When the smell stays
Odour Removal After Water Damage in Greenbelt, MD
A smell that lingers after water damage is usually telling you something is still wet or still in the building. The restoration team we dispatch finds the source of the odour first, removes it, and then deodorises what's left.
Tell us what the smell is like and where it's strongest.
Smell Won't Go Away? Call NowReviewed
- Available 24/7
- Emergency response
- Crews familiar with Prince George’s County properties
- Straight answers on the phone
The problem
Most lingering odours have a physical source
After a leak, overflow or backup, a room can smell long after the water is gone. The smell is rarely just in the air. It usually comes from something: pad under the carpet that never dried, a cavity behind drywall that stayed damp, residue left by a drain backup, or contents that absorbed water and are still holding it.
Air fresheners, candles and open windows can mask that for a while, but as long as the source is still there the smell returns, often most noticeably on humid days or when the heating or cooling comes on.
Proper odour removal therefore works in order: find where the smell is coming from, remove or dry the source, clean the affected surfaces, and only then treat the air and the remaining materials.
Kinds of odour people describe
The type of smell often points toward the cause.
- A musty, earthy smell in a basement or closet, often from damp materials
- A sour or mildew smell from carpet after it seemed to dry
- A sewage smell after a drain or toilet backup, even once cleaned
- A stale, damp smell in a vacant unit or one that has been closed up
- Odour that gets stronger on humid days or when the HVAC runs
- A smell traced to one wall, corner or piece of furniture
In this corridor
Why odours linger in this corridor
Humidity is the main reason. Musty odours come from damp organic material, and in a humid Mid-Atlantic summer damp material stays damp. A basement or garden-level unit that took on water in July can hold onto that smell for weeks if it isn't properly dried.
Below-grade space and older construction make it harder. Concrete floors, block walls and plaster hold moisture and odour, and older homes around Greenbelt often have cavities, crawl spaces and built-in storage with little airflow.
Drain backups are another common source. Older cast-iron drain lines and tree-root pressure on laterals can push sewage into basements and ground-floor units. Even after visible cleanup, residue in porous materials keeps producing odour until it is removed.
In the first hour, if the smell is new and there is still water or waste present, stop the source if you can and avoid running fans that push the smell into other rooms. Backups often reach basement floors near equipment, so remember: if water is near outlets or panels, do not enter and call your utility and emergency services. Otherwise, note where the smell is strongest and when it's worst; that detail helps the crew find it.
Shared walls, shared floors
Odours that travel between units
In shared buildings, a smell in one unit can come from another, which makes tracing it a joint job.
Odour drifting between units? We'll help you work out where to start.
Smell Coming From Next Door? CallHow the work is done
How odour removal works
Locate the source
The crew uses moisture readings and a methodical walk-through to find where the smell is coming from, including behind baseboards, under carpet and inside cabinets.
Remove or dry it
Wet pad, damaged drywall, insulation or contaminated materials are removed. Materials that can stay are dried to normal moisture levels.
Clean affected surfaces
Floors, framing, subfloors and hard surfaces are cleaned. After a drain backup, cleaning is thorough and uses sanitising products appropriate to each material.
Deodorise
Once the source is gone, the crew treats the remaining odour with methods suited to the space, such as thermal fogging, hydroxyl or ozone equipment, or sealing primers on framing. They explain the method and any time the room needs to stay empty during treatment.
Check the result
The crew checks the space after treatment and confirms moisture readings are normal, so there is no hidden damp spot left to restart the smell.
Why masking doesn't work
Fragrance sprays and scented products cover an odour without removing it. Once they fade, the original smell is still there. Deodorisation only works properly once the source has been removed or dried, which is why it is always the last step rather than the first.
Tell us where the smell is strongest.
Track Down the SmellTime and cost
What affects time and cost
Time and cost depend mainly on:
- What's causing the smell: damp materials, sewage residue or contents
- How many rooms or units are involved
- Materials that must be removed before treatment
- The deodorisation method suited to the space
- Whether soft contents like furniture or rugs also need treatment
- Humidity during drying
A single damp room can often be dealt with in a day or two once the source is dried. Larger or sewage-related jobs take longer, and the crew will say so when they price it.
We'll explain what's causing it before pricing the treatment.
Ask What Odour Treatment CostsAfterward
Keeping it fresh afterward
In most cases the smell does not come back once the source is removed and the space is dry. If it does, it usually means there is moisture somewhere that wasn't found, and a follow-up visit with readings is the right next step.
In basements and garden-level units, running a dehumidifier through the humid months helps keep materials dry. Keep gutters and downspouts clear so rainwater is carried away from the foundation, and have slow drains checked before they back up.
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Questions
Odour removal questions
Usually because something is still damp or still holding residue: pad under carpet, drywall near the floor, a wall cavity, or contents that absorbed water. Until that source is found and removed or dried, the smell tends to come back.
It can reduce odour in the air, but it doesn't reach the material producing it. Once the purifier is off, or on a humid day, the smell generally returns. Removing the source is what works.
It is the final treatment step after the source is gone, using equipment and products that break down or neutralise odour in the air and on surfaces. Common methods include thermal fogging, hydroxyl generators and ozone equipment, depending on the space.
Some deodorisation methods require the treated space to be empty of people and pets for a period, and others don't. The crew will tell you which method they plan to use and how long the room needs to stay closed.
It is commonly removed once contaminated porous materials are taken out and the remaining surfaces are cleaned and treated. What matters most is that nothing porous that absorbed sewage stays in place.
Many soft contents can be cleaned and deodorised, either on site or off site. Items that absorbed sewage or stayed wet for a long time may not recover, and the crew will say so plainly.
Let the neighbour and the association or management office know, with notes on when the smell is strongest. Tracing it may need access to their unit or a shared space. Questions about who handles what belong with your association and your insurer.
It can indicate damp materials, which is where growth is possible, but a smell alone doesn't confirm anything. Moisture readings show where materials are wet, and that tells the crew where to look.
If the source has been removed and the materials are dry, humid weather shouldn't bring it back. A smell that returns only on muggy days is a useful clue that something is still damp, and repeat moisture readings are the quickest way to find it.
Still smelling it after the water's gone?
Call and describe the smell and where it's strongest. We'll connect you with a local crew that finds the source before treating anything.
Someone picks up at any hour and gives you a straight answer.
Speak With an Odour Removal Pro