Looking after a bathroom on the Coast.

Nobody hands you a service manual with a new bathroom, which is odd given it is the most water-stressed room in the house. So here is ours. It is short, most of it is free, and it is the difference between a room that lasts 25 years and one that quietly dies at 12.

• Every use: Run the fan for fifteen to twenty minutes after the shower stops. Squeegee the screen. Leave the door open.
• Monthly: Look at the silicone at the shower base. Thirty seconds. You are checking for black growth inside the bead and any lifting at the edges.
• Every six months: Clear the floor waste grate. Wipe out the shower screen bottom track and clear its drainage holes, which block with soap scum and then hold water against the frame. Vacuum the exhaust fan grille, because a choked fan is a decoration.
• Yearly: Open the vanity and look at the flexible hoses and the trap, checking for green or white crusting, damp chipboard, or a hose gone stiff. Re-seal natural stone if you have it.
• Every three to five years: Replace the silicone. Not clean it. Replace it.
• Every five years: Have a licensed plumber replace the flexible connection hoses.
• Every five to ten years: Re-grout as needed, particularly the floor-to-wall junction.

Ventilation is not optional here.

If you take one thing from this page, take this one. Devonport gets just under 1,000 millimetres of rain a year in a cool maritime climate, our 9am winter humidity regularly sits above 80 per cent, and July maximums are around 12 to 13 degrees. A bathroom in Sydney dries itself between uses. A bathroom here in July does not. Wet at 7am, still damp at 5pm, wet again at 7pm, for five months.

So the fan does work here it does not have to do on the mainland. Three things matter. It must be ducted to outside, not into the roof space, because a fan dumping moist air into your roof is not solving a problem, it is relocating it somewhere you cannot see. It must be sized for the room. And it must run on after the shower stops. A run-on timer costs very little and does more for a Devonport bathroom than any product you can buy at a hardware store.

It is also why electric underfloor heating at $900 to $2,200 earns its keep here in a way it never would in Queensland. It is not a luxury on this coast, it is a drying system that happens to feel nice. Half the winter mould we are called out to look at, described as a leak, is really a ventilation problem, as our warning signs page explains.

Silicone: the $200 job that saves $30,000.

Silicone has a working life of three to five years and it protects a membrane with a working life of twenty-five. That ratio is the entire argument. In our damp air it almost always moulds through before it splits, which is what makes it deceptive. The mould grows inside the bead, not on it, so cleaning the surface is cosmetic and bleach changes nothing. The only real fix is to cut the old bead out, clean and dry the joint, and lay a new one. Do that every four years and your membrane is never tested at its weakest points. Skip it for fifteen and you buy a $20,000 to $32,000 renovation early. We have run that arithmetic on our bathroom lifespan page, and it comes out around 45 to 1.

The flexi hose nobody looks at.

Under your vanity, two braided flexible hoses connect your mixer to the water supply. They are the single most likely thing in your bathroom to ruin your week. Unlike a shower leak they fail suddenly, usually overnight, and a burst flexi hose is one of the most common household water damage claims in the country.

They carry a date stamp. Go and look at yours. If it is older than about five years, or you cannot find a date at all, have a licensed plumber swap them. Small job on a scheduled visit, enormous one at 2am. This is also the rare bathroom failure home insurance genuinely does cover, being sudden and accidental, which we cover on our water damage claims page. Better still not to test it.

What to seal, and what not to clean with.

Porcelain and ceramic tiles never need sealing. Natural stone does, every one to two years, or it will stain and etch, and stone is also why acidic cleaners stay out of the room. Grout takes a penetrating sealer well, but know what that buys you: sealer slows staining, it does not replace grout that has eroded away. Never put a polish or wax on a slip-rated floor tile either, because you will destroy the exact slip resistance the tile was specified to AS 4586 to provide, which matters enormously in an accessible bathroom where the whole design intent is not falling over.

Salt, if you are near the water.

Bass Strait air carries salt a fair way inland, and it shows up in bathrooms through East Devonport, Port Sorell, Shearwater and Hawley Beach in ways it never does in Launceston. It pits budget chrome, spots poorly sealed mirror backing and rusts mild-steel fixings. The maintenance answer is dull: rinse and dry tapware rather than letting salt residue sit on it. The build answer is better: specify decent fixtures and stainless fixings up front, because the labour to replace a corroded fitting costs more than the upgrade would have.

Maintenance versus warranty.

We will be straight about the line, because it saves an awkward conversation later. Workmanship is warranted, and fixtures and tiling carry their manufacturer warranties, all set out in your written quote. What is not a warranty claim is a consumable reaching the end of its life: mouldy silicone at year four is silicone doing what silicone does, and the same goes for a worn tapware cartridge or a perished screen seal. A membrane that leaks at year four, on the other hand, is absolutely our problem and we would want to know immediately. The difference is whether the thing failed early or simply ran out.

A worked example.

A 2006 home in Ulverstone, main bathroom and laundry, owners who actually did the list. Across twenty years: four re-silicones at roughly $200 each, two re-grouts at about $900 each, four sets of flexi hoses at about $220 each, and a run-on timer fitted early. Call it $3,500 across two decades, or roughly $175 a year.

The room is now twenty years old, the membrane has never been tested at a failed joint, the floor is solid, and when they renovate it will be because they want to, not because they have to. The identical house three streets over, no maintenance at all, was a $28,000 full strip-out at year fourteen. That is the whole page in one comparison: $175 a year, or a bathroom fifteen years early.