1980s and 1990s homes 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.

Homes built in the 1980s and 1990s are often thought of as modern, but many are now 30 to 45 years old. Their insulation was built to older standards, and their boilers and windows may be near the end of their life. 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. Partly filled cavities

Some homes from this period were built with a thin layer of insulation in the cavity. The survey will check what is there and whether more can be done.

2. Timber-frame homes

A number of estates from this era are timber-framed behind brick. Tell the surveyor if you know your home is timber-framed, as this affects which insulation is suitable.

3. Loft insulation top-ups

Lofts from this period often have less insulation than current guidance suggests. Clear the loft hatch area so the depth can be checked.

4. Older combi and system boilers

Boilers fitted in the 1990s or early 2000s may be inefficient by today's standards. Note the make, model and any fault history before the survey.

5. Early double glazing

Early double-glazed units can mist up or lose their seals. Point out any windows with condensation between the panes or draughts.

6. Estate and freehold rules

Some estates have covenants or management companies. Check your deeds if work could change the outside of the home.

7. Ventilation

Better insulation can raise humidity indoors. Keep trickle vents open and extractor fans working.

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.