A well-planned decontamination room should make the journey from used instruments to sterile storage simple and predictable. The layout matters just as much as the equipment.
Divo Interiors has been fitting decontamination rooms in London dental practices for over 25 years. Where figures or guidance are mentioned, the relevant sources are listed at the end of the article.
What a Decontamination Room Design Actually Has to Do
A dental decontamination room is where used instruments are cleaned, checked, packaged, sterilised and stored before they are needed again. The room needs to support that process without creating unnecessary movement or cross-contamination.
That process affects the whole room. The position of the sink, worktops, equipment, doors and storage all need to work together so instruments can move through each stage without crossing back over the clean side.
- Keeps dirty and sterile work apart. Used instruments need to stay on the dirty side of the process, away from cleaned and packaged instruments.
- Makes each stage clear. Washing, inspection, packaging, sterilisation and storage should follow an easy-to-understand sequence that staff can repeat consistently.
- Limits unnecessary handling. A sensible layout reduces the amount of carrying and moving between stages, making the workflow easier for the team.
- Supports compliance. The layout needs to reflect the relevant guidance and the way the practice actually carries out its decontamination process.
The Three Zones: Dirty, Clean and Sterile Storage
Decontamination room requirements are largely about keeping the workflow logical and controlled. In a well-planned room, instruments move from the dirty side through cleaning and preparation to sterilisation and storage, rather than going backwards.
| Zone | What happens here | Key fittings |
|---|---|---|
| Dirty / receiving | Used instruments arrive here and are dealt with before moving into the clean part of the room. | Wash sink, ultrasonic bath and suitable inspection lighting. |
| Clean / packaging | Cleaned instruments are dried, inspected and prepared for sterilisation. | Washer-disinfector, worktop for packing and inspection equipment. |
| Sterile storage | Sterilised instruments are recorded and stored safely until they are required by the surgeries. | Steriliser, suitable storage shelving and batch records. |
The sketch below shows a simple way of arranging the three areas in one room. The important point is the sequence, rather than the exact shape of the room.
Send us your room and we will zone it
We can work through the layout with you before construction starts, using your existing floor plan to see how the zones can fit.
Complete Smiles
Harrow on the Hill, London — general dentistry
At Complete Smiles, the wider practice fit-out included a dedicated decontamination room serving the surgeries. The room was planned as a separate part of the clinical workflow.
The wash, preparation and storage areas were arranged in sequence, giving the team a straightforward route through the room and back to the surgeries.
Why a dedicated room
Several surgeries needed to use the same decontamination process.
Complication
The three areas had to fit comfortably into a relatively compact room.
Result
A compact layout with clear separation between the different stages of the process.
Room Decontamination Workflow: Following the Instrument, Not the Clock
When planning room decontamination, it helps to start with the instrument journey rather than the equipment list. Follow one tray from the moment it arrives and the layout becomes much easier to work out.
- Transport. Used instruments arrive in a suitable closed tray or container and are taken into the decontamination area safely.
- Cleaning. Instruments are cleaned, using the appropriate manual or ultrasonic process before moving on to the next stage.
- Rinse and dry. Instruments are properly rinsed and dried so they can be inspected before packaging.
- Inspection. Instruments are checked for cleanliness, condition and any remaining debris before they are packaged.
- Packaging and sterilising. Instruments are packaged as required and sterilised, with the process recorded as part of the practice routine.
- Storage and release. Sterile instruments are stored appropriately and made available to the surgeries when required.
Once that sequence makes sense, the position of the benches, equipment and storage becomes much easier to plan.
Kingston Orthodontics
Kingston upon Thames, London — orthodontic specialist practice
At Kingston Orthodontics, the existing decon room was relocated and reshaped as part of the refurbishment. The aim was to make the route between the surgeries and sterile storage more practical.
The new position was closer to the surgeries using it most often, reducing unnecessary movement for the team.
Why relocate
The original location meant staff were carrying instruments further than necessary.
Complication
Services had to be rerouted while keeping the existing practice operational.
Result
A more direct route between the surgeries and decontamination room.
Decon Room vs Sterilisation Room: Are They the Same Thing?
In many practices, a sterilization room in dental clinic and a decon room refer to the same room, although the terms describe slightly different parts of the process.
Sterilising is one part of the wider decontamination process. A decon room brings the different stages together in one planned workflow.
For design purposes, the key is to plan the room around the full decontamination process and the relevant guidance, rather than getting caught up in the name used for it.
Fitting a Dental Clean Room Into an Existing Practice
Not every practice starts with a blank sheet of paper. A dental clean room may need to be created within an existing practice, using the space and services that are already there.
- Look at neighbouring spaces. A store, office or other underused area may offer enough room for a new decontamination layout.
- Check the services. Water, drainage, extraction and power can quickly determine which spaces are practical and what changes will be needed.
- Keep the workflow clear. Even in a small room, dirty and clean work should remain clearly separated and the route through the room should make sense.
- Allow for the work itself. If the practice is staying open during refurbishment, agree how instruments will be processed while the room is being altered.
Every practice is different, so the final layout depends on the size of the practice, how the room will be used and the applicable guidance. The figures in this article are planning references, not a fixed specification.
Retrofitting into an existing room?
Send us the floor plan and we can look at whether the available space can accommodate a practical three-zone layout.
Dental Sense
Chobham, Surrey — general dentistry
At Dental Sense, an existing storage area was converted into a decontamination room as part of the wider practice fit-out.
Water and extraction were rerouted to work with the new room, while the three-stage workflow was retained within the available space.
Why retrofit
There was no spare space for a new room, so an existing storage area had to be reused.
Complication
New drainage and extraction had to be routed through an existing working building.
Result
An existing storage area was turned into a dedicated, clearly zoned decontamination room.
More Decontamination Room Design We Have Fitted
Here are three more examples of how decontamination areas can be incorporated into different types of dental practices.
The treatment room and adjoining decontamination area were planned and fitted out as part of the same workflow.
View project → Cap City DentalLondon · new-build decon roomThe decontamination room was included in the design from the earliest stage of the new-build practice.
View project → Perfect SmileMuswell Hill · refurbished decon roomAn older decontamination area was redesigned as part of the practice refurbishment, with clearer zoning and workflow.
View project →
Decontamination Room Questions, Answered
How big does a decontamination room need to be?
There is no single room size that suits every practice. The space needed depends on the number of surgeries, expected workload and the layout of the equipment.
Can wash and sterile areas share one room?
They can be accommodated in the same room when the layout keeps the different stages properly separated and the instrument flow is clear.
What guidance governs decon room design?
HTM 01-05 is the key UK guidance for decontamination in primary care dental practices, alongside the requirements that apply to CQC-registered practices.
Does a decon room need its own sink?
The decontamination process needs appropriate washing facilities, separate from the handwashing arrangements used by staff.
Can an existing room be converted into a decon room?
Often, yes. Existing stores or small rooms can sometimes be adapted, provided the necessary services and workflow can be accommodated.
Is a decontamination room the same as a sterilisation room?
They can refer to the same physical room, but sterilising is technically only one stage of the wider decontamination process.
