The Cheapest Repair Is the One You Do Early

Almost every large domestic repair bill has the same shape: something small let water in, or something small was left loose, and nothing appeared to happen for a long time. A blocked gutter is a five-minute job; the same gutter left for three winters is a damp wall, a rotten window sill, and a decorating job.

The following routine takes a couple of hours a season and is not remotely comprehensive — it is the short list of checks that catch the expensive failures.

Spring

Look at the roof from the ground, with binoculars if you have them. Slipped or missing tiles, damaged ridge mortar, anything growing. You are not going up there; you are noting whether someone should.

Clear gutters and downpipes and then, importantly, run water through them and watch. Water going over the front edge means a blockage or a gutter that has sagged out of fall. Water running down the wall behind the gutter means a broken bracket or a missing seal at a joint. Both are cheap now.

Walk the outside of the building slowly. Cracked render, failed pointing between bricks, gaps in sealant around window and door frames, paint failing on timber. Small gaps are how water starts getting in, and sealant and paint are inexpensive.

Check that external ground level is well below the damp-proof course — usually a visible line in the brickwork a couple of courses up. Soil, decking, or a raised patio bridging it is a genuine and very common cause of damp.

Summer

Service what has a filter. Extractor fan grilles, tumble dryer lint traps, cooker hood filters, and the outdoor unit of any air conditioning. Blocked filters make appliances work harder and fail earlier.

Repaint or re-oil exterior timber while it is dry — fascias, sheds, gates, window frames.

Check outside taps and hoses for leaks, and look at where water actually goes when it leaves a downpipe. A drain that discharges against a wall is doing quiet damage.

Test smoke alarms and carbon monoxide alarms, and replace batteries whether or not they are complaining. Replace the units themselves at the interval printed on them — typically ten years for smoke alarms and often less for CO alarms, after which the sensor is unreliable even though the test button still beeps.

Autumn

Clear gutters again, after leaf fall. This is the one that gets skipped and the one that matters most.

Bleed radiators if they are cold at the top and warm at the bottom, and check the system pressure gauge against the manufacturer’s marked range afterwards.

Check draughts — around doors, letterboxes, loft hatches, and floorboards. Draught excluder strip is the cheapest possible improvement to a house’s comfort and heating bill.

Look in the loft, on a bright day, with the light off. Daylight where there should not be daylight is a hole. Also check insulation coverage and that ventilation at the eaves is not blocked by it, because sealed lofts get condensation.

Know where the stopcock is and turn it — half a turn each way once a year is enough to stop it seizing.

Winter

Protect against freezing: lag exposed pipes in lofts, garages, and outbuildings; isolate and drain outside taps in cold climates.

Watch for condensation and mould, which are ventilation problems far more often than they are leaks. Run extractor fans during and for a while after showering and cooking, keep furniture a little off external walls, and dry washing outdoors or in a ventilated room rather than on radiators in a closed one.

After storms, look at the roof and fences again from the ground.

The Jobs That Are Not DIY Jobs

There is no shame in the list below, and the reasoning is not squeamishness. In many countries these are legally regulated activities, work carried out on them without certification can invalidate home insurance and complicate a future sale, and the failure modes are fire, explosion, electrocution, or collapse rather than an untidy result.

Anything gas. Boilers, gas hobs, gas fires, gas meters, and the pipework connecting them. In most jurisdictions only a registered engineer may legally work on gas appliances. Carbon monoxide from badly fitted or unserviced gas appliances kills people every year, and it gives no warning at all. If you smell gas: no switches, no flames, open windows, shut off at the meter if you safely can, get out, and call the emergency number for your gas network from outside.

Mains electrical work beyond the minor. What is permitted for a homeowner varies enormously — some places allow like-for-like replacement of a socket or a light fitting, others require certification for almost anything, and additions in kitchens, bathrooms, or outdoors are commonly restricted everywhere. Consumer units, new circuits, rewiring, and anything outdoors or in a bathroom belong to a qualified electrician. If breakers trip repeatedly, that is a circuit telling you something is wrong; repeatedly resetting it is not a fix.

Structural work. Removing or notching walls, cutting joists, altering roof timbers, underpinning. Whether a wall is load-bearing is not reliably determined by knocking on it, and the professional opinion costs a fraction of what getting it wrong does.

Roofs, at height. Falls from ladders are one of the leading causes of serious domestic injury. A roofer with a tower and the right equipment is doing a different job from a person on a ladder with one hand free.

Asbestos-era materials. Homes built or refurbished before asbestos was banned in your country may contain it in artex ceilings, insulation board, floor tiles, pipe lagging, and cement roofing sheets. It is generally harmless while undisturbed and dangerous when drilled, sanded, or broken. If a property is of that era and you are about to disturb something you cannot identify, stop and have it tested.

Anything under warranty, where a DIY attempt voids the cover, and anything in a rented home, where alterations are usually your landlord’s responsibility and often prohibited by the tenancy agreement.

How to Hire Well

When the job does need a trade, the process that works: get three quotes in writing, and be suspicious of the outlier in both directions. Ask for the licence or registration number where the trade is regulated, and check it against the register rather than taking the card at face value. Ask for references from work done a year ago, not last week — the interesting question is how it aged.

Insist that the quote states what is included, what is excluded, and what happens if something unexpected is found behind the wall, because something usually is. Avoid paying large sums up front; staged payments against completed work are normal, full payment in advance is not.

And keep the paperwork. Certificates, guarantees, and receipts for regulated work are exactly what gets asked for when a property is sold, and reconstructing them years later is close to impossible.