Annual Deep Cleaning in March Is the Single Most Important Maintenance Task

Your wooden terrace’s entire year of UV protection depends on one properly-timed treatment: a deep clean followed by re-oiling in March, before Mallorca’s UV index climbs above 8 in late April. Between May and October, your deck endures daily surface temperatures exceeding 70°C at midday, UV indexes of 8-11, and infrared radiation that breaks down wood lignin at the molecular level. The protective oil layer applied in March is the only thing standing between your wood and this assault.

Use a pH-neutral wood cleaner (never household bleach, ammonia, or acidic products — these destroy wood lignin and strip natural oils) with a soft-bristle brush. Rinse with a garden hose at gentle pressure — never a pressure washer, which forces moisture deep into wood fibers, raises the grain, and strips protective oils. Allow 48 hours of dry weather before applying the first coat of UV-protective penetrating oil. Apply a second coat after 24 hours for maximum protection. Budget approximately 80-120 € annually for DIY maintenance products across a 40 m² terrace, or 350-500 € for professional maintenance service.

Penetrating Oil Protects Wood from Within — Varnish and Lacquer Do Not

We exclusively use UV-protective penetrating oils on every FIJI terrace, and this is not a preference — it is a physics-based necessity for Mediterranean climates. Penetrating oils soak into the wood fibers and protect from within while allowing the wood to breathe. Film-forming products (varnish, lacquer, polyurethane sealers) create a plastic-like layer on top of the wood that inevitably cracks and peels under Mallorca’s daily thermal cycling — the 30°C temperature swing between cool night and blazing afternoon causes the wood and the film coating to expand and contract at different rates, creating fractures within a single season.

For IPE, use oils with high UV inhibitors and a slight pigment to slow the natural silvering process. For treated pine, use oils with additional fungicidal properties. Both products should be water-based for low VOC emissions and environmental safety. Expect to apply approximately 2 liters per 20 m² per treatment. Apply in temperatures between 15°C and 25°C — Mallorca’s March and October mornings are ideal.

The Four Most Common Maintenance Mistakes in Mallorca

After two decades of maintaining terraces across the island, Luis Fernandez identifies four recurring errors that cause premature deck failure:

Mistake one — pressure washing. Despite being widely available for rent on the island, pressure washers destroy wooden decking by forcing water into fibers at high velocity, raising grain, and stripping oils. Use a garden hose with gentle pressure and a soft brush only.

Mistake two — household cleaning products. Bleach, ammonia, and acidic cleaners (including popular terrace cleaning products sold in Mallorca hardware stores) chemically break down wood lignin — the natural polymer that gives wood its strength. Once lignin is damaged, the wood surface becomes brittle and splinters.

Mistake three — neglecting the substructure. Decking boards are visible, but the substructure underneath is where rot begins. Check ventilation gaps annually. Clear accumulated leaves and debris that trap moisture. Inspect batten connections for rust or loosening.

Mistake four — waiting until the wood is visibly damaged. Once wood has greyed, cracked, and splintered from UV exposure, restoration requires sanding back 1-2 mm of surface material — expensive, dusty, and never quite returns to the original beauty. Consistency is cheaper than restoration.

Seasonal Care Keeps Your Terrace Beautiful Year-Round

Spring (March-April): The critical treatment window. Deep clean with pH-neutral cleaner, let dry 48 hours, apply two coats of UV-protective penetrating oil. This builds the protective layer before summer UV assault begins.

Summer (June-August): Monthly gentle rinse with water only (no soap). Inspect for loose boards or raised fasteners caused by thermal expansion. Spot-treat any areas showing premature weathering.

Autumn (October-November): Second deep clean after summer. Lighter oil application focused on high-traffic and fully sun-exposed areas. Clear all drainage gaps and ventilation channels of debris before winter.

Winter (December-February): The ideal season for professional structural inspection. Address any substructure issues while the terrace sees less use. Plan any board replacements for spring installation.

Professional Maintenance Service Saves Time and Prevents Costly Restoration

For most clients, we recommend one professional maintenance visit per year — ideally in March or October — combined with light DIY care between visits. Our maintenance service includes: full deep cleaning, inspection of all boards and substructure components, re-tightening of any loose stainless steel fasteners, professional-grade penetrating oil application, drainage verification, and a written condition report with photos.

For clients who prefer the silver-grey weathered look on IPE, we offer a ‘natural patina’ maintenance plan focused on structural integrity and cleaning without re-oiling. Contact us to schedule your annual maintenance visit or to discuss a customized care plan for your terrace.

Frequently Asked Questions

How often should I oil my wooden terrace in Mallorca?

Annual re-oiling is recommended, ideally in March before summer UV exposure intensifies. IPE can sometimes go 18 months between treatments; treated pine benefits from annual application. High-traffic and fully exposed areas may need spot treatment twice yearly.

Can I pressure wash my wooden deck?

No. Pressure washing forces moisture deep into wood fibers, raises the grain, and strips protective oils. Use a garden hose with gentle pressure and a soft-bristle brush instead.

What causes the silver-grey color on my IPE deck?

The silver-grey patina is a natural UV reaction on un-oiled IPE and does not indicate structural damage. Many clients prefer this weathered look. Annual oiling with UV inhibitors prevents the greying process if you prefer to maintain the rich brown color.