North-facing rooms and ECO4: questions UK households ask (guide 2026)

Guide by ApplyFreeBoiler.uk (Reliant Energy Solutions Ltd), a heating and insulation installer in Bury, Greater Manchester. We are not the government, Ofgem or an energy supplier.

Rooms that face north get little direct sun in the UK, so they are often the coldest rooms in a home and the most likely to show damp or mould on outside walls. This raises a few common questions when a home is assessed for ECO4 heating or insulation. This guide covers questions households commonly ask. It is general information from ApplyFreeBoiler.uk, a heating and insulation installer in Bury. What is recommended depends on the survey and the scheme rules at the time. This page does not guarantee funding.

1. Say which rooms face north

Tell the surveyor which rooms face north and whether they feel colder than the rest of the house.

2. Cold outside walls

Mention walls that feel cold to the touch, and whether furniture against them gets damp.

3. Damp and mould

Point out black mould in corners, behind wardrobes or around windows in those rooms.

4. Radiators

Say whether each north-facing room has a radiator and whether it heats the room well.

5. Ventilation

Note whether those rooms have trickle vents, airbricks or an extractor fan, and whether they are kept open.

6. Your current heating

Say what heating you use now, the age of your boiler and how you use the heating controls.

7. Clear access

Clear space around the boiler, meters and loft hatch before the survey visit.

8. Check funding and local figures

See ECO measures by council on ApplyFreeBoiler.uk, built from DESNZ Household Energy Efficiency statistics, to see how many ECO measures have been installed in your local authority area. Use the ApplyFreeBoiler.uk eligibility check to see whether an ECO4 heating or insulation pathway may be available for your home in England, Scotland or Wales. ECO4 is due to close on 31 December 2026.