How to make a TV antenna last twice as long in Bunbury
A standard aluminium antenna within 2 km of the water here is finished in 5 to 7 years. A marine-grade head on 316 stainless fixings, with gel-filled connectors and a sealed roof penetration, will do 10 to 12 for about $120 more at installation. The gap is not luck. It is four habits: check it from the ground after every big blow, keep the signal path and the gutter clear, have the connections re-weatherproofed yearly, and replace the masthead amplifier before it dies rather than after. Averaged out, that is about $80 a year.
What is actually attacking your antenna in the South West
Every region has one enemy that dominates. On the Bunbury coast it is salt, and everything else is a supporting act.
Salt aerosol
Bunbury sits on a narrow strip between the Indian Ocean, Koombana Bay and the Leschenault Estuary, so a large share of the housing here, from the CBD and the beachfront streets through to Dalyellup and the estuary side of Australind, falls inside what the Australian standard on atmospheric corrosivity describes as a severe marine zone. That is not a marketing line, it is a design category, and it is why a builder-grade antenna does not last. Airborne salt settles on the aluminium elements and the plated steel fixings, holds moisture against the metal overnight, and turns the joint between two dissimilar metals into a small battery. A zinc-plated U-bolt clamped to an aluminium mast in that air is corroding from the day it goes up.
Water, arriving in winter
Bunbury takes roughly 700 mm of rain a year and most of it lands between May and September, driven sideways by the fronts that come off the ocean. Salt opens the corroded connector, and winter drives water into it. From there the water travels along the inside of the coax by capillary action, corroding the copper as it goes, which is why a fault that started at the antenna head shows up as a dead wall plate six metres away.
Wind, UV and tree litter
Those same winter fronts bring the gusts that put masts over. Summer brings sustained high UV that makes cheap outdoor cable jacket chalky and brittle within a few years, and a brittle jacket cracks at the first bend. On the treed blocks toward Gelorup and the outer edge of Dalyellup, tuart and peppermint growth pushes into the signal path a metre or two a year, and the leaf litter that collects in the gutter under the mast holds water permanently against the bracket.
Two things that are not faults
Break-up on still, hot summer evenings is usually atmospheric ducting letting distant transmitters interfere, and it clears with the weather. Sudden interference on some channels after a network upgrade nearby can be mobile-band overload at the masthead amplifier, which a $40 to $90 filter fixes. Neither means the antenna is failing, and neither should be sold to you as a replacement. The signal problems guide goes through how to tell them apart.
The Bunbury coastal antenna maintenance schedule
Grouped by how often it needs doing, with the jobs you can safely do yourself kept separate from the ones that need someone on the roof. Ticks are saved in this browser, so you can work through it over a weekend.
After every big blow: do it yourself, from the ground
After every big blow: get a pro
Every season, four times a year: do it yourself
Every 12 months on a coastal block: get a pro
Every 3 to 5 years: get a pro
Every 10 to 15 years, or 6 to 10 on the beachfront: get a pro
Never do these: they cost money or void the warranty
Service life you should actually expect
Two houses, one 400 metres from the surf at Dalyellup and one 8 km inland at Eaton, will get completely different lives out of identical hardware. Plan to the right column for your own address.
| Component | Within 2 km of the water | Inland, 5 km or more | Replacement cost |
|---|---|---|---|
| Standard aluminium antenna head | 5 to 7 years | 12 to 15 years | $280 to $450 |
| Marine-grade antenna head | 10 to 12 years | 15 years or more | $340 to $580 |
| Plated steel mast and U-bolts | 4 to 6 years | 10 to 12 years | $120 to $220 |
| 316 stainless fixings | 12 years or more | Effectively the life of the install | $120 to $220 |
| Quad-shield RG6 outdoor run | 8 to 12 years | 12 to 15 years | $180 to $400 |
| Masthead amplifier | 4 to 7 years | 7 to 10 years | $120 to $240 |
| Roof penetration seal | 3 to 5 years before it needs attention | 5 to 8 years | $130 to $280 |
Realistic 2026 figures for the Bunbury area. Full price list on the pricing page, and the age triggers for replacement are on the replacement timing guide.
What neglect costs, with real numbers
- An unsealed connector. Sealing it correctly at installation costs nothing extra. Left open, water tracks down the coax and the repair becomes $280, and by the time it has corroded the head, $580. The same fault, three prices, decided by five minutes of work at the start.
- A loose mast through one winter. A $180 to $320 make-safe becomes broken tiles, a wet ceiling and insulation replacement at $2,000 to $3,000, and most of it will not be covered because an insurer will call a corroded mount wear and tear. The insurance claim page explains that argument in detail.
- Skipping the yearly check on a coastal block. A $130 to $180 service that re-weatherproofs the connections roughly doubles the life of a $580 antenna. Over twelve years that is a $580 saving against $1,800 of service visits, which sounds like a loss until you add the two $280 repairs and the wasted evenings you avoided.
- Letting the tree win. Two years of unchecked growth on a Gelorup block turns a working antenna into a fringe one, and the usual response is to buy a bigger antenna at $450 to $750. An afternoon with a pole saw would have been free.
- Running an amplifier past its life. An amplifier that is drifting rather than dead produces intermittent break-up that gets blamed on everything else, and people commonly spend $300 on diagnosis before replacing a $120 part. If it is over five years old on the coast, replace it and move on.
The honest bit: when you do not need us
- If you are more than about 5 km from salt water, an annual service is overkill. Every 2 to 3 years is genuinely enough for most of Eaton and the inland side of Australind, and we will say that on the phone rather than sell you a schedule you do not need.
- If the antenna is under 5 years old, marine grade and stable on every channel, leave it alone. Do the seasonal ground checks yourself and book us when something changes.
- If your picture only fails on hot still nights, that is atmospheric, not mechanical. Nothing we replace will change it.
- If you are about to sell, spend the money on the visible defects rather than a maintenance plan. The pre-sale page has the straight verdicts on what is worth doing.
- What we do not do: roof plumbing, tile replacement, electrical work behind the switchboard, or satellite subscription services. If your antenna problem is really a roof problem, we will tell you and stop there.
One last thing worth knowing about warranties. Our workmanship warranty runs 5 years, and manufacturer warranties on quality antenna hardware are commonly in the same range, but almost every one of them excludes corrosion where a non-marine product was installed in a marine environment. On a Dalyellup or beachfront Bunbury roof, fitting the cheaper head does not just shorten the life, it removes the warranty you thought you were buying. That is the single most useful thing on this page. If you want the detail on what a compliant, properly earthed and weatherproofed install involves, the standards and compliance page covers it, and antenna repairs covers what a service visit includes.
Frequently asked questions
How long should a TV antenna last in Bunbury?
What actually kills antennas in Bunbury?
Is an annual antenna service worth $130?
What voids an antenna manufacturer warranty?
What does neglect actually cost?
Can I do any of this myself?
Put your antenna on a schedule instead of a callout list
Tell us your suburb and roughly how old the antenna is, and you will have a fixed price for the annual service, plus an honest opinion on whether you need one, within one business day.
Living within sight of the water in the South West?
Marine-grade hardware, 316 stainless fixings, sealed connections and a 5-year workmanship warranty.