Why Is My House Making Creaking Noises at Night?
Reviewed 2026-07-30 · How we research
Quick answer: creaking at night
Houses creak at night because framing cools and contracts after sunset. Wood shrinks across the grain as it loses heat and moisture, and nailed connections slip a fraction of a millimeter with an audible pop. It is normal unless it comes with new cracks, sticking doors or sloping floors.
Low urgency — monitor
Rhythmic creaks that follow the evening temperature drop are normal. Creaking paired with new drywall cracks wider than 1/8 inch, sticking doors, or sloped floors is structural and needs an engineer.
Sound travels well through a quiet house, so the same noises you never notice at 2pm are alarming at 2am. Most of what you hear is thermal movement, and it follows a predictable schedule: noise starts an hour or two after sunset and peaks as the structure sheds the day's heat.
The useful question is not whether your house makes noise. It is whether anything is moving permanently. Those tests take about ten minutes.
Most likely causes of creaking at night, ranked
1. Thermal contraction of framing and sheathing
Most common — the answer for the large majority of homes
Wood, steel connectors, plywood and shingles all have different coefficients of thermal expansion. A 30°F drop across an attic between 5pm and midnight moves a 30-foot roof assembly by a measurable fraction of an inch. That movement releases as discrete pops at nailed and bolted connections. Vinyl siding and metal ductwork tick for the same reason.
10-minute self-test: Log the noise for three nights: time, outdoor temperature, and rough location. Noises clustering in the two to four hours after sunset, strongest on days with large temperature swings, are thermal. Structural failure does not follow a thermostat.
2. Seasonal wood moisture change and truss uplift
Common, and usually a winter phenomenon
Framing lumber equilibrates to the surrounding humidity, moving from roughly 12% moisture content in summer to 6–8% in a heated winter house. Roof trusses with cold, dry top chords and warm, moist bottom chords can arch upward — 'truss uplift' — pulling the ceiling drywall away from interior partition walls by up to half an inch. It creaks, opens a crack at the ceiling-wall joint each winter, and closes again each summer.
10-minute self-test: In midwinter, look at the joint between interior partition walls and the ceiling in the center of the house. A crack that opens each winter and closes each summer is truss uplift, not structural failure. Measure it with a business card for reference.
3. Squeaking subfloor and stairs
Very common in homes over 15 years old
Nailed subfloor eventually separates a hair from the joist. Walking flexes the panel and the nail shank rubs against the wood, producing a squeak in a specific spot. Stairs squeak where treads have shrunk away from stringers and risers. Neither is a safety problem; it is a fastener problem.
10-minute self-test: Have someone walk the floor while you listen from the basement or crawlspace below. You can usually see the panel move at the joist. Mark it; that is where the screw goes.
4. Plumbing and HVAC thermal noise
Common and frequently mistaken for structure
Copper pipes expand about 1/8 inch per 10 feet per 100°F. When hot water runs, pipes slide through joist holes and tick. Sheet metal ducts oil-can and bang when the blower starts. Both make noise on a schedule tied to appliances, not to the building.
10-minute self-test: Run a hot tap for two minutes and listen. Ticking that follows the hot water line is plumbing. Note whether the noise starts within a second of the furnace or AC blower kicking on — that is ductwork.
5. Actual foundation settlement or framing movement
Uncommon, but the one that matters
Genuine structural movement is progressive and produces corroborating evidence: diagonal drywall cracks radiating from door and window corners, cracks wider than about 1/8 inch that keep growing, doors and windows that suddenly stick, gaps opening between trim and walls, and floors that slope. Foundation movement is usually driven by soil moisture — expansive clay, poor drainage, or a plumbing leak under the slab.
10-minute self-test: Roll a marble across the floor in several rooms and watch for consistent drift. Tape a strip of paper across any crack, dated, and check monthly — growth in 60 days means active movement. Check whether doors that used to close now bind at one corner.
What it costs to fix creaking at night
| Cause / repair | DIY cost | Professional cost |
|---|---|---|
| Noise log and marble test | $0 | n/a |
| Subfloor squeak screws / repair kit | $20–$45 | $200–$600 |
| Stair tread shims and adhesive | $15–$40 | $250–$700 |
| Pipe insulation and cushion clamps | $20–$50 | $150–$400 |
| Water hammer arrestor | $15–$40 | $150–$350 |
| Crown molding to hide truss uplift cracks | $100–$300 | $500–$1,500 |
| Drywall crack repair and repaint | $30–$80 | $300–$900 |
| Structural engineer inspection | n/a | $400–$900 |
| Foundation piering (if genuinely needed) | n/a | $6,000–$30,000 |
DIY fixes for creaking at night
Log before you worry
Three nights of notes — time, temperature, location — will resolve most of these cases for free and give an inspector something useful if you do call one.
Screw down the subfloor from below
From the basement, drive a 1-1/4 inch screw through the joist into the subfloor next to the squeak while someone stands on it. From above, use a squeak-repair kit with snap-off screws designed for carpet or hardwood.
Cushion noisy pipes
Foam pipe insulation where copper passes through joist holes stops the ticking. It also reduces standby heat loss on hot lines.
Fix the drainage before you fix the crack
Most residential foundation movement is soil moisture movement. Extend downspouts 6 feet, restore 6 inches of fall over the first 10 feet of soil, and keep watering consistent around the perimeter in expansive-clay regions.
Use crown molding for truss uplift
Fasten the molding to the ceiling only, not to both ceiling and wall, so it floats and hides the seasonal gap. Repeated re-taping of that joint will fail every winter.
Date and photograph every crack
A dated photo with a coin for scale is the cheapest structural monitoring available and is exactly what an engineer wants to see.
Where homeowners waste money on creaking at night
- Free foundation inspections from companies that only sell foundation repair.
- Repairing drywall cracks before establishing whether movement has stopped. They will reopen.
- Piering an entire foundation because of hairline cosmetic cracks in a house under 5 years old — some settlement is expected and normal.
- 'House-settling' sprays, injections and warranties sold door to door after a storm.
When to call a structural engineer about creaking at night
Hire an independent structural engineer — not a foundation repair company — if cracks exceed about 1/4 inch, if a crack grows measurably in 60 days, or if floors slope more than about 1 inch over 20 feet. The engineer has no product to sell you. A $500 report routinely prevents a $20,000 unnecessary piering job.
Call a plumber if you see foundation movement along with an unexplained water bill increase — an under-slab leak is a common and fixable cause of localized settlement.
Call a roofer if the creaking is accompanied by visible sagging in the roof line or daylight through the sheathing.
Why Is My House Making Creaking Noises at Night — questions homeowners ask
Is it normal for a house to creak at night?
Yes. Framing, sheathing, ductwork and siding all contract as they cool after sunset, and the movement releases as pops at fastened connections. The noise typically peaks two to four hours after sunset and is loudest on days with big temperature swings. New houses creak more because the lumber is still drying.
When is a crack in my wall serious?
Hairline cracks under about 1/16 inch, especially vertical ones at drywall seams, are cosmetic. Take seriously: diagonal cracks radiating from door and window corners, any crack wider than 1/4 inch, horizontal cracks in a foundation wall (which can indicate soil pressure), stair-step cracks in masonry, and any crack that measurably grows within 60 days.
Why do my ceiling and wall separate every winter?
Truss uplift. The top chord of the roof truss is cold and dry while the bottom chord is warm and moist, so the truss arches upward and lifts the ceiling drywall off interior partitions. It reverses in summer. It is a nuisance, not a structural defect. Hide it with crown molding fastened to the ceiling only.
Do I need a structural engineer or a foundation company?
Start with an independent structural engineer. They charge $400–$900 for an assessment, sell no product, and will tell you plainly if nothing is wrong. Foundation repair companies offer free inspections because the inspection is a sales call. If the engineer says you need work, then get three bids from contractors.
Problems related to creaking at night
- Why Is My House So Dry?Often shows up alongside this problem. Dry indoor air in winter is a leakage problem.Heating, Cooling & Air Low urgency — monitor
- Why Is My House Water Pressure Low?The first question is whether one fixture is weak or the whole house is weak.Plumbing, Drains & Sewer Get it inspected
- Why Is My House So Cold?Most cold houses lose heat through air leaks and thin attic insulation, not through a weak furnace.Heating, Cooling & Air Get it inspected
- Why Is My House Smelling Musty?Often shows up alongside this problem. A musty smell is microbial volatile organic compounds — geosmin and 2-methylisoborneol — released by mold and bacteria digesting damp material.Smells & Odors Get it inspected
Sources used for creaking at night
- InterNACHI — structural inspection standards and crack evaluation
- APA – The Engineered Wood Association — subfloor squeak and moisture guidance
- US DOE Building America — seasonal wood moisture content and truss uplift
- ASCE — residential foundation performance references