Useful information
Short explanations of common retrofit terms used in BER discussions and energy upgrade planning.
Internal wall insulation (dry lining)
Internal insulation is fitted on the inside face of external walls. It can significantly improve comfort in rooms that feel cold or damp, but it reduces room size slightly and can complicate fixing shelves or radiators.
External wall insulation
External insulation wraps the dwelling externally and can reduce thermal bridging. It changes the external appearance and may need planning permission depending on your circumstances.
Attic insulation
Ensuring consistent coverage over the ceiling area and around the attic hatch reduces heat loss. Pay attention to ventilation paths and avoid blocking eaves ventilation.
Zoning separates the house into areas (for example, upstairs/downstairs) so you can heat different spaces at different times.
TRVs (thermostatic radiator valves) can provide room-by-room control, reducing overheating and improving comfort.
Cold bridging occurs where heat “bypasses” insulation through more conductive paths (for example, at junctions, around openings, or through poorly insulated elements). Good detailing and continuous insulation coverage can materially reduce heat loss and condensation risk.
You can estimate the cost of running an electrical appliance using a simple formula:
Your actual unit rate depends on your supplier and tariff, so always use the rate from your bill.
Need a BER?
Contact us with the property address/townland, type and any deadline.