Preparing an apartment for painting: what determines a clean result?

This guide helps you prepare the next steps around your renovation in the Zurich region in a structured way. Explore renovation.

Why does a clean painting result start with the substrate?

Preparation determines the result — not the paint. A sound, dry and clean substrate ensures that paint covers evenly and adheres durably. Anyone who skips this step risks blisters, peeling or patchy areas that cannot be concealed once the paint has dried. Take time for a thorough assessment before you pick up the first brush.

How do I assess the condition of the walls before painting?

Go through each room and check every wall and ceiling in good light. Look for cracks, wall-plug holes, loose paint layers, water stains, mould traces and unevenness. Small cracks and holes can be filled with filler and sanded smooth after drying. Larger damage, recurring cracks or moisture point to a substrate problem that must be resolved before painting.

How should I deal with mould or moisture on walls?

Mould on walls is not a cosmetic problem — simply painting over it does not solve the cause and often makes the situation worse. First clarify where the moisture is coming from: leaking joints, poor ventilation, defective waterproofing or residual building moisture. Only once the cause is resolved can the substrate be treated and painted. In a rental apartment, notify the property manager before intervening yourself.

How do I tape and cover properly?

Clean edges and protected floors are not details but the basis for a professional result. Carefully tape window frames, door frames, skirting boards, light switches and sockets with painter's tape. Cover floors with protective fleece or sheeting and secure the edges so nothing slips. Remove the tape while the paint is still slightly damp — this produces the cleanest edges.

What drying times should I observe?

Between two coats the previous layer must dry completely. Drying time depends on the product, layer thickness, room temperature and ventilation — allow four to six hours for emulsion paint, often longer for primer. Read the manufacturer's instructions on the container. Painting too early risks blisters, uneven coverage or a patchy finish. Allow enough time, especially when several rooms are being painted on the same day.

What do I need to consider in a rental apartment?

In a rental apartment, special rules apply: check the tenancy agreement and the move-in protocol before painting. Some property managers specify the colour, quality or even the company that carries out the work. For larger changes — such as coloured walls or textured surfaces — obtain written consent in advance. This avoids being asked to reverse the work at the handover.

Why is preparation before painting so important?

Preparation determines whether paint adheres evenly and edges look clean. Check the substrate, cracks, wall plugs, coverings and furniture early. Only then can the actual scope of a renovation be discussed sensibly.

How should I prepare walls and materials?

A clean result starts with a sound, dry substrate. Move furniture away or cover it carefully, remove dust and check for cracks, wall-plug holes and loose paint layers. Choose paint and primer to suit the surface and room climate. For edges, surfaces and repairs you need suitable rollers, brushes, covering material, a scraper, sandpaper and good lighting. Observe the drying times of each product before applying the next coat or moving furniture back against the wall.

When should a professional be involved?

With moisture, mould, recurring cracks or very uneven walls, the cause should be clarified first. Paint cannot solve a substrate problem. High ceilings, many repairs or delicate surfaces are also situations where a professional can assess the scope better. In a rental apartment, the tenancy agreement, move-in condition and consent from the property manager are important points before you plan paint or major changes.

What tools do I need for painting?

For a clean result you need at least: quality paint rollers in the right size, an edge and corner brush, painter's tape, protective fleece or sheeting, a scraper, sandpaper, primer and enough paint. Buy slightly more paint than you think — top-ups from a different batch can differ slightly in colour. A good extension pole saves using a ladder for high ceilings.

When is a professional painter worthwhile?

For large areas, high ceilings, many repairs, difficult substrates or when the result needs to be flawless for a handover, a professional painter saves time and stress. The founders of Fedenko bring over 15 years of professional experience in renovation and painting.

How do I avoid the most common painting mistakes?

The most common mistakes are: too little preparation, paint applied too thinly or unevenly, drying times between coats that are too short, poorly taped edges, and forgetting corners and hard-to-reach areas. Work systematically room by room, paint edges first then surfaces, and check the result in daylight. Take your time — haste is the greatest enemy of a good painting result.

How long should paint dry between coats?

Drying time depends on the product, room temperature and ventilation. Most interior emulsion paints in Switzerland are touch-dry within two to four hours and can be recoated after four to six hours at room temperature. High-quality paints often state the exact recoat time on the tin — follow this rather than guessing. Painting a second coat too early traps moisture between layers, which can cause bubbling, uneven sheen or poor adhesion. In bathrooms and kitchens, where humidity is higher, allow extra drying time and keep windows open if possible. Cold or damp conditions slow drying significantly; avoid painting when room temperature is below ten degrees. Once the final coat is fully dry — usually after twenty-four hours — you can move furniture back into position and remove protective coverings.