Bathrooms are among the most used areas in any home or commercial building, which means they are prone to a buildup of dirt, bacteria, limescale and mould.

If bathrooms aren’t cleaned often enough, they stop being pleasant spaces to spend time in and can even pose health hazards.

In this guide, we’ll share professional tips for keeping your bathroom spick and span as leading installers of commercial bathrooms across the UK.

If you happen to own a commercial space, we’ve also included specialist tips to help keep your building safe and legally compliant.

What You Will Need

Before you start, get everything together so you are not stopping halfway through to hunt for supplies.

Cleaning products

  • Limescale remover or white vinegar
  • Bleach or a bleach-based bathroom spray
  • All-purpose antibacterial cleaner
  • Grout cleaner or a bicarbonate of soda and water paste
  • Glass cleaner
  • Toilet cleaner with limescale remover

Equipment

  • Rubber gloves
  • Microfibre cloths (several)
  • Old toothbrush or grout brush
  • Toilet brush
  • Mop and bucket
  • Spray bottle if decanting solutions

Ventilate the room before you start. Open a window or run the extractor fan throughout. Mixing bleach and other cleaning products in a poorly ventilated space is a genuine health risk.

Step 1: Clear The room

  • Remove everything from surfaces bottles, soap dishes, accessories, towels, bath mats.
  • Put towels and mats in the wash.
  • Empty any bins.

Step 2: Apply Products And Let Them Dwell

Apply your toilet cleaner inside the bowl first and leave it to work. Spray bleach or bathroom cleaner onto the shower tray, bath and sink, then leave for the time recommended on the label. Applying products and walking away means the chemistry does the work rather than your elbow.

Step 3: Tackle The Toilet

  • Scrub the inside of the bowl with a toilet brush, paying attention to under the rim.
  • Wipe the outside of the pan, cistern, flush handle and hinges with an antibacterial cloth. These are the highest-contact surfaces in any bathroom.
  • Clean the toilet seat on both sides.
  • Finish with the base and the area around the floor fitting.

Step 4: Deep Clean The Shower Or Bath

  • Scrub the shower tray or bath with your cleaner, working on any soap scum or discolouration.
  • Use a dedicated limescale remover on shower screens, taps and showerhead. Wrap a cloth soaked in limescale remover around the showerhead and leave for 20-30 minutes if the buildup is heavy.
  • Scrub grout lines with a grout brush or old toothbrush. A paste of bicarbonate of soda and water works well on discoloured grout, or use a dedicated grout cleaner for anything more stubborn.
  • Rinse everything thoroughly and dry the screen with a squeegee or microfibre cloth to prevent water marks.

Step 5: Clean The Sink And Vanity Area

  • Scrub the basin, paying attention to the overflow hole and around the plug. Both of these areas are common spots for mould and residue.
  • Clean the tap and any mixer fittings with limescale remover if needed.
  • Wipe down the vanity unit, any shelving and mirror or mirrored cabinet with glass cleaner.

Step 6: Walls and tiles

Work in sections. Spray the tiles with an appropriate cleaner and wipe down, then go over the grout lines. For bathroom tiles specifically, the grout is where mould takes hold first. If you can see black spots, a grout cleaner or diluted bleach applied with a brush and left to dwell will usually shift it.

For guidance on specific tile types and the right cleaning products for each, see our guide to cleaning bathroom tiles.

Step 7: Extractor fan

Remove the cover and wipe the blades and housing with a dry cloth or use a vacuum attachment to remove dust. A blocked fan does not just reduce airflow, it also increases the humidity that leads to mould. Replace the cover and wipe down.

Step 8: Floor

  • Sweep or vacuum first to remove loose debris, hair and dust.
  • Mop with an appropriate floor cleaner (use a pH-neutral product on natural stone).
  • Pay attention to the area around the base of the toilet and along skirting boards
  • Leave the floor to dry completely before replacing mats.

Step 9: Final checks

Wipe down light switches, door handles and any pulls or handles. These are all common touch points that are rarely cleaned. Replace clean towels and mats, restock supplies and ventilate the room for a final 10-15 minutes.

How Often Should You Deep Clean a Bathroom?

For a household bathroom used daily, a thorough deep clean every four to six weeks is a reasonable baseline. High-use family bathrooms may warrant every two to three weeks.

The signs you are overdue: visible limescale on fittings, discoloured grout, a persistent musty smell, or mould appearing around the shower seal or on the ceiling.

Deep Cleaning Commercial Washrooms: What Is Different

Everything above applies to commercial washrooms, but the scale, frequency and compliance requirements are significantly higher. A washroom used by 50 or 100 people per day cannot be managed on a domestic schedule.

Legal & Regulatory Requirements

Employers are required under the Workplace (Health, Safety and Welfare) Regulations 1992 to maintain sanitary facilities in a clean and orderly condition. This is not optional - it is a legal duty.

In practice, this means:

  • Surfaces and fittings must be kept clean and free from obvious contamination
  • Floors must be free from slipping hazards
  • Facilities must be adequately ventilated and lit
  • Hand washing facilities with hot and cold water must be available and functional

For premises open to the public such as offices, restaurants, gyms, schools, the standard is higher because of the volume of users and the duty of care owed to visitors.

How Often To Clean A Commercial Bathroom?

Commercial washrooms typically require:

  • Daily cleaning of all surfaces, toilets, sinks and floors
  • Restocking of consumables (soap, hand towels or dryer function, toilet paper) checked at least once per day in high-traffic facilities
  • A weekly or fortnightly deeper clean covering grout, limescale treatment, fixtures and behind fittings
  • Monthly or quarterly deep cleans covering drainage, fan units, cubicle partitions and any tiling behind WC pans

In healthcare, education and food service settings, more frequent schedules and documented cleaning logs are standard practice and may be required by sector-specific regulations.

Grout And Tiling In Commercial Washrooms

Standard domestic grout is not appropriate for commercial washrooms. Heavy use accelerates staining and deterioration. If you are finding that deep cleaning is not shifting discolouration or that grout is crumbling between cleans, it is likely the original specification was not suited to the environment rather than a cleaning problem.

Commercial washrooms should use an epoxy or a high-density cementitious grout with a low water absorption rate. These are significantly more resistant to staining, mould growth and bacterial penetration than standard grout products.

When Cleaning Is Not Enough

There is a point at which a commercial washroom that needs constant deep cleaning to look acceptable is a washroom that needs refurbishing. Common indicators:

  • Persistent mould that returns within days of being treated
  • Tiles or grout that will not come clean regardless of the product used
  • Ageing fixtures with surface deterioration that harbours bacteria
  • Caulking or seals that are cracked, stained or lifting
  • Inadequate ventilation leading to recurring damp and odour

If your commercial washroom has reached this point, the most cost-effective solution is often a full or partial refurbishment rather than escalating cleaning costs. Our commercial washroom refurbishment service covers full strip-out and refit, or targeted upgrades to the elements that are causing the most problems.

Bathroom Deep Cleaning FAQs

How Long Does It Take To Deep Clean A Bathroom?


For a standard household bathroom, allow 45 minutes to an hour and a half depending on the level of buildup and the size of the room. Commercial washrooms take significantly longer depending on the number of cubicles and fittings.

What Is The Best Product For Deep Cleaning Bathroom Grout?


A dedicated grout cleaner applied with a stiff brush is the most effective option for general discolouration. For black mould on grout, diluted bleach left to dwell for 10-15 minutes before scrubbing will usually work. Avoid acidic cleaners on natural stone tiles as they can etch the surface.

How Do I Prevent Mould Coming Back After Deep Cleaning?

Ventilation is the primary factor. Run the extractor fan during and for at least 20 minutes after every shower or bath, and keep a window open where possible. Wiping down wet surfaces after use significantly reduces the moisture that mould needs to grow.

Can I Use Bleach On All Bathroom Surfaces?


No. Bleach is effective on most ceramic and porcelain surfaces but should not be used undiluted on natural stone, coloured grout or chrome fittings. Always follow the product instructions and rinse surfaces thoroughly after use.

Does Your Commercial Washroom Need More Than A Clean To Bring It Up To Standard?


Over time, all commercial washrooms including customer facing toilets or employee bathrooms lose their sparkle. Once a clean isn’t enough to bring your facilities up to scratch, a refurbishment will be necessary.

Inspired Washrooms designs and installs washroom facilities for offices, schools, gyms, hospitality venues and other public buildings across the UK.

To get a free quote for a commercial bathroom installation, please send us a message or give us a call on 0115 671 3850.