A bathroom can look excellent on handover and still fail if the work behind the tiles is poor. Falls, waterproofing, pipework, ventilation and electrical safety determine whether the room remains reliable. For homes in Orihuela Costa—many of them apartments, holiday properties or villas used seasonally—easy maintenance and controlled humidity matter as much as visual style.
This guide explains how to plan a bathroom within a substantial renovation and what evidence to request before concealed work disappears.
Survey before selecting sanitaryware
Record dimensions, structure, floor build-up, existing soil and waste positions, ventilation route, water pressure and hot-water system. Look for staining, loose tiles, persistent odour, slow drainage, cracked seals and previous patch repairs. These signs do not diagnose the cause, but they identify areas requiring investigation.
In apartments, check service risers, floor construction and common elements. Moving a WC is not simply a design decision: pipe diameter, gradient and connection point can limit the new position. Community rules may govern working hours, debris routes, water shutdowns and interventions affecting shared installations.
Plan a safe, comfortable layout
Good planning provides clear movement, sensible storage and safe access to fittings. Door swings should not trap a person who falls. Towel rails, controls and shelves should be reachable without crossing a wet floor. A walk-in shower needs enough space to contain spray as well as a designed drainage fall.
Future-friendly choices can be discreet:
- a low or level shower threshold where technically feasible;
- reinforcement behind walls for future grab rails;
- lever controls and an accessible shower valve;
- non-slip flooring appropriate to the wet area;
- strong lighting without glare;
- a practical seat or ledge if space permits.
The CTE's official DB-SUA covers safety in use and accessibility. A competent technician should determine the requirements and reasonable solutions for the specific project.
Waterproofing is a complete system
Tile and grout are not the primary waterproofing layer. A robust wet-area system typically coordinates the substrate, membrane, corners, pipe penetrations, drain connection and upstands. Components must be compatible and installed to the manufacturer's instructions.
Key hold points include:
- Substrate stable, clean and correctly formed.
- Drain position and falls checked before waterproofing.
- Corners and penetrations detailed with the specified accessories.
- Membrane continuous and protected from later damage.
- Test or documented inspection completed before tiling.
- Movement and perimeter joints carried through correctly.
Photograph each stage. Once covered, good waterproofing and poor waterproofing can look identical.
Drainage, water and ventilation
The shower floor must direct water to the drain without creating an unsafe slope. The drain capacity, waste route and shower flow rate need to work together. Pipework should be secured, protected and pressure-tested before enclosure. Accessible isolating valves make future maintenance less disruptive.
Ventilation is particularly important when the property may stay closed. An open window can be useful, but it does not automatically replace required mechanical ventilation. Spain's DB-HS Salubridad establishes health-related building requirements including ventilation and protection from moisture. Project-specific design and compliance should be confirmed professionally.
Electrical safety and lighting
Bathrooms contain defined electrical zones and require appropriate equipment, protection and installation. Do not position sockets, switches, heated rails or lighting only for symmetry. A qualified installer must design and certify the work as applicable.
Use layered lighting: even general light, focused mirror light that renders faces clearly, and low-level night lighting if useful. Check the colour appearance of stone and tiles under the actual selected lamps.
Compare materials by performance
| Element | Priorities | Common oversight |
|---|---|---|
| Floor tile | Slip resistance, cleanability, drainage cuts | Choosing a polished finish for a wet floor |
| Wall finish | Water exposure, joints, maintenance | Assuming grout alone is waterproof |
| Vanity | Moisture-resistant construction and service access | Swollen board at floor or basin junctions |
| Shower screen | Safe glass, rigid fixing, replaceable seals | Too short to control spray |
| Brassware | Spare parts, finish durability, accessible isolation | Concealed parts impossible to service |
| Sealants | Correct product, joint size and substrate preparation | Using sealant to hide movement or poor detailing |
Fewer grout lines can simplify cleaning, but large tiles make substrate preparation and forming shower falls more demanding. The right choice depends on dimensions and installer capability.
What affects bathroom cost?
The visible products are only part of the budget. Demolition, waste removal, pipe renewal, electrical work, ventilation, waterproofing, substrate correction, tiling, carpentry and decoration all count. Relocating fixtures usually costs more than replacing them in compatible positions.
Ask quotations to identify:
- sanitaryware and brassware models or allowances;
- extent of wall and floor preparation;
- waterproofing system and test/inspection record;
- pipework and drainage replacement limits;
- ventilation and electrical scope;
- tile format, laying pattern, trims and niches;
- screens, mirrors, furniture, accessories and decoration;
- exclusions, waste and variation procedure.
For whole-project budgeting, use our Orihuela Costa renovation cost guide.
Construction sequence and quality checks
| Stage | Check before proceeding |
|---|---|
| Strip-out | Unexpected damp or damaged substrate investigated |
| First fix | Pipe routes, fixings, valve access and tests recorded |
| Substrate | Flatness, stability and shower falls correct |
| Waterproofing | Membrane, corners, penetrations and drain connection documented |
| Tiling | Setting-out, cuts, joints and falls approved |
| Second fix | Fittings secure, seals neat, electrical certification arranged |
| Handover | Drainage, flow, hot water, extraction and all controls tested |
See the complete renovation timeline for how bathroom work fits with the rest of the property.
Common warning signs at handover
- Water remains in puddles outside the drain.
- The shower screen or door clashes with fittings.
- Silicone bridges a wide or moving gap.
- Access panels cannot be removed.
- The extractor is noisy but airflow is weak.
- Hot and cold controls behave inconsistently.
- Tiles sound hollow across significant areas or edges are poorly aligned.
- No photographs or test records exist for hidden work.
Raise issues before final acceptance and record the agreed remedy.
Frequently asked questions
Is a level-access shower possible in every bathroom?
Not always. Available floor depth, structure and drainage route determine feasibility. A well-designed low threshold is better than a nominally level shower with inadequate falls.
Can tiles be installed over existing tiles?
Sometimes, but only after checking adhesion, flatness, levels, junctions and the consequences for doors and drains. Covering defects without diagnosing them is poor practice.
How long does a bathroom renovation take?
It depends on investigation, service changes, curing times, product lead times and inspections. A short installation promise should never remove necessary drying, testing or waterproofing stages.
Should all pipework be replaced?
The decision should follow condition, material, accessibility and the wider renovation scope. Leaving a weak concealed section behind new finishes can be a false economy.
Build the bathroom as part of a coordinated renovation
HURPOMAR coordinates bathrooms with structure, services, flooring and the rest of a complete refurbishment. Explore our construction and renovation service, view projects or contact HURPOMAR about a substantial property renovation in Orihuela Costa.
This guide is general information. Technical, electrical, ventilation, accessibility and permission requirements must be verified for the specific property and scope.
