Whole-House Insert Replacement: Keep the Trim, Change the Windows
The oak casing is in good shape and you are not repainting the house. Insert replacement changes every window and leaves the trim alone, as long as every frame passes the check.
Reply within one business day. Or call / text 763-250-3621.
Whole house insert replacement sets a new window inside every old frame, so the interior casing, stools and aprons stay and the outside gets aluminum capping. JMB Builders checks each frame at the measure, since every frame has to be square, dry and solid for an insert, and any that fail are done full frame on the same order. Twin Cities metro. Send photos and we reply within one business day, or book a free in-home estimate.
- Interior trim stays on every window
- Every frame checked; the bad ones go full frame
- Photo reply within one business day, or free estimate
An insert, sometimes called a pocket window, is a complete new window built to fit inside your existing frame. The old sashes, stops and balances come out, the frame stays, and the new unit is set level in the pocket, screwed through its jambs, foamed and sealed. Inside, the casing is never touched. Outside, the old frame and sill are wrapped in aluminum capping so there is no wood left to paint.
On a whole house that saves a lot: no new casing to buy, cut, fill and paint in every room, less dust, and a faster install. The trade is a little glass area, because the new frame sits inside the old one, and the condition of the old frames, because the insert depends on them. A frame that is out of square, soft at the sill or leaking around the outside cannot carry an insert.
So at the measure every frame gets checked: a level across the sill, a square in the corners, a probe at the sill ends and the lower jambs. Most frames on a well-kept house pass. The ones that do not are written as full frame on the same quote, and from the street the two look the same once the capping is on.
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
- One photo of each window from inside showing the casing, labeled by room
- A close-up of each sill and lower corner from outside
- A note on any window that leaks, sticks or has soft wood
- Style, color, glass and grille choices
- Nothing for painting: existing trim stays, and any new stops are primed and caulked
What JMB supplies
- A frame check at every window at the in-home measure, with the insert or full-frame call written per line
- Inserts built to the measured frame, the whole house on one order
- Removal of sashes, stops, weights and balances; weight pockets insulated
- Each insert set level and plumb, screwed, foamed and sealed inside and out
- Aluminum capping over the exterior frame and sill in the color you pick
- New interior stops where needed, primed and caulked, and haul-away
- Photos of the finished windows in your job folder
How it is priced: per opening
Quoted in writing from your photos, with a reply within one business day. What moves the number:
- How many frames pass the insert check vs. how many need full frame
- Window line, series, style, color, glass package and grilles
- Capping color and how much old exterior trim there is to wrap
- Weight pockets to insulate on an older house
- Second-story windows that need brackets or a lift
- Rot found at a sill end once the sashes are out, priced as written on the quote
The outside close-ups matter most. The sill ends and the lower corners are where a frame fails the insert check, and seeing them early keeps the quote firm.
How long it takes
Inserts are built to the measure; lead time is on the quote. A whole house of inserts installs faster than full frame, usually two to three working days for twelve to twenty windows.
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
Inserts on every window
Every frame passed the check. New windows in every opening, casing untouched in every room, capping outside. The fastest whole-house install there is.
Inserts with a few full frames
Most frames pass and two or three do not. Those get full-frame units with new flashing and new trim inside, matched to the existing casing profile. Same order, same color.
Inserts now, trim refresh later
The windows go in as inserts. If you later repaint or replace the casing, the inserts stay; nothing about an insert prevents new trim down the road.
Whole-House Insert Replacement: Keep the Trim, Change the Windows: questions, answered
Can every window in the house be an insert?
Only if every frame is square, dry and solid. We check each one at the measure with a level, a square and a probe at the sill ends. On a well-kept house most pass. Any that do not are written as full frame on the same quote, and the capping makes the two look alike from outside.
What if a few frames are rotted on an insert job?
Those openings are done full frame: the old frame comes out, the rot in the sill or framing is cut out and rebuilt, a sill pan goes in and the new window is flashed to the wall. The interior trim on those windows is replaced to match the casing profile in the rest of the house. The other windows stay inserts.
Does a whole house of inserts take less time than full frame?
Yes, usually by a day or more on a typical house. There is no exterior trim to remove and rebuild, no interior casing to cut and fit, and less to clean up. Twelve to twenty inserts commonly take two to three working days with each opening closed the same day.
Will the inside trim be touched at all on an insert job?
The casing, stool and apron stay. The old interior stops come out with the sashes, and a new stop or a small filler is set against the new window where needed, primed and caulked. If your trim is stained wood, we match the stop to it as closely as current stock allows.
Can inserts go into a 1990s house with vinyl windows?
Usually not. Insert replacement works in wood frames that stay in the wall. An old vinyl or aluminum window is one piece, frame and sash together, so it comes out whole and the opening gets a full-frame unit. We tell you at the first look which kind of house you have.
Do insert windows match from the street?
Yes. The old exterior frame and sill are wrapped in capping in the color you choose, so all the windows show the same frame color and the same capping. A full-frame window next to an insert reads the same once both are capped or trimmed.
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 whole-house projects pages
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