Floor Squeak Repair — Fixed From Below or Through the Floor Above
The hallway that announces everyone who walks down it at night, the spot by the bed, the whole upstairs of a house where the subfloor was nailed and never glued.
JMB Builders does floor squeak repair across the Twin Cities metro. From below, in an open basement or crawl space, the loose spot gets shims and subfloor adhesive at the joist or a screw block pulling the sheathing down tight. From above, through carpet or hardwood, break-away screws or trim-head screws into the joist stop the movement. Priced per project, quoted from your photos within one business day.
- Priced per project, one room or the whole floor
- From below: shims, adhesive, screw blocks
- From above: screws through carpet or hardwood
- Quote from photos in 1 business day
- Licensed MN contractor BC809005
A squeak is two pieces of wood rubbing. Most of the time it is the subfloor moving up and down on a nail that has worked loose from the joist, or a joist that shrank away from the sheathing after the house dried out. Sometimes it is a hardwood board rubbing its neighbor, or a stair tread on a stringer. The fix is the same idea every time: stop the movement, and the noise stops with it.
Where we fix it from depends on what is under the floor. If the ceiling below is open, an unfinished basement or a crawl space, we go from below and nothing upstairs is touched. If the ceiling below is finished, we go from above, through the carpet or the hardwood, with screws that leave nothing to see. A new floor going in is the best time of all: the old flooring is up, and the whole subfloor gets screwed down before the new one goes on.
A squeak is a noise, not a structural problem. A floor that is soft, sags or bounces is a different page. If we find that when we open things up, we say so and quote the subfloor repair instead.
What you supply
- A short video walking the squeaky spots, or a description of where they are and how many
- Whether the ceiling below is finished, or the basement or crawl space is open
- Furniture off the squeaky area, or tell us and we will quote moving it
- Access to the basement or crawl space if the fix is from below
What JMB supplies
- A walk of the floor with a helper below to find the joist and the spot that moves
- From below: tapered shims set in adhesive between joist and subfloor, never driven hard enough to lift the floor
- From below: a bead of subfloor adhesive along a joist that has pulled away, or a screw block pulling the sheathing down
- From above through carpet: break-away screws driven through the pad into the joist, snapped off below the surface
- From above through hardwood: trim-head screws at an angle into the joist, holes filled with a color-matched putty
- Before new flooring: the whole subfloor walked, marked and screwed to every joist on a grid
- Squeaky stair treads screwed and glued from below or shimmed at the stringer
- Photos of what was done in your job folder
How it is priced: per project
Quoted in writing from your photos within one business day. What moves the number:
- How many spots: one squeak by the bed vs. a whole hallway or a whole upstairs
- From below through an open basement ceiling, the fastest, vs. from above through finished flooring
- Carpet, which takes break-away screws, vs. hardwood, which takes angled trim-head screws and filling
- A finished ceiling below that rules out working from underneath
- Whether the subfloor is coming up for new flooring anyway, when the whole floor gets screwed at once
- Squeaks that turn out to be a loose stair tread, a duct rubbing a joist or a loose hardwood board
- A soft or sagging spot found on the walk, which becomes a subfloor repair quoted separately
A ten-second video of someone stepping on the squeak, with the sound on, tells us more than a photo. Add a photo of the ceiling below that spot, finished or open.
How long it takes
A few squeaks in one room, from either side: an hour or two. A whole upstairs from above through carpet: half a day. A full subfloor screwed down before new flooring: a few hours added to the flooring job.
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 quote within one business day. We only come out to measure first when the job needs a tape measure — no pressure, no games.
- 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
From below, open basement or crawl space
A helper walks the floor while we watch the joist move. A tapered shim with adhesive fills the gap at a single spot; a run of adhesive or a screw block fixes a joist that has pulled away for a length. Nothing upstairs is touched.
From above, through carpet
The joist is found with a stud finder and a test screw. A break-away screw goes through the carpet and pad into the joist, then snaps off below the carpet surface. The carpet closes over it and there is nothing to see or feel.
From above, through hardwood
Trim-head screws driven at an angle through a small pilot hole into the joist, heads set below the surface and filled with a putty matched to the floor. On a prefinished floor the holes land in the grain line where they disappear.
Before new flooring goes down
The old floor is up, so the subfloor gets walked, every loose spot marked and screwed into the joists on a grid across the whole room. The cheapest squeak fix there is, and it is part of every flooring job we do.
Floor Squeak Repair — Fixed From Below or Through the Floor Above: questions, answered
What makes a floor squeak?
Movement. The subfloor lifts off a nail as you step on it and drops back, the nail rubs the sheathing, and that is the sound. It happens where a joist shrank, where the subfloor was nailed but not glued, or where a joist is a bit low and the sheathing bridges over it. Hardwood boards rubbing each other and stair treads rubbing stringers squeak the same way. Fixing it means fastening the two pieces so they cannot move.
Can you fix a squeaky floor from the basement?
Yes, when the basement ceiling is open. Someone walks the floor above while we watch from below for the joist that moves. A tapered shim with adhesive goes into the gap at that spot, snug but not driven, or a bead of subfloor adhesive runs along a joist that has pulled away. Nothing upstairs is disturbed and the carpet or hardwood stays as it is.
How do you fix a squeaky floor under carpet without pulling it up?
With break-away screws. We find the joist under the squeak, drive a special screw through the carpet and pad into the joist, then snap the head off below the surface of the carpet. The carpet fibers close over the hole. It takes a few screws per spot and leaves nothing to see or feel underfoot.
Can you fix squeaks in a hardwood floor without damaging it?
Yes. Trim-head screws go in at an angle through a small pilot hole into the joist below, the heads set just under the surface, and the holes get a putty that matches the floor color. We land them in a dark grain line when we can. If the squeak is two boards rubbing rather than the subfloor, a little dry lubricant in the joint sometimes ends it without any screws.
Should squeaks be fixed before new flooring goes in?
Always. Once the old floor is up the whole subfloor is open, and it gets walked, marked and screwed to every joist across the room. That is the one time a squeak fix costs almost nothing, and a squeak left under a new floating floor is there for the life of the floor. Every flooring job we do includes this step.
Is a squeaky floor a sign of a structural problem?
Usually not. A squeak is noise from a loose fastener or a shrunk joist and the floor is as strong as it ever was. A floor that is soft underfoot, sags toward the middle, or bounces when someone walks past is different, and that is a subfloor or joist repair, not a squeak fix. If we find that on the walk we tell you and quote it separately; if the framing looks wrong, an engineer looks at it first.
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 for the builders and dealers we sub for. Counts come straight from our job log; no customer names.
Get a written quote for this job
Three photos and a sentence is enough. You hear back within one business day. Or text the photos to 763-204-2099.
Related jobs we do
Subfloor Repair — Soft Spots, Water Damage and Squeaks
A floor that gives under your foot by the toilet, the patio door or the dishwasher — opened up, the rotted subfloor cut out and replaced, and the floor made solid before anything new goes over it.
Read moreReplace Carpet With LVP — Carpet Out, Vinyl Plank In, One Crew
Worn, stained or allergy-trapping carpet out of the bedrooms, the living room or the whole main floor — and waterproof vinyl plank in its place, with the trim and doors handled by the same crew.
Read moreHardwood Floor Installation — Nail-Down Solid and Engineered
Real wood floors, installed the way they stay flat in a Minnesota house — acclimated, nailed tight on a checked subfloor, and trimmed out by the same crew.
Read moreEngineered Hardwood Installation — Glue-Down, Nail-Down or Floating
Real wood on top, a plywood core underneath, and three ways to put it down. The right one depends on whether you have a slab, a plywood subfloor or an old floor you are covering.
Read moreLVP Flooring Installation — Luxury Vinyl Plank Installer
Luxury vinyl plank laid flat and tight — floating or glue-down, on a wood subfloor or a basement slab — by the crew that also handles the doors, the trim and the transitions.
Read moreChoosing LVP: Wear Layer Thickness, Core Type and What to Buy
Every box of vinyl plank lists a wear layer, a thickness and a core, and the numbers are not interchangeable. Here is what each one means for your floor and what we need to know before you order.
Read morePage reviewed September 26, 2026 · JMB Builders LLC, MN license BC809005 · All flooring pages
Where we work
Flooring near you
Based in Zimmerman, scheduling across the Twin Cities metro. Closest first: