panel Sliding Glass Doors
The sliding glass door is the patio door most houses have, and in Michigan plenty of people still call it a doorwall. HomeGuide notes most sliders have two panels, one fixed and one that slides, and wider walls can take three or four. A standard door is 72 by 80 inches, but sizes run from 30 to 96 inches wide and up to 96 inches tall, so an odd opening rarely forces a custom unit.
On a straight swap the new door fits the old rough opening. What separates a good slider from a cheap one is the rollers, the interlock where the panels meet and the sill. Our view: pay for steel or stainless rollers and a sill that drains water out. A slider gets opened every day, and a sill that holds water rots.
Multi-Slide (Stacking) Patio Doors
A multi-slide door, which HomeGuide calls a telescoping door, has two or more panels that all move. They slide past each other and stack at one end, or disappear into a pocket in the wall. A standard slider has one fixed panel, so it only ever opens half the width. HomeGuide's national installed range is $1,500 to $5,000. If you want it wider than the old door, the wall needs a new header sized for the span, and that's framing work before the door arrives.
Bifold and Folding Patio Doors
A bifold door folds like an accordion along a track, so the panels gather at one or both ends and leave nearly the whole opening clear. HomeGuide calls bifolds more expensive and less common, with the widest opening of any patio door, at $5,000 to $20,000 installed nationally. In a Michigan winter, check the sill and the weatherstrip where each pair of panels meets. A bifold has more joints than a slider, and each joint is a seal that has to hold.
Hinged Patio Doors
A hinged patio door swings on hinges like an entry door, as a single door or as a pair that meets in the middle. It needs floor space to swing, inside or out, and in return it closes against a full weatherstrip and looks traditional. French styles, in-swing and out-swing doors and pairs with sidelites are covered on french patio doors.
Patio Doors With Between-Glass Blinds
Some replacement doors come with blinds or pleated shades sealed inside the insulated glass, worked by a slide or knob on the frame. They stay clean and don't swing when the door moves. Compare the price against HomeGuide's national figure of $150 to $600 to fit large panel blinds on an ordinary door. Ask what happens if the blind mechanism fails, because the fix may mean a new glass unit.
New Sliding Screen Doors
A new screen panel rides its own track outside the slider. HomeGuide lists a screen door for a patio or sliding door at $130 to $550 nationally, and retractable screens roll aside when you don't want them. If the door is fine and only the old screen is torn or jumping its track, that's patio door repair rather than replacement.
Why Troy homeowners call Troy Windows
- Free in-home measure of every opening
- Written, itemized quote before any work
- Frames and sills checked before a price
- One local window installer, not a call list
- No charge to homeowners for the referral
Patio Door Replacement Cost in Troy
HomeGuide's national figures put patio door replacement at $700 to $6,500, including the new door, labor and removal of the old one. Labor alone runs $200 to $1,000, and taking out and disposing of the old door adds $100 to $500.
| Patio door type | National installed range (HomeGuide) |
|---|---|
| Sliding glass door | $1,200 to $4,000 |
| Exterior French doors | $1,300 to $5,500 |
| Multi-slide (telescoping) | $1,500 to $5,000 |
| Bifold | $5,000 to $20,000 |
Frame material
For the door alone, HomeGuide lists vinyl at $400 to $1,200, aluminum $600 to $2,500, fiberglass $800 to $3,500 and wood $1,000 to $5,000.Panels and width
Three- and four-panel doors cost more than two.New framing
Widening the opening adds $150 to $250 or more for framing, plus siding and drywall work.
Choosing a Replacement Patio Door for a Troy Home
Safety Glass Is Required
Every pane in a patio door has to be safety glazing, and new doors come that way. The part a quote can miss is the glass beside the door: a sidelite or a low window close to the opening may need it too. The tempered glass windows page gives the distances, so make sure the quote covers that glass.
Read the Door's Energy Label
ENERGY STAR sets separate criteria for doors, graded by how much glass they have. By its account, even a glass-heavy sliding door has a lower glass-to-frame ratio than a window, so doors aren't judged on the window scale. Compare doors on their NFRC ratings and ask for the U-factor in writing.
Lead-Safe Removal in Older Homes
Taking out a door frame disturbs painted trim, and in a house built before 1978 that makes it a job for an EPA-certified firm. Ask for the firm's RRP certificate; the lead-safe window replacement page describes the containment and cleanup.
What Replacement Day Looks Like
HomeGuide puts a patio door replacement at 3 to 6 hours, including removing the old door and repairing what's found underneath, and up to a full day for big doors or a damaged wall. What can turn up under an old sill is subfloor softened by years of water getting past it. Ask the installer to say in the quote how they price that if they find it, so it isn't a negotiation with the old door already out. Clear about six feet of floor inside the opening, take down curtains and rods, and keep pets shut away, because for a few hours there's no door in that wall. If a deck or patio sits right outside, check that the new sill height still clears it so water runs away from the house.