Most damp advice quietly assumes you can switch the heating on. Many households cannot, or ration it, and then find black mould on a bedroom wall and are told to heat more. This guide takes the cost seriously. It sets out what GOV.UK says about cold homes and damp, the steps that cost little or nothing, and where official support is signposted.

The short answer

GOV.UK lists unaffordable or inefficient heating and poor insulation among the factors behind damp and mould, and says damp is not a lifestyle choice. Without extra heating, cut the moisture you make, keep air moving and furniture off cold walls, and ask about support. Insulation helps but needs ventilation. A dehumidifier is a long-term option, not a quick fix.

Why a cold home gets damp

GOV.UK guidance describes condensation as the most common type of damp: moisture from cooking, showering and drying laundry condenses on cold surfaces. It lists poor insulation, inefficient or unaffordable heating, and difficulty heating the home among the factors, and says people on low incomes and in fuel poverty are more likely to live in damp homes. It also says blaming damp on lifestyle choices is unreasonable, because normal household tasks produce moisture.

Rung 1: Free, today

Find where the moisture is coming from and where it lands. Look for mould on outside walls, in corners and behind furniture, and note whether a leak or water coming in could be involved, such as a blocked gutter or cracked render, which GOV.UK lists as building defects. Pull wardrobes and beds a little way from outside walls, as GOV.UK suggests leaving gaps behind furniture. Cover pans when cooking, use extractor fans if you have them, and keep internal doors closed while cooking or bathing.

Rung 2: Free to cheap habits

Dry laundry outdoors where you can and open windows periodically, both on GOV.UK guidance. These do not replace fixing the underlying problem, and GOV.UK notes that simply removing surface mould will not stop it coming back, so clean it off and keep watching. Check for faults too: a blocked trickle vent or a fan that does not work is a fault, and GOV.UK lists both among the ventilation problems behind damp.

Rung 3: Look for support and fix the cause

GOV.UK guidance signposts help for tenants: financial support such as the Warm Home Discount, Winter Fuel Payment and Cold Weather Payment, which can apply to some people on benefits, and energy grants for insulation or heating upgrades through schemes such as the Energy Company Obligation and Help to Heat. It adds that tenants must always get their landlord's approval before funded work. For debt, bills and energy advice it names Citizens Advice, MoneyHelper and National Energy Action, and Shelter for housing advice. Rules and eligibility change, so check them with the scheme or an adviser. If you rent and the home has building defects, report them to the landlord in writing.

Rung 4: Insulation, ventilation and then the air

Better insulation and draught-proofing cut heat loss, which keeps walls warmer. RICS warns that draught strips, replacement glazing and insulation can trap moisture and pollutants if the home lacks adequate ventilation, and gives the rule of thumb build tight, ventilate right. If the home is still humid after the cause has been dealt with, humidity control is an option. A loft-mounted Dryzen system covers 150 m2 per unit, extracts 12 litres a day and uses about 20 pounds a year in energy. It does not heat the home, it needs a loft, it is for owner-occupied homes, and it is not suitable for rental properties unless the landlord authorises the changes. It does not fix leaks, rising damp or penetrating damp.

Mistakes that make it worse

  • Sealing every vent and gap to keep the heat in, with no ventilation to let moisture out.
  • Drying washing on radiators in a shut room.
  • Painting over mould without finding the cause.
  • Pushing furniture hard against cold outside walls.
  • Assuming you must handle a building defect yourself if you rent.

In Chatham and the Medway Towns

Nothing about the link between a cold home and damp is specific to Chatham, and we have not verified a local statistic, so we will not invent one. Judge your own home by where the damp sits and when. See our local pages for Gillingham and Strood.

Questions we are asked

GOV.UK guidance lists poor insulation, inefficient or unaffordable heating and difficulty heating the home among the factors behind damp and mould. Cold surfaces are where everyday moisture condenses.

GOV.UK guidance says damp and mould are not the result of lifestyle choices. Normal household activity makes moisture, and the root causes are usually building defects, poor ventilation or inadequate heating.

GOV.UK guidance points to schemes such as the Energy Company Obligation and Help to Heat, and says tenants must always get their landlord's approval before funded work. Check current eligibility with the scheme or an adviser such as Citizens Advice.

They reduce heat loss, but RICS warns they can also trap moisture and pollutants if the home lacks adequate ventilation. Its rule of thumb is build tight, ventilate right.

Related guides

Local help

Sources: GOV.UK: Understanding and addressing the health risks of damp and mould in the home; RICS: Retrofitting and improving energy efficiency in your home

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