8-Foot Patio Door Replacement
The wide slider off the dining room or walkout is two big panels and a lot of glass.
Reply within one business day. Or call / text 763-250-3621.
8 foot patio door replacement is a two-panel slider eight feet wide replaced in the opening it came out of: each panel is four feet wide and heavy, so two people set the frame. JMB Builders supplies and installs it across the Twin Cities metro, priced per door, frame and screen included. Eight-foot doors are usually custom ordered, lead time on the quote. One door is a welcome job. Photo reply within one business day, or a free in-home estimate.
- Eight-foot two-panel slider, same opening
- Priced per door, frame and screen included
- Usually custom ordered; lead time on the quote
Patio doors come in two common widths, six feet and eight feet. The eight-foot door is the one on walkout ramblers, dining rooms and family-room additions where the builder wanted more glass. Each panel is about four feet wide, the fixed panel and the sliding panel together weigh what a small window crew can lift, and the sill runs the full width with one more foot of span where water can get under it.
Replacing one is the same job as a six-foot door with the scale turned up. The old panels come out first, the frame is cut free, the subfloor and rim along the full sill are checked and rebuilt where soft, and a full-length sill pan goes down. The new frame is set level and plumb by two people, the heavy panels are hung and adjusted, the screen fitted and the lock set. Inside and out it is trimmed, primed and caulked; painting is quoted as a separate line.
An eight-foot slider is usually custom ordered, because the shelf item at our supplier is the six-foot white door. Custom ordered means built to your opening in the color, glass and grid pattern you pick, with the lead time written on the quote. A wide door is also where triple-pane or a stiffer fiberglass frame is worth asking about, since the panels are big and the glass is most of the wall.
Get a written quote for this job
Three photos and a sentence is enough: a reply within one business day, or ask for a free in-home estimate. Or text the photos to 763-250-3621.
What you supply
- Photos of the patio door from inside and outside, and a close-up of the sill and the floor in front of it
- A rough width of the frame outside edge to outside edge so we can confirm it is an eight-foot door
- Your pick of frame color, glass, grids and which side slides
- Clear floor space inside the door on install day; the panels are large
What JMB supplies
- A measure of the opening and a check of the header above it before the order
- The eight-foot patio door with frame and screen, custom ordered through ABC Supply
- Removal of the old panels, frame and trim with haul-away
- Repair of rotted subfloor, rim or framing along the sill, quoted as its own line
- Full-length sill pan, flashing tape, foam, sealant and shims
- Two people to set the frame and hang the panels
- Exterior trim or capping and interior casing, primed and caulked; painting quoted as a separate line
- Panel rollers, screen and lock adjusted so it rolls and latches
- Photos of the finished door in your job folder
How it is priced: per door
Quoted in writing from your photos, with a reply within one business day. What moves the number:
- Frame material: vinyl, fiberglass or wood-clad, and the glass package on four-foot panels
- Color, grids and blinds between the glass on the custom order
- Rot in the subfloor, rim or framing along an eight-foot sill
- What the door opens onto: deck, patio or grade
- Siding, stucco or brick around a wide opening
- Interior casing kept, matched or replaced
Send the frame width with your photos. An eight-foot door is custom ordered, and the lead time on the quote depends on the frame material and glass you pick.
How long it takes
About a day on site for an eight-foot slider in a sound opening, more if the subfloor along the sill is rotted. The door is usually custom ordered and that lead time is written on the quote.
How your project works
- 1
Send photos, get a written quote
Send three photos of the space and a sentence about what you want. You get a clear, itemized reply within one business day. Prefer a look in person? A free in-home estimate is always an option.
- 2
Pick materials, or bring your own
We help you choose profiles and materials that fit the house and the budget, or match your existing millwork exactly — or you buy the door or trim yourself and we install it. Everything is confirmed before the crew is scheduled.
- 3
Clean, precise installation
The crew shows up on time, protects floors and furniture, and installs with tight joints and consistent reveals. Photos of the finished work go in your job folder.
- 4
Walkthrough and invoice
We walk the finished work with you. If anything is not right, we fix it before we call the job done. Then one invoice, paid by check or direct deposit — no card fees, no payment links.
Situations and options
Eight-foot vinyl slider
Two four-foot panels in a vinyl frame, white or a color, with clear or grid glass. Custom ordered to the opening with the lead time on the quote.
Eight-foot fiberglass or wood-clad
A stiffer frame for big panels, in colors and with a wood interior option. Costs more than vinyl and is built to order.
Eight-foot French-style slider
Wider stiles and rails so the slider reads like a pair of French doors. Same opening, same install, custom ordered.
8-Foot Patio Door Replacement: questions, answered
Can an 8 foot sliding glass door be replaced with the same size?
Yes. The new door is ordered to the existing opening, and the old frame comes out and the new one goes in on a full-length sill pan. JMB Builders does this one door at a time across the Twin Cities metro, priced per door with the frame and screen included. Send photos and we reply within one business day, or book a free in-home estimate.
Is an eight-foot patio door in stock or custom ordered?
Usually custom ordered. The shelf item at our supplier is the six-foot white vinyl slider. An eight-foot door is built to your opening in the color, glass and grids you pick, and the lead time is written on the quote before you sign.
How do I know if my patio door is six feet or eight feet?
Measure the frame from outside edge to outside edge. A six-foot door measures a little under six feet and an eight-foot door a little under eight. Send the number with your photos and we confirm it at the measure.
Why does an eight-foot door cost more than a six-foot door?
More glass and more frame, panels that are heavier to build and ship, a longer sill pan and more trim, and two people to set it. The install day is about the same. The quote shows the door and the install as separate lines.
Can I replace an eight-foot slider with French doors or a smaller door?
Yes, but that is a different job. A hinged French door in the same opening is a custom order with the swing chosen on the order. A smaller door means framing in part of the opening and patching siding and drywall, which we quote separately.
Does a wide patio door need special glass?
Tempered glass is required on patio doors of any size. On an eight-foot door the panels are large enough that a low-e coating or triple pane makes a bigger difference to the room's comfort than on a window. We go over the glass options when the door is ordered.
Recent JMB work, from our job log
59 installs recorded across 30 Twin Cities communities since Dec 2025. Window and door installs for homeowners and the builders we work with. Counts come straight from our job log; no customer names.
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Read morePage reviewed October 25, 2026 · JMB Builders LLC, MN license BC809005 · All doors pages
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Door Replacement & Installation near you
Based in Zimmerman, scheduling across the Twin Cities metro. Closest first: