How to Winterize Your Home: An Autumn Checklist

Winter problems at home rarely arrive out of nowhere. A frozen pipe, a boiler that won't fire, a gutter that overflows down the wall or a draught that makes the home office unbearable usually start as small autumn jobs nobody got round to. Running a business from home and juggling family life, I've learned that an hour of prevention in October saves days of disruption in January. Here's the checklist, room by room and outside, with the jobs you can do yourself and the ones worth booking a professional for.

The short checklist

Area	Job	When
Heating	Service the boiler or furnace, bleed radiators, test the thermostat	Early autumn, before you need it daily
Pipes	Insulate exposed pipes, find the stopcock, fix drips	Before the first frost
Roof and gutters	Clear gutters and downpipes, check for loose tiles or shingles	After most leaves have fallen
Windows and doors	Seal draughts, check seals, add draught excluders	Before the clocks change
Outside	Drain and store hoses, shut off outdoor taps, clean paths	Before the first frost
Safety	Test smoke and carbon monoxide alarms, sweep the chimney	At the start of the heating season
Emergency kit	Torches, batteries, blankets, phone chargers	Any time before the stormy months

Heating: get it checked before you need it

Book a boiler or furnace service early, before engineers get busy with breakdowns. A service checks safety as well as efficiency, and it's the best way to avoid a cold house on the first freezing night. While you wait, do the simple jobs yourself:

• Bleed radiators that are cold at the top, then check the boiler pressure is back in the normal range shown in the manual.
• Test the thermostat and timer, and set the heating to come on before you get up rather than running all day.
• Clear furniture and long curtains away from radiators so the heat reaches the room.
• If you have a heat pump, check the outdoor unit is free of leaves and has space around it.
• Replace or clean filters on warm-air systems, as the manufacturer recommends.

Pipes and water: prevent freezing

Burst pipes are one of the most disruptive winter problems because water spreads quickly and damage can be hidden. Prevention takes little effort and makes a big difference.

1. Find your stopcock or main shut-off valve and make sure everyone in the house knows how to find it.
2. Check it turns. Stiff valves seize when you need them most.
3. Insulate pipes in lofts, garages, cellars and on outside walls with foam lagging.
4. Fix dripping taps and overflow pipes, because a constant drip can freeze and block.
5. Disconnect garden hoses, shut off outdoor taps from inside if you can, and drain them.
6. If you go away, leave the heating on a low setting so the pipes don't freeze.

Roof, gutters and drains

Blocked gutters are behind a surprising amount of winter damp. When water can't flow away, it spills down walls, soaks brickwork and finds its way inside. Clear leaves and moss from gutters and downpipes once most leaves have fallen, check joints for leaks and make sure downpipes discharge away from the walls. From the ground, look at the roof with binoculars for slipped tiles, cracked flashing or loose shingles. Anything you can't safely reach is a job for a roofer, not a ladder on a windy day.

All those leaves and branches have to go somewhere, and my guide on how to get rid of garden waste covers green bins, composting and the other options.

Windows, doors and draughts

• Hold your hand near frames, letterboxes, keyholes and skirting boards on a windy day to find draughts.
• Add self-adhesive draught strips to doors and opening windows.
• Fit a brush or flap to the letterbox and a draught excluder at the bottom of doors.
• Check the sealant around window frames and replace cracked or missing sections.
• Use thermal or lined curtains and close them at dusk.
• Don't block air bricks or trickle vents. Homes need some ventilation to prevent condensation and mould.

Insulation and the home office

If you work from home, winter shows up the weak spots fast. A cold spare room turned office is uncomfortable, and heating the whole house to keep one room warm is wasteful. Check the loft insulation is thick and evenly spread, add a rug over bare floorboards, fit a draught excluder to the office door and position your desk away from the coldest window. A heated throw or a small, thermostatically controlled heater for the room you're using often makes more sense than raising the whole house temperature.

Outside: paths, garden and storage

1. Clean patios and paths before winter so algae and leaf stains don't make them slippery. My guide on how to clean a patio covers the right method for each surface.
2. Store or cover garden furniture, cushions and the barbecue.
3. Empty and store pots that crack in frost, or lift them onto pot feet.
4. Trim branches that could hit the house, the roof or power lines in a storm.
5. Check outside lights, and consider motion lights for dark evenings.

Dark evenings are also when many people think about home security. My home security camera guide explains how to choose one by the way you live and what to check about privacy and storage.

Safety checks

• Test smoke alarms and carbon monoxide alarms, and replace batteries or units as the manufacturer advises.
• Have chimneys and flues swept before you light the first fire of the season.
• Keep a fire extinguisher or fire blanket in the kitchen and know how to use it.
• Make sure gas appliances are serviced by a qualified engineer.
• Plan how you'd keep everyone warm if the power went off.

Build a simple winter emergency kit

Storms and power cuts are rare for most of us, but a small kit takes the panic out of them. Keep it in one box that everyone can find: torches and spare batteries, a charged power bank, candles and matches stored safely, warm blankets, bottled water, a few days of easy food, a first aid kit, any regular medicines and a list of useful phone numbers on paper. If you have pets, add their food and anything they need too.

If you're going away over winter

• Leave the heating on a low setting and ask a neighbour to check in.
• Turn off the water at the stopcock if the house will be empty for a long time, and drain the system if advised.
• Set timers on a couple of lights.
• Clear gutters and secure anything loose outside before you leave.
• Tell your insurer if the house will be empty for an extended period, as policies often have conditions about unoccupied homes.

Do it once, then keep it simple

Most of this list only needs doing thoroughly once. After that, it's a quick annual check: service the heating, clear the gutters, test the alarms and walk round the house looking for draughts. If you're also planning bigger projects, my guide to home improvements that add value explains which upgrades are worth doing first.

If you're a heating engineer, roofer or home maintenance expert with seasonal advice homeowners need, have a look at contributing a home improvement article.

Frequently asked questions

What does it mean to winterize a house?

It means preparing your home for cold weather: servicing the heating, protecting pipes from freezing, sealing draughts, clearing gutters and getting the outside ready for frost and storms.

When should I start winterizing my home?

Early to mid autumn is ideal, before the first frost and before heating engineers and roofers get busy.

How do I stop my pipes freezing?

Insulate exposed pipes, fix drips, shut off and drain outdoor taps, know where your stopcock is and keep the heating on low if you go away.

What is the most important winter home job?

A heating service and protecting your pipes come first, because a broken boiler or a burst pipe causes the most disruption.

Should I close air vents to keep heat in?

No. Air bricks and trickle vents help prevent condensation and mould. Seal draughts around doors and windows instead.