Infectious Disease Disinfection
All surfaces receive full coverage with EPA-registered products for infectious disease disinfection.
See infectious disease disinfectionGet high-touch surfaces cleaned and disinfected in a home, office, rental or shared space in Four by Four after illness or possible exposure. EPA-registered products are used according to their labels.
COVID-19 and virus disinfection is a focused cleaning service for frequently touched surfaces and affected areas after illness or suspected exposure. It combines soil removal with an EPA-registered disinfectant used for the full contact time on its label.
An office, restaurant, school, home, rental property, care setting or another communal space may be covered. Touch points are identified by cleanup technicians. These often include desks, counters, door knobs, switches, shared equipment and bathroom fixtures. Nearby areas also receive consideration if people could contact them as they pass through the property.
This work is sometimes called coronavirus cleaning, COVID-19 decontamination, biohazard decontamination, biohazard remediation or infectious disease cleanup. It is different from ordinary janitorial cleaning. Cleanup crews use protective equipment, product instructions and a written scope so every step can be checked. The remediation process does not replace fresh air, building ventilation, handwashing or staying home when sick.

Technicians use protective gear, respect personal property and can arrive in unmarked vehicles when discretion matters to you or your loved ones.
The scope can match a home, office, restaurant, rental or other shared setting without treating every situation the same way.
The disinfectant name and label contact time are recorded so you know what was used on the property and can move forward with reopening plans.
Before work begins, you can verify every room, surface and sensitive material included in the cleaning service. Comparing the stated work is easier when the scope is clear.
COVID-19 disinfection can help when a room-by-room, documented cleaning plan is needed because of an illness, possible exposure or frequent use by many occupants. Situations commonly include:
Stores, gyms and public-facing businesses may need focused cleaning of counters, equipment and other repeated touch points.
After illness is reported or before another approved use, property owners may schedule cleaning for hotels, apartments or short-term rentals.
When someone has been sick, carefully clean high-touch surfaces across kitchens, bedrooms, common living areas and bathrooms.
Shared equipment, workstations, meeting spaces, bathrooms and break rooms can be treated ahead of a return to normal use.
Start by limiting access and gathering clear information about the rooms involved. Before cleanup technicians enter the property:
Call (888) 351-0904No distinct COVID-19 price appears in published guides. Guides for comparable infectious disease disinfection show a range of $1,000 to $10,000. Your actual scope is shaped by room and surface counts, the size of the space, the germ type, any requested air-system work and whether you request testing.
The figures shown are national ranges from published cost guides and are not based on an on-site visit. You learn what your property will cost after the on-site assessment and before any work begins.
Ask about cost: (888) 351-0904Insurance coverage can differ according to both policy terms and the reason for cleanup. Do not count on renters, business or homeowners insurance to pay for coronavirus cleaning done as prevention. Contact the insurance company in advance of the work when time allows.
The responsible party may depend on lease terms, local requirements and where the affected area falls within the rental or shared property.
Routine disinfection might be classified as maintenance, not as a covered insurance loss. Find out if a documented illness receives different treatment from another event under your policy.
Keep the cleaning scope, product list, photos and invoice. These records support insurance assistance and help insurance companies check what work was requested and completed.
A business owner should ask the insurance company about communicable disease terms, exclusions, deductibles and required records before relying on coverage.
A controlled sequence guides coronavirus biohazard decontamination. Assessment comes first, followed by cleaning, disinfection and a concluding check. Each product label directs the complete process, including the method used on individual surfaces.
You and the technicians examine the rooms, prior occupancy, delicate materials and frequently touched points before cleaning begins.
The work area is marked or closed as needed, and technicians select gloves, eye protection and other protective equipment for the products and setting.
Dust and visible soil are removed first because dirt can keep disinfectant from reaching the surface evenly.
For compatible materials, treatment uses an EPA-registered disinfectant with concentration and coverage based on label instructions.
Instead of an immediate wipe after spraying, the treated material stays wet throughout the contact time on the label.
Shared electronics, unfinished wood and soft materials receive methods suited to the item instead of being soaked with a general spray.
Each room is reviewed against the checklist, paying close attention to switches, door pulls, shared equipment and fixtures.
You receive the completed scope and product information, plus instructions about drying, ventilation and when the treated area can be used.
Call at any time. A COVID-19 and virus disinfection specialist answers, explains the steps and agrees a start time with you.
The main risks during disinfection come from illness exposure, chemical misuse and incomplete surface coverage. A careful plan limits avoidable contact and serious health risks without claiming that surface cleaning removes every route of transmission.
The label states how long a disinfectant needs to stay visibly wet. Wiping it dry too soon can keep it from working as intended.
Entering a recently occupied room can put cleaners near an ill person or contaminated items. Suitable protective gear and controlled access limit avoidable contact while cleaning takes place.
Additional chemical can sometimes be less safe. The wrong product, poor ventilation or mixed cleaners can irritate people and damage wood, fabric, electronics or finished surfaces.
Can you clean it yourself? If nobody is currently sick and there is no special exposure concern for the property, routine cleaning might be adequate. Professional cleanup can help you cover key touch points and follow product labels when known illness, sensitive materials, a large common space or a workplace requires a defined scope.
Virus disinfection usually treats surfaces rather than removing parts of the property. Compatible hard materials can be cleaned and disinfected. Porous belongings that are damaged or deeply soiled need a separate assessment.

An EPA-registered disinfectant must be appropriate for the surface and target virus, with its instructions followed for application, dilution and full contact time.
Where you may apply the disinfectant, the ventilation required and the protective equipment to wear are all controlled by its label.
Federal OSHA sets worker handling and protection requirements in Bloodborne Pathogens Standard 29 CFR 1910.1030 when potentially infectious materials or blood are found too.
Maryland calls this special medical waste, which can include blood-soiled articles. Maryland Department of the Environment rules control how it is handled, transported and treated, so it cannot go in household trash.
Focused work in a home can take several hours. For a commercial space with many rooms or an office of substantial size, the visit may be longer or phased. The schedule reflects furniture amounts, how many rooms are included, whether surfaces are compatible and required product contact times.
The full COVID-19 and virus disinfection guide covers what is cleaned or removed, odor and air quality work, and the rules that apply in Baltimore City.
Read the full COVID-19 and virus disinfection guide
Planning for access, containment and cleanup can depend on local population, housing and entry conditions.
Four by Four is listed about 1.5 miles from The Johns Hopkins Hospital, a relevant distance when prompt evaluation follows a biohazard exposure.
Connections to Berea, Belair-Edison, and South Clifton Park make a precise address important for coordinating cleanup access without unnecessary neighborhood attention.
In Four by Four, identifying the correct building entrance can reduce unnecessary movement through shared spaces during a sensitive cleanup.
Your phone conversation can include questions about service in nearby ZIP codes and communities.
All surfaces receive full coverage with EPA-registered products for infectious disease disinfection.
See infectious disease disinfection
MRSA, C. diff and norovirus cleanup for homes, care settings and gyms.
See mrsa, c. diff and norovirus cleanup
Commercial and industrial biohazard cleanup planned around site access and operating needs.
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Healthcare biohazard cleanup covers clinics, care facilities and residential care homes.
See hospital and healthcare biohazard cleanup
Workplace biohazard cleanup addresses office injuries and exposure incidents at work.
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When classes are not in session, biohazard cleanup addresses schools and childcare settings.
See school and daycare biohazard cleanup
Biohazard cleanup for hotels, Airbnb units and rental properties.
See hotel, airbnb and rental biohazard cleanup
Biohazards are cleaned from carpets and upholstery, or affected materials are removed safely when needed.
See biohazard carpet and upholstery cleaningCheck whether the wood is sealed and read both the furniture care directions and disinfectant label. After a spot test, you may apply a compatible product to sealed wood. Avoid saturation because unfinished or delicate wood may swell, become stained or lose its finish. If labeling excludes the surface, use another approach compatible with that material.
Coverage does not apply by default. Routine or preventive disinfection may count as maintenance under many policies, and treatment of another event depends on the policy. Explain the reason for the work when calling your insurance company, then ask about the deductible, exclusions and records you must submit. Keep the scope, product list, photos and invoice for the claim check.
The virus that causes COVID-19 is a biological agent, so work in the presence of known illness calls for precautions against exposure. The specific category for cleanup varies by setting and by whether bodily fluids, regulated waste or blood are present too. Routine surface disinfection is not the same task as blood cleanup or hazardous waste removal.
A focused home area may be completed in one visit. Cleaning a big commercial property, school or workplace may last longer or be split into stages. Timing depends on room count, furnishings, sensitive surfaces, product contact times and access. Have the scope list the areas being treated and all guidance about reentering them.
Alcohol-based sanitizer can reduce germs from your hands if you cannot access soap and water. Rub all areas of your hands until dry using a sanitizer that has at least 60 percent alcohol. Use hand sanitizer only on hands, never to disinfect furniture, rooms or electronic devices. Wash with soap and water when hands are visibly dirty.
Begin by cleaning visible soil, then use an EPA-registered disinfectant appropriate to the surface and virus being targeted. Apply full coverage and let the surface remain wet throughout the label's contact period. Never mix cleaning chemicals, ventilate according to directions and wear the protective equipment listed on the label.
Respectful, discreet COVID-19 and virus disinfection is available 24 hours a day, and crews arrive in unmarked vehicles.