Every winter the same thing happens in British houses. The temperature drops properly for the first time in late November, several hundred thousand people discover simultaneously that their boiler will not fire, and the wait for an engineer stretches to a fortnight. Almost none of it is bad luck. October home maintenance exists because the cheap window to fix things is now, while trades still have diary space and the weather still lets you get up a ladder.
The October list is short: clear the water off the building, prove the heating works before you need it, stop the draughts, and book the two or three trades who will be unavailable in December. Everything else can wait until spring.
First: get water off the building
Autumn damage is almost always water that could not get away. Leaves fill gutters, gutters overflow, water runs down the wall instead of down the pipe, and by February you have a damp patch that needs a surveyor rather than a ladder.
Gutters, downpipes and gullies
Clear the gutters after the bulk of the leaves have come down - which in most of the UK means late October rather than early. Run a hose or a bucket of water along the run and watch where it goes. You are looking for standing water, joints that drip, and brackets that have pulled away.
Then check the ground-level gullies at the base of each downpipe. A blocked gully quietly discharges rainwater against the base of the wall, which is a very common cause of low-level damp that people spend years blaming on rising damp.
Roof, flashing and the flat bits
You do not need to go on the roof. From the ground with binoculars or a phone camera at full zoom, look for slipped or missing slates, cracked cement fillets where the roof meets a wall or chimney, and any ridge tiles sitting at an angle. On flat roofs and dormers, look for ponding and for splits at the upstand.
Outside taps and exposed pipework
Isolate and drain the outside tap before the first frost, and lag any pipework in the loft, the garage or an unheated utility. A burst pipe in an unheated space is the single most destructive thing that happens to British houses in winter, and lagging is the cheapest insurance you will ever buy.
Second: prove the heating works
Turn the heating on for an hour now, in daylight, while the house is warm enough that a failure is an inconvenience rather than an emergency. Listen to the boiler, check the pressure gauge, and walk round every radiator with your hand.
Cold at the top means air, and bleeding fixes it. Cold at the bottom with a hot top usually means sludge, which does not fix itself and eventually takes the pump with it. Cold everywhere with a hot boiler is usually a valve or a pump.
If your annual gas service is due, book it now. An annual service by a Gas Safe registered engineer is also the moment to have your carbon monoxide alarm checked - and if you burn solid fuel or oil, October is when the chimney sweep and the OFTEC technician still have availability.
The most expensive mistake homeowners make in autumn is treating the boiler service as an optional annual bill rather than the thing that keeps the warranty alive. Most manufacturer warranties require a documented annual service, and the paperwork is what they ask for when you claim. No certificate, no warranty - and that conversation always happens in January, at the worst possible moment.
Third: deal with the draughts
Draught-proofing is the highest-return job in the autumn calendar because it is cheap, quick and immediately noticeable.
Letterbox, keyhole and door edges. Brush seals and self-adhesive strip, fitted in an afternoon.
Loft hatch. Insulated and sealed. A bare hatch is a hole in the middle of your insulation.
Floorboards and skirtings. Gap filler at the board-to-skirting junction in older houses.
Unused chimneys. A chimney balloon or sheep’s wool draught excluder, provided the flue is genuinely disused and any appliance is properly capped and ventilated.
Window and door seals. Check the rubber gaskets on uPVC units for perishing, and the trickle vents for being painted shut.
What you should not do is seal a house airtight. Ventilation is what stops condensation, and condensation is what causes most of the mould people report in January. Draught-proof the uncontrolled gaps, keep the deliberate vents working.
Fourth: book the trades who disappear
Some trades are effectively unbookable in December because everyone calls them at once. If any of these apply to you, get them in the diary in October:
Gas Safe engineer for the annual boiler service
Chimney sweep, if you use an open fire or a wood burner
Roofer, for anything you spotted from the ground
Drainage contractor, if the gullies or the soil stack were slow all summer
Electrician, if your EICR is more than about ten years old or the RCD has been tripping
What to do in the next 30 minutes
Turn the heating on for an hour and walk round every radiator.
Find the boiler service certificate and check the date on it.
Look out of an upstairs window at your gutters and photograph anything full of leaves.
Press the test button on every smoke and carbon monoxide alarm in the house.
Find your stopcock, check it actually turns, and make sure everyone in the house knows where it is.
Set the October list to repeat each year so you are not rebuilding it from memory every autumn - save the October list to Home+, keep the service certificates and warranty documents against the property, and let the reminders arrive before the trades get busy rather than after.
FAQ
When exactly should I clear my gutters? After the bulk of the leaves have fallen, which in most of the UK means late October to mid-November. If you have a large deciduous tree close to the house, clearing twice - once in autumn and once in early winter - is more realistic than once.
Should I leave the heating on low all winter to stop pipes freezing? During a sustained cold snap, keeping a low background temperature reduces the risk of pipes freezing, particularly in properties left empty. For an occupied, reasonably insulated house, well-set timed heating is usually the more efficient approach. Lagging the vulnerable pipework matters more than either.
Is an annual boiler service really necessary? For gas safety it is strongly recommended, and for most manufacturer warranties it is a condition rather than a suggestion. Keep the certificate - it is what gets asked for when something fails.
My radiators are cold at the bottom but hot at the top. Is bleeding them enough? No. Air collects at the top, so a cold top is an air problem. A cold bottom with a hot top usually indicates sludge build-up, which needs a power flush or chemical clean by a heating engineer.
Will draught-proofing cause condensation and mould? It can, if you seal deliberate ventilation. Draught-proof the uncontrolled gaps around doors, hatches and floorboards, but leave trickle vents, extractor fans and airbricks working.
What is the one job most people skip? Checking the outside gullies at the base of downpipes. It takes two minutes, costs nothing, and a blocked one quietly soaks the base of the wall all winter.
