COMMERCIAL FLOOD DRYING ACROSS LONDON
Dry your property faster after flooding
Flooding can leave large amounts of moisture trapped in floors, walls, plaster, timber and furnishings long after visible water has been removed. Arctic Hire provides commercial dehumidifier hire across London, with flexible hire for homes, landlords, property managers and businesses. Start with a 50L unit for most rooms, with 70L machines or multiple units available for more heavily affected properties.
Flood drying — at a glance
RECOMMENDED EQUIPMENT
50L commercial dehumidifier for most rooms
LARGER PROPERTIES
70L units or multiple dehumidifiers
TYPICAL HIRE PERIOD
Often 1–3 weeks, depending on the flooding
BEST SETUP
Remove standing water, close openings and run continuously
FOR FASTER DRYING
Combine dehumidifiers with air movers
How do dehumidifiers help after flooding?
Removing standing water is only the first stage of recovering a flooded property. Water can penetrate deep into plaster, flooring, timber, concrete, insulation and furnishings even when surfaces look dry.
As the property begins to dry, trapped moisture evaporates into the surrounding air. Once that air becomes humid, natural drying slows down. A commercial dehumidifier extracts this moisture and releases drier air, allowing wet materials to continue releasing water.
For best results, keep the affected area reasonably enclosed while the dehumidifier is operating so it does not continuously process humid outside air.
Flood water commonly penetrates
Plaster and plasterboard
Timber and floorboards
Concrete and screed
Carpets and underlay
Skirting boards and furniture
Insulation and wall cavities
What should I do before using a dehumidifier after flooding?
A dehumidifier removes residual moisture from a property. It is not a replacement for extracting pools of standing water or stopping water that is still entering the building.
Make sure it is safe to use electrical equipment in the affected area and position each machine where air can circulate freely around it.
If flood water may contain sewage, chemicals or other contamination, seek professional flood-remediation advice before placing drying equipment in the area.
Before starting dehumidification
Stop the source of the water.
Remove standing water with pumps, wet vacuums or extraction.
Remove saturated materials that cannot be saved.
Confirm the area is safe for electrical equipment.
Position the dehumidifier with clear airflow around it.
Which size dehumidifier is best after flooding?
Start with a 50L unit for most rooms; choose 70L or multiple machines for larger areas
50L DEHUMIDIFIER — BEST FOR MOST ROOMS
A strong starting point for most residential flood-drying jobs. It provides substantially more drying capacity than a domestic unit while remaining practical to move around a house or flat.
One or two flooded rooms
Water-damaged kitchens and bathrooms
Wet flooring, carpets, plaster and walls
Small flats and residential properties
£80 per week
+ Free Delivery & Collection in Greater London and surrounding areas
70L DEHUMIDIFIER — FOR LARGER AREAS
For larger spaces or more severe flooding, a 70L commercial dehumidifier provides additional drying capacity. It is suited to open-plan areas, commercial premises, basements and heavily saturated properties.
Large open-plan areas and commercial premises
Basements and multiple affected rooms
Heavily saturated building materials
Larger flood-restoration projects
£95 per week
+ Free Delivery & Collection in Greater London and surrounding areas
How long should I run a dehumidifier after flooding?
Flood drying commonly takes longer than drying after a small leak. A sensible starting hire period is often 1–2 weeks.
More severe flooding may require 2–4 weeks or longer. A property can appear dry on the surface while holding substantial moisture within walls, floors and cavities, so moisture readings are the best guide for larger restoration jobs.
Our hires can be extended easily if your property needs longer to dry.
What affects flood-drying time?
How much water entered and how long the property was flooded
Which materials became saturated
The size of the affected area
Water beneath floors or inside wall cavities
Room temperature and air movement
The number and size of dehumidifiers in use
Should I use air movers as well?
For substantial flooding, combining a dehumidifier with an air mover can significantly improve drying conditions. Strong airflow helps moisture leave wet surfaces more quickly.
The dehumidifier then removes that released moisture from the surrounding air. This combination is widely used in professional water-damage restoration because it tackles both parts of the drying process.
For heavier flood damage, multiple air movers and dehumidifiers may be appropriate across separate rooms and wet zones.
Air movers encourage evaporation from
Floors and carpets
Walls and plaster
Concrete and screed
Timber and floorboards
Large saturated surfaces
Benefits of using a commercial dehumidifier after flooding
Powerful commercial equipment creates controlled drying conditions and helps moisture leave saturated materials faster.
Frequently asked questions about drying after flooding
Practical answers for safe, effective drying after significant water ingress.
Should I remove all standing water before using a dehumidifier?
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Yes. Pooled water should be removed first with a pump, wet vacuum or professional extraction. Once most free water is gone, dehumidifiers can remove residual moisture from the air and building materials.
Should I leave windows open when drying after a flood?
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Generally, no. After water extraction, keep windows and external doors closed while the dehumidifier runs. This creates an enclosed drying environment and avoids continuously processing humid outside air.
Should I run the dehumidifier continuously?
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In most flood-drying situations, yes. Continuous operation helps maintain lower humidity and keeps moisture moving out of wet materials, provided the unit is used safely and according to its instructions.
Should I use heating as well?
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Moderate warmth can encourage moisture to evaporate. Normal indoor temperatures are usually sufficient; warmth, airflow and dehumidification are more effective together than excessive heating alone.
Is one dehumidifier enough after a flood?
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It depends on the affected area. One 50L unit may suit a single room. Several flooded rooms or extensive water damage often dry more evenly with multiple dehumidifiers or a larger 70L unit.
Can a dehumidifier dry flooded carpets?
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It can help by reducing humidity, but heavily saturated carpet and underlay may need lifting or professional extraction first. Carpet affected by contaminated flood water may need replacement.
Can a dehumidifier dry concrete floors?
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Yes. Concrete and screed absorb significant water and can take time to dry. Commercial dehumidifiers create the low-humidity conditions needed for moisture to leave the floor gradually.
Can a dehumidifier dry underneath flooring?
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It can help, but enclosed areas are difficult to dry without airflow. Flooring may need to be lifted if water has reached beneath laminate, timber or insulation. Significant flooding may require specialist structural drying.
How do I know when the property is fully dry?
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Visual appearance alone is unreliable. Look for stable humidity, falling water collection and materials returning to normal. Moisture-meter readings or professional testing are best for extensive flooding or insurance work.
Can I use a dehumidifier after sewage flooding?
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Sewage-contaminated water requires specialist cleaning, removal and disinfection before normal drying equipment is used. Seek professional flood-remediation advice before beginning the drying process.