Is a Sagging or Bubbling Ceiling About to Fall?
"I got home from work that evening to find the drywall in all the upstairs bedrooms sagging down from the rafters."
One commenter in r/HomeMaintenance described coming home to that.
A sagging or bubbling ceiling can be a sign that water is getting in1, and you can't tell from the floor how long the drywall will hold. Keep people out from under it, find where the water comes from, and call the right trade before you patch anything.
Quick answer:
- Keep people and pets out from under the sag, and don't press or poke it.
- Near a light fixture or wiring, turn off the electricity to that area2 and call a licensed electrician.
- Photograph or videotape the damage3 before you clean up or repair anything.
- Look from the ground with binoculars, then in the attic; don't risk serious injury trying to inspect the roof4.
On this page
Tonight you control three things: who stands under the ceiling, whether the water is stopped, and what your photos show.
Is a sagging ceiling about to fall?
Nobody can promise it will hold, so assume it can come down and keep the room closed. Move beds and furniture out from under the sag, and keep kids and pets out. Don't press or poke the bulge to test it. A professional should decide how to take it down.
While you wait: the first hour
- Water coming in now: put a bucket under the drip and move belongings away. If a pipe is the source, stop the water at the main valve or at the valves under sinks and near appliances5.
- Protect and record: take your photos before moving anything and save receipts. Insurers expect you to take reasonable steps to protect your property from further damage3, so catching drips and moving belongings is your part. If you think you may file a claim, keep damaged items, if possible, until the adjuster visits3.
- Dry what you can move: dry water-damaged areas and items within 24-48 hours6 to prevent mold growth.
- If nobody can come today: keep catching and drying the water, make only temporary repairs to protect your house and belongings5, and look again from the ground and the attic after the next rain.
What a sag, bulge or bubble tells you
Until proven otherwise, a sag is a moisture issue, and it marks where water collected, not where it got in. Leaks are rarely located directly above the water spot on the ceiling4, so the spot you see may sit away from the source.
What to look for:
- On the ceiling: sagging, cracks, water stains or bulging1.
- In the attic: a drip trail4 and wet insulation2.
A clean-looking surface doesn't clear the ceiling either: mold may be hidden on the back side of drywall and the top side of ceiling tiles6.
Roof, plumbing or something else?
If a bathroom, kitchen or appliance sits above the sag, check those pipes before the roof. Otherwise, check in this order: the roof from the ground, then the attic, then the pipes. Start with binoculars for a closer view of the roof, then check the attic for a drip trail4. If you go into the attic and don't see any wet spots right above the sag, that doesn't clear the roof, so look beyond that spot.
For those pipes, have a plumber check the lines. And not every sag comes from a pipe or the roof. In another thread, a reply traced a sag to an AC line: "Mine did this. But it was the condensation for the ACline had backed up, over filled the pan and leaked onto ceiling."
If your checks show no water anywhere, ask a drywall contractor or a roofer you choose to look at the ceiling. Ask them to tell you in writing what is causing it before they quote any work.
Is there a simple way to rule out the plumbing yourself? What to do when water leaks from a ceiling.
Why you shouldn't patch it until you fix the leak
Because paint or a patch hides the mark and leaves the cause running. After a roof leak of clean rainwater, drywall that is sagging or mildewing is not the kind to keep, and wet insulation must be removed2 for the ceiling to dry properly. Find and stop the water first, let the area dry, then repair.
Does insurance pay for a sagging ceiling?
It depends on the cause, and your policy decides. A sudden leak and a slow one are treated differently: homeowner insurance usually covers sudden leaks, but may not cover gradual leaks7.
If you file a claim in Texas, don't make permanent repairs until your insurance company sees the damage5. Before you call, have three questions ready: does my policy treat this as sudden or gradual, what is my deductible (the amount you pay before the insurer pays), and when can an adjuster see it?
How does a claim work if the roof is the source? Roof insurance claim process: what to do, in order.
Who to call, in what order
- Make the room safe and document it: keep people out, take photos, and stop the water if a pipe is the source.
- Trace the source from the ground, the attic and the pipes.
- Call the trade that matches what you found: a professional roofing contractor8 for the roof, a plumber for pipes, a licensed electrician near wiring.
- If you plan to claim, call your insurer with your questions ready.
The person who started one thread asked: "Who would I even call to help fix this?" Your own checks answer that.
Before you agree to any repair, ask the roofer to put the price of each problem in writing, with a photo of it. You can send this:
Please list each problem you find, with a photo and a price for each. If you find anything extra, stop and send me the price in writing before you do the work.
If a roofer pushes you to sign today or won't put this in writing, that is an answer too: weigh it against the quotes that do.
If the roof needs a temporary cover, what should you know first? Roof tarping: what to ask, what not to sign.
Before you call: a quick check
- Dated photos of the ceiling and the attic.
- What the ground and attic checks showed, and what sits above the sag.
- Where the wet spot sits compared with any light fixture.
- Your deductible, and whether you plan to claim.
- Your written questions about price per problem.
Quick questions
How do I fix the ceiling itself? Fix what caused it first. Once the area is dry, ask a drywall contractor to price the ceiling repair as its own line.
How much does it cost to fix a saggy ceiling? The price depends on what is behind the ceiling and how much drywall and insulation are wet. Ask for a written quote that lists each item, and for the drywall repair on its own line.
Should I worry about mold? If you need to be in a room with wet or mildewing drywall, avoid breathing in mold or mold spores; an N-95 respirator may help limit your exposure6.
Can I fix it myself? Not before the water is found, stopped and dried out. After that, a small repair is drywall work, and if it's not a job you want to do by yourself, a drywall contractor can.
Sources
1. NDSU Extension, Building owners should determine full extent of storm damage
2. U.S. Department of Energy (EERE, PATH), Repairing Roofs & Ceilings
3. Triple-I, How to file a homeowners claim
4. University of Wisconsin-Extension, Assessing and Repairing Leaky Roofs
5. Texas Department of Insurance, When are water damage and mold covered by insurance?
6. U.S. Environmental Protection Agency, A Brief Guide to Mold, Moisture and Your Home
7. Washington State Office of the Insurance Commissioner, Leaks, water damage and mold
8. National Roofing Contractors Association, Roof Repairs After a Storm
Found an error on this page? Email [email protected].