Bathroom Renovation for a Holiday Home or Rental in Istria

A bathroom in a holiday home works harder than the one in your main house. In July and August it may be used by six guests a day, then it sits closed and unheated for months. Add the hard Istrian water, salty air near the coast and humid summer nights, and you can see why bathrooms are where most rental complaints and most repair calls start.

This guide is about planning a bathroom that copes with all of that: what to choose, what to hide in the wall, and the details that save you a phone call from a guest in the middle of the season.

Start with how the bathroom will really be used

Before choosing tiles, answer a few plain questions. How many people sleep in the house at full occupancy? Is this the only bathroom, or one of several? Will guests arrive straight from the beach with sand on their feet? Is the house closed in winter, or let all year? The answers decide the size of the water heater, whether you need a second washbasin, and how robust every surface must be.

• One bathroom per two bedrooms is a sensible target for a rental. Where that is impossible, a separate WC or a second basin in the bedroom area takes pressure off the morning queue.
• Water heater size. A small electric heater that is fine for a couple will run cold with a family of five showering one after another. Ask your plumber to size it for full occupancy, or consider a second unit for a separate bathroom.
• Winter use. If the house stays closed, plan for easy draining of pipes and the heater, and shut-off valves that you or a caretaker can actually reach.

Waterproofing: the part nobody sees

Most leaks in rental bathrooms do not come from burst pipes. They come from water seeping through grout and tile joints over years, into the screed and the wall behind. In an apartment block it ends up in the neighbour's ceiling below; in a stone house it feeds damp in walls that are already hard to dry.

The answer is a proper waterproofing layer under the tiles, not just good grout. In practice that means a liquid or sheet membrane on the shower floor and walls, sealing tape in every corner and around pipes, and a sealed collar where the drain meets the membrane. Many tradesmen also treat the whole bathroom floor, not only the shower area, which is a good idea where guests splash water everywhere.

Where walls or ceilings are built in drywall, use moisture-resistant boards made for bathrooms and still waterproof the wet zones. Our drywall team often uses these boards to box in pipes, build a niche or lower a ceiling to hide an extractor duct.

Materials that survive guests and hard water

Istrian tap water is generally hard, because it comes from limestone ground. Limescale is the main enemy of anything shiny. Choose materials that are easy to wipe and do not show every drop.

• Porcelain stoneware tiles rather than softer ceramic or polished natural stone. Matt or lightly textured finishes hide water marks; on the floor, choose a slip-resistant surface, as wet feet and smooth tiles are a classic holiday accident.
• Large-format tiles mean fewer joints to clean. They need a flat substrate and careful laying, often with a levelling system.
• Grout. Epoxy or high-quality stain-resistant grout in the shower stays clean much longer than standard cement grout. A mid-grey or beige shade forgives more than bright white.
• Fittings. Simple, solid taps and shower sets with replaceable cartridges and anti-limescale nozzles. A thermostatic shower mixer protects guests, especially children, from sudden hot water.
• Wall-hung WC and vanity. They make floor cleaning fast between guests. The concealed cistern frame must have an access panel, so plan where the flush plate goes.

A shower is almost always better than a bath in a rental. A walk-in shower with a fixed glass panel and a linear drain is easy to clean and comfortable for older guests. Build the floor with a real fall towards the drain; a shower tray that holds water in one corner will become a cleaning problem by August. For tile choice and laying quality see our tiling work.

Ventilation and mould

Many Istrian apartments have small or windowless bathrooms, and even a bathroom with a window stays humid if guests keep it shut. Mould on silicone joints and ceiling corners is a common complaint in reviews.

• Fit a quiet extractor fan with a run-on timer or a humidity sensor, so it keeps working after the guest leaves the room.
• Duct it to the outside, not into a closed ceiling void.
• Use a mould-resistant paint on the ceiling and any untiled wall, and leave a small gap under the door so fresh air can come in.
• In a house that is closed for the winter, leave interior doors open and consider a dehumidifier on a timer, especially in older stone houses.

Mould in a bathroom inside a stone house can also come from damp walls, not only from showers. If the problem starts at floor level, read our guide on damp in old stone walls before tiling over it.

Details that guests notice

Guests judge a bathroom in seconds. Small things make the difference between a neutral and a positive comment:

• Enough hooks and a shelf in the shower for several people's bottles.
• A good mirror with even light and a socket next to it for a hair dryer, installed by a qualified electrician at a safe distance from water.
• Storage for spare toilet paper and towels, so your cleaning team does not have to bring them each time.
• A shower screen that does not leak onto the floor, and a door that locks.

Timing, cost and working from abroad

A full bathroom renovation usually takes a few weeks from stripping to final silicone, depending on size, drying times of screed and waterproofing, and how quickly fittings arrive. The cost depends on the size, whether pipes and drains are moved, and the level of finishes. For a rough idea, try the free renovation cost calculator, and see how much renovation costs in Istria.

Plan the work for the off-season so the bathroom is finished, dried and cleaned well before the first guests. Many coastal towns limit noisy works in summer; our article on the best time to renovate explains why autumn and winter are usually the sensible window. If you are not in Istria during the works, we send regular photos of each stage, including the hidden ones; see renovating from abroad.

For the complete job, from removing old tiles to plumbing and final fittings, see our bathroom renovation service. Between seasons, our holiday home maintenance can check silicone, fans and drains before guests arrive.