Spring Cleaning for Mould: The Places Your Usual Clean Misses

Start with the windows. Then look behind the curtains, furniture and cupboard doors.

A room can look clean while dampness collects out of sight. The back of a curtain, the wall behind a bed or the cupboard beneath a sink may tell a different story.

Spring cleaning is a useful opportunity to check those places after winter. Cleaning visible mould matters, but so does finding out why the surface became damp.

Our article, Healthy Homes Compliant, but There Is Still Mould. What Now?, explains why a compliance assessment does not replace attention to current property conditions. This guide takes the next step: what to check during your spring clean, what you can clean carefully and when to ask for help.

Before you start, record what you find

Take a photograph before cleaning. Note where the mould appears and whether the surface feels damp, shows water staining or has been affected before.

That record becomes useful if the problem returns. In a rental, report leaks, damaged materials and other repair concerns promptly to the landlord or property manager.

For small, accessible patches on suitable washable surfaces, follow the cleaning product’s instructions and the material’s care guidance. Ventilate, use the recommended protection and never mix cleaners.

Widespread growth, flood damage or mould within deteriorating materials needs a different response from an ordinary household wipe-down.

Clean the window frame, not just the glass

A polished pane does little for the damp lower corners around it.

Check the sill, frame, seals and accessible tracks. Wipe away condensation and dry the surface. Use a suitable cleaner as directed for small patches on sound, washable materials, taking care not to soak timber or damage finishes.

Keep designed drainage openings clear according to the window manufacturer’s instructions. Do not seal over them.

Look for swollen timber, peeling paint, recurring staining or water appearing after rain. These are reasons to investigate the window and surrounding building materials. Repeated cleaning will not repair a leak.

Look at the back of your curtains

The side facing the room may look fresh while the side touching the window is damp or stained.

Pull curtains aside and inspect the backs, hems and surrounding wall. Check blinds too, following their manufacturer’s cleaning instructions.

For washable curtains, follow the care label before choosing a wash cycle or whitening product. Delicate lace, linings and older fabric may need special treatment. Remove fittings as instructed and use the permitted drying method.

Allow curtains to dry completely. Open them during the day so air can move around the window, and avoid leaving fabric pressed against wet glass.

Move the bed and sofa

Exterior walls and corners behind large furniture deserve a closer look.

Move furniture safely and inspect the wall, skirting and furniture itself. Check for damp patches, staining and a musty smell.

Clean suitable washable surfaces carefully. Mould within upholstery or damaged plasterboard should not be treated as a quick surface-cleaning job.

When furniture goes back, leave space for airflow. Tenancy Services recommends moving beds and furniture away from walls as part of managing dampness.

Empty the wardrobe corners

Check the lower shelves, back wall, shoes and bags that have spent winter tucked away.

Follow care instructions for affected belongings, and dry cleaned shelves before putting items back. Clothing should be completely dry before storage.

Avoid packing everything tightly against the back wall. A wardrobe that stays damp needs its surrounding conditions checked, rather than another fragrance sachet.

Check bathrooms and extractor covers

Look around shower edges, behind freestanding items and along the bottom of the shower curtain.

Wash suitable shower curtains according to their care labels. Clean accessible extractor covers only as the manufacturer permits, with the unit safely switched off. Leave electrical components alone.

Check that the extractor fan actually operates, rather than only cleaning its cover. Use available extraction when bathing or cooking. A clean grille does not establish that the fan or duct is working properly. Report equipment faults so they can be investigated.

Open the cupboard under the sink

Empty it enough to see the cabinet base and plumbing connections.

Look for drips, staining, swollen boards and damp items. Check accessible spaces beside appliances without disconnecting plumbing or moving heavy equipment unsafely.

If the cupboard is wet, address the leak as well as the cleaning. Putting belongings back against a damp cabinet hides the problem again.

Check whether the clean worked

Return to the affected areas after cleaning and drying. Compare them with your photographs.

Do the surfaces stay dry? Does staining or growth return? Does the problem follow rain, cold nights or use of the bathroom?

Tenancy Services recommends wiping condensation, using ventilation and extraction, and putting washing away only when dry. It also advises raising persistent dampness with the landlord, because hidden moisture sources may need investigation.

When to speak with Steve

Ask for further advice when mould keeps returning, spreads across a large area, follows flooding or appears alongside damaged materials or an active leak.

Not every visible patch needs laboratory testing. The useful next step depends on the property conditions and the question that needs answering.

If your spring clean uncovers a recurring mould problem, contact Steve at NZ Healthy Homes to discuss whether further assessment or testing would help.