UK home guides · updated for winter 2026

Home problems,
solved wisely.

Straight answers for damp, mould, boilers and energy bills in UK homes: what’s wrong, what it costs, and whether you can fix it yourself.

Popular: Mould on ceiling Wet windows Low boiler pressure Vaillant F22 Reset Worcester boiler Heated airers

1Mould on the ceiling 2Wet windows 3Cold rooms 4Boiler pressure 5Heat escaping

UK homes only UK prices, regulations & grants
Safety-first Clear Gas Safe guidance
Real costs Prices checked quarterly
Primary sources Manuals, gov.uk, Ofgem

Browse by problem

What’s going on in your home?

All guides

Damp & Mould Black mould, condensation, dehumidifiers and every type of damp. Mould on ceilingsWet windowsRising damp Explore Heating & Boilers Boiler pressure, fault codes, radiators, thermostats and heat pumps. Low pressureFault codesCold radiators Explore Energy Saving What every appliance costs to run, and the cheapest ways to heat and dry. Heater costsDrying clothesEconomy 7 Explore Insulation & EPC Improve your EPC rating with insulation, glazing and grants. EPC ratingsDouble glazingGrants Explore

Interactive · saves on this device

The winter-ready home checklist

Eight jobs that prevent most winter call-outs, mould outbreaks and bill shocks. Tick them off as you go.

0of 8 done

Start with the quick wins: bleed radiators and check boiler pressure.

Bleed the radiatorsCold at the top = trapped air. 10 minutes with a radiator key.How
Check boiler pressure1–1.5 bar when cold. Top up with the filling loop.How
Book the boiler serviceAnnual Gas Safe service keeps it safe and the warranty valid.Why
Open trickle vents & test fansThe cheapest way to stop condensation before it starts.How
Treat any mould earlySmall patches clean up in minutes. Big ones mean a bigger cause.How
Plan for drying washingA dehumidifier dries clothes for ~30p and stops wet windows.How
Check loft insulation depthAim for about 270 mm, right to the edges.How
Seal the draughtsDoors, letterbox, floorboards: the cheapest saving there is.How

Essential this winter

The fixes UK homes need right now

Heating

How to Reset a Worcester Boiler (and What a Flashing Blue Light Means)

How to reset a Worcester Bosch boiler on every popular Greenstar model, what a flashing blue light means, and what to do when the reset doesn’t work.

Try it now

What does it really cost to run?

Pick an appliance and how long you use it. We’ll show the cost per hour, day, month and year at current UK energy prices.

20+ appliances, or enter any wattage
Updated every Ofgem price cap
Radiator BTU calculator too

All free calculators

Appliance running cost calculator

Appliance Power (watts) Hours per day Days per week Electricity price (p/kWh)

–per hour

–per day

–per month

–per year

– · Default price: Ofgem price cap average, 1 Oct–31 Dec 2026. Check your bill for your exact unit rate.

Fresh from the editor

Latest guides

See all

Heating

How to Reset a Worcester Boiler (and What a Flashing Blue Light Means)

How to reset a Worcester Bosch boiler on every popular Greenstar model, what a flashing blue light means,…
Heating

Vaillant F28 Fault Code: Boiler Not Firing Up? Here’s the Fix

F28 means your Vaillant boiler tried to light and failed. The common causes, from no gas to a…
Heating

Vaillant F22 Fault Code: What It Means and How to Fix It

F22 on a Vaillant boiler means there isn’t enough water pressure in the system. Here’s how to top…
Heating

Vaillant Boiler Fault Codes: Complete List (F22, F28, F75 and More)

Every common Vaillant fault code in one place: what it means, whether you can fix it yourself, and…
Damp & Mould

Rising Damp: Signs, Causes, Treatment Cost and Whether You Really Have It

Real rising damp is much rarer than damp-proofing salespeople suggest. How to tell the signs apart, what causes…
Heating

What Does L2 Mean on a Boiler? Ignition Lockout Explained

L2 means your boiler tried to light and failed. The usual causes, from a frozen condensate pipe to…

01

Diagnose first

Most “damp” in UK homes is condensation. We help you find the real cause before you spend money.

02

Honest about DIY

What you can safely fix yourself, and exactly when you need a Gas Safe engineer, electrician or surveyor.

03

Kept up to date

Costs and energy prices re-checked every quarter. Every guide shows its last update. How we work

Home problems,solved wisely.