The mistakes owners make with kitchen and bathroom strip-outs

Why are kitchens and bathrooms the riskiest rooms?

Kitchens and bathrooms concentrate the services of a home: water supply, drainage, gas in some older properties, extraction ducts and heavy electrical loads. They also hold the heaviest finishes, with tiles on walls and floors that are often set on thick mortar. A mistake here does not stay in the room; it reaches the flat below or the shared vertical pipes of the building.

That is why our kitchen and bathroom strip-out work always starts with services and pipe routes, not with the hammer.

Mistake 1: assuming the water and power are off

Closing the main stopcock of the flat does not always isolate everything. In many apartment blocks on the Costa del Sol, pipes from a neighbour or a shared riser pass through a bathroom wall, and some properties have more than one supply point. The same goes for electrical circuits: an old kitchen may have a socket fed from another circuit that nobody labelled.

Before demolition, the supply should be isolated by someone who knows the property, the open ends capped, and any pipe that runs through the area identified. If you are not in Spain, arrange for your plumber or electrician to be present or to leave clear instructions. It costs far less than a flooded ceiling downstairs.

Gas deserves its own mention. Some older kitchens still have a gas supply for a cooker or water heater, sometimes from bottles, sometimes from a piped connection. That supply has to be disconnected and made safe by an authorised installer before anyone works near it, and the disconnection should be confirmed in writing so that the strip-out crew is not relying on memory or assumptions.

Mistake 2: a scope that stops at the tiles

"Strip out the bathroom" can mean removing the sanitary ware and tiles, or it can mean taking everything back to the slab, including the screed, the old waterproofing and the pipes in the walls. If the new bathroom is going to have a walk-in shower or a different floor level, the old screed almost certainly has to go, and that is a bigger job.

Agree with your installer what the new room needs before the strip-out is quoted. A good rule is to describe the finished state you expect: "walls back to brick, floor back to slab, all old pipes removed to the riser". The same applies to kitchens, where the question is whether the floor tiles under the units are lifted and whether a partition is coming out to open the space; that last part is covered under wall removal.

Mistake 3: forgetting the shared pipes and the flat below

Bathroom drains connect to a vertical downpipe shared by the whole building. Breaking the connection carelessly, or leaving it open, can send dust and debris into the shared pipe or let odours and water back into your flat. Damaging the downpipe itself is a problem for the whole community.

Under Ley 49/1960 on horizontal property, works affecting common elements need the agreement of the owners' meeting, and the community must be informed before walls, structure or façade elements are demolished. Shared downpipes and risers are typically common elements, so keep work on them to the minimum agreed with the administrator. The neighbour below also deserves a warning: impact noise and vibration from lifting floor tiles travel downwards. Our guide on community of owners rules covers the practical side.

Mistake 4: ordering the new kitchen before the old one is out

It is tempting to order units, a worktop or a shower tray from abroad so that everything is ready. The problem is that the real dimensions of a room often change once the old finishes are off: walls are not square, the floor needs levelling, a pipe sits where the plan said there was nothing.

Measuring for the new kitchen or bathroom after the strip-out, or at least confirming dimensions then, avoids expensive returns. It also gives your installer a clean, honest starting point.

Mistake 5: ignoring what might be in older materials

Older bathrooms and kitchens sometimes contain asbestos-cement elements: a flue for an old water heater, a cistern, a small water tank, pipes or panels behind the tiles. These must not be broken with the rest of the rubble. If suspect material appears, work on it stops, and the removal is carried out by a RERA-registered company working as our subcontractor under a work plan approved by the labour authority. The waste goes separately, never mixed.

The guide on hidden asbestos in interior renovations lists the usual places. For broader asbestos questions, retiradauralitamalaga.eu explains how to recognise uralita.

Mistake 6: no plan for floors, ceilings and dust

Owners often think of the walls and forget what sits above and below. A false ceiling in a bathroom may hide an extractor duct or old wiring; a kitchen floor may be laid over a second, older floor. Both affect time, waste and the next trade's work. Our floors and ceilings removal service is usually quoted together with the kitchen or bathroom for this reason.

Dust is the other forgotten item. Without sealed doorways and covered furniture in the rest of the home, fine tile and plaster dust ends up everywhere. Agree in advance which rooms are sealed and what is moved out, especially if you will not be there to do it yourself.

How do you avoid these mistakes?

A short checklist before the strip-out starts prevents most of the problems above:

• Services located and isolated by someone who knows the property, with pipe routes identified.
• Scope written as a finished state, agreed with the installer of the new room.
• Community informed, neighbour below warned, work on shared pipes agreed.
• Suspect materials checked before breaking, with a plan if anything is found.
• New units ordered only after measurements are confirmed on the stripped room.
• Dust protection and furniture removal agreed in writing.

If you are planning both rooms at once, our post on stripping out an apartment you rarely visit explains how to organise it remotely.