How to Remove Limescale Before Moving Out

Why London has so much limescale

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Most of London's tap water is hard. It comes largely from chalk and limestone, and it carries dissolved calcium and magnesium. When the water dries on a surface or is heated, those minerals are left behind as the white, chalky crust we call limescale.

This is why clerks look for it. It is easy to see, easy to photograph and easy to compare with the check-in report. A tap that was clean at the start and is crusted at the end looks like a cleaning point, even though the cause is the water. Light build-up over a long tenancy is arguable as wear. Thick build-up is usually treated as dirt.

How to remove limescale before moving out: what you need

You do not need specialist products for most jobs. Limescale is alkaline, so it dissolves in a mild acid.

• White vinegar or a citric acid solution. A spoonful or two of citric acid powder in a cup of hot water is a common mix.
• A branded limescale remover for toilets and heavy build-up. Follow the label.
• Microfibre cloths and an old toothbrush for edges and around tap bases.
• Kitchen roll or an old cloth to hold acid against a vertical surface.
• Rubber gloves and good ventilation. Open a window.

Taps and sinks

Soak a cloth or kitchen roll in vinegar, wrap it round the base of the tap and the spout, and leave it for 20 to 30 minutes. Remove it, scrub the softened scale with a toothbrush, rinse with clean water and buff dry with a microfibre cloth.

Do not leave acid on chrome for hours, and never use scourers or wire wool. Brass, gold effect, black and brushed finishes can be dulled or marked by acid, so check the finish first and use a short contact time on a hidden spot. Dry the tap at the end, because drying stops new spots forming.

Shower screens, tiles and shower heads

For glass screens, spray with a 50:50 mix of white vinegar and water, leave it for 10 minutes, wipe with a microfibre cloth and squeegee dry. Repeat on stubborn patches. A hard film that remains may need a second round or a non abrasive paste of bicarbonate of soda and water.

For a shower head, fill a bag or bowl with vinegar, cover the head, and leave it for around an hour. Brush the nozzles, rinse and run the shower for a minute. If the head is a coated or plated finish, shorter soaking is safer. Tile grout should be treated with care, since acid left on grout can eat at it.

Kettles, toilets and the bath

For a kettle, fill it halfway with a half and half mix of water and white vinegar, boil it, leave it to stand for 30 minutes, then pour it away and rinse thoroughly. Boil fresh water twice and discard it to clear the taste. Citric acid works well here too.

For a toilet, apply a toilet limescale remover under the rim and around the waterline, leave it for the time on the label, brush and flush. Tidemarks at the waterline are the classic spot. Never mix products, and never combine bleach with vinegar or any acid, because it releases harmful gas. For baths, use the same vinegar method as for screens and rinse well.

Prevent limescale coming back before the check-out

If you finish early, a few habits keep the work done. Wipe taps and screens dry after the last shower, and keep the kettle empty of standing water. Run the washing machine and dishwasher on an empty cycle with citric acid, if the manufacturer allows, so the inside is not left crusted.

Do the descaling after the heavy cleaning and before the final floor mop, so drips do not mark clean floors. Take your photos once everything has dried, because wet surfaces can hide residue. A final look with a torch at an angle shows any white film you missed.

Whatever you use, rinse well. Leftover acid keeps working and can mark metal and sealant. Dry with a clean microfibre cloth, and then photograph each fitting from the same angle a clerk would. Dated photos of clean taps, screens, the toilet and the kettle are useful evidence if a cleaning deduction is raised.

What not to use, and which surfaces to avoid

The wrong method can cause damage that costs more than the limescale. Here is a quick guide:

A fast order of work, and when to stop

Start with things that need to soak, such as the shower head and kettle, then do taps, screens and tiles while they sit. Finish with the toilet and floors. Dry every tap and screen at the end, and take dated photos once it is done.

If limescale is thick, repeated treatment is better than harsher chemicals. Stop if a finish looks dulled, and do not scrub stone. For a deeper clean, our end of tenancy cleaning includes descaling the sink and taps, and bathroom taps, screens, shower heads, tiles, grout and toilet, with products and equipment supplied. The base price starts at £95 for a flatshare room, and the deposit-back guarantee and 72-hour re-clean cover the agreed work.