Putting up shelves, TVs and satellite dishes after ECO4 wall insulation: a UK household checklist (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.

Solid wall insulation under ECO4 changes what sits behind the surface of your walls. Internal wall insulation adds boards, insulation and a new plaster finish inside the room. External wall insulation adds insulation and a render or brick-effect finish outside. Both can make it harder to fix things to the wall the way you did before. This checklist is general information from ApplyFreeBoiler.uk, a heating and insulation installer in Bury, and does not replace guidance from the installer or the insulation system maker.

1. Ask for the system details

Ask the installer which insulation system was used and keep the paperwork. System makers usually publish guidance on suitable fixings, and any guarantee may set out what you can and cannot do to the finish.

2. Use fixings made for insulated walls

Ordinary plugs may not hold in insulation boards. Heavy items such as wall-hung TVs, kitchen cupboards or radiators usually need longer fixings that reach the original wall, or special fixings made for insulated walls. Ask the installer or a competent tradesperson before fixing anything heavy.

3. Plan heavy items before the work if you can

If you know you will want a TV bracket, shelves or cupboards on an insulated wall, tell the installer before work starts. Timber or other fixing points can sometimes be built in during the install.

4. Seal holes in external render

Drilling through an external insulation finish, for example for a satellite dish, hanging basket or outside light, can let water into the insulation if the hole is not sealed. Use the fixings and sealant the system maker recommends, or ask the installer to do it.

5. Take care with cables and pipes

Wiring and pipework may have been moved or extended during internal wall insulation. Use a cable and pipe detector before drilling and ask the installer where services were rerouted.

6. Keep vents and air bricks clear

New fixings, shelves or furniture should not cover trickle vents, air bricks or extractor outlets. Ventilation matters more once a home is better insulated, to help avoid condensation and damp.

7. Report cracks or damage early

If you notice cracks, gaps or damp patches around a fixing or on the insulated finish, contact the installer and check your guarantee before attempting repairs.

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.