Reducing Energy Bills in Older British Houses

Why older British homes struggle to stay warm

Period properties have character, but they were built in an age when coal was cheap and energy efficiency was not a priority. Solid brick walls, sash windows, original floorboards and open chimneys all allow heat to escape. The good news is that you do not need to undertake a major renovation to feel the difference. By tackling draughts, topping up loft insulation and using thick curtains properly, you can cut heat loss, reduce bills and make your home feel warmer without altering its historic character.

Draught-proofing: the cheapest place to begin

Draughts are responsible for a surprising amount of heat loss, and they make a room feel cold even when the heating is on. Before spending money on insulation, stop the cold air moving through gaps. Most draught-proofing is inexpensive, reversible and suitable for listed or period properties because it does not change the fabric of the building.

• Windows and doors: Fit brush seals or foam strips around opening windows and external doors. For sash windows, use a combination of brush seals and silicone sealant where the frame meets the wall. Avoid sealing up trickle vents or any deliberate ventilation gaps.
• Chimneys: An open chimney is a direct route for warm air to leave the room. A chimney balloon or a sheep’s wool draught excluder can be removed when you light a fire. Never block a chimney if you have an open fire or gas appliance that needs ventilation.
• Floorboards and skirting: Gaps between floorboards and along skirting boards can be sealed with flexible silicone sealant or wood filler. Do not seal under floors that need to breathe, especially in older timber-framed homes.
• Letterboxes and keyholes: Fit a letterbox flap with a brush seal and a keyhole cover. These small items cost very little and make a noticeable difference in hallways.

Always keep ventilation in mind. Kitchens, bathrooms and rooms with open fires or gas boilers need a supply of fresh air. Draught-proofing should stop unwanted draughts, not block essential airflow.

Loft insulation: the simplest big win

Heat rises, and in many older houses the loft is under-insulated. If you can see the joists, you almost certainly need more insulation. The current recommendation for a cold loft is around 270mm of mineral wool. If you already have 100mm, topping it up is a straightforward job that pays back quickly.

• Insulate between and over the joists: Lay the first layer between the joists, then cross-lay a second layer at right angles. This reduces cold bridging through the timber.
• Do not block ventilation: Older roofs often rely on airflow at the eaves to prevent damp. Keep insulation clear of eaves vents and do not pack it into tight corners where air needs to move.
• Insulate the loft hatch: A draughty loft hatch can undo much of your work. Fit a insulated cover or draught-proof the frame with foam strips.
• Lag pipes and tanks: Insulate hot water pipes and the cold water tank in the loft. In very cold weather, this also helps prevent frozen pipes.

If your loft is damp, has old wiring or is difficult to access, it is worth asking a qualified installer to advise. For many simple cold lofts, however, it is a satisfying DIY task.

Thick curtains and window coverings

Windows are a major source of heat loss in period homes. Heavy, floor-length curtains with thermal linings act as an extra layer of insulation. They are especially effective in Victorian and Edwardian houses with large sash windows.

• Choose the right length: Curtains should reach the floor or sit just above a radiator. If a radiator is under the window, avoid hanging curtains over it, as this sends heat straight out of the glass. A radiator shelf can help deflect warmth into the room.
• Close them before dusk: Draw curtains at dusk and open them in the morning to let in daylight and reduce condensation. This simple habit traps warmth when the temperature drops.
• Use a pelmet or ceiling track: A pelmet or a track fitted close to the ceiling reduces draughts behind the curtain heading and stops warm air escaping upwards.
• Add secondary glazing film: Clear plastic secondary glazing film is cheap, removable and can cut draughts through sash windows without affecting the appearance of the property.

Blinds can help too, especially honeycomb or thermal blinds, but they are less effective than thick curtains that overlap in the middle and sit close to the wall.

Everyday habits and low-cost extras

Once the basics are in place, small habits and inexpensive additions can keep your home warmer for longer.

• Bleed radiators: Trapped air stops radiators heating properly. Bleed them once a year, usually in autumn, and check that all radiators heat evenly.
• Use radiator reflector panels: These thin reflective sheets sit behind radiators on external walls and bounce heat back into the room. They are cheap and easy to fit.
• Set a sensible thermostat: Aim for around 18–21°C when you are at home and lower it when you are out or asleep. A programmable thermostat or thermostatic radiator valves give you more control without wasting heat.
• Lay rugs on bare floors: Original floorboards look beautiful, but rugs add warmth underfoot and reduce draughts rising through gaps.
• Use door snakes and draught excluders: These are particularly useful for front doors, back doors and any room you want to keep warm without heating the whole house.

Start with the cheapest and simplest measures: draught-proofing, then loft insulation, then curtains and window coverings. In an older British house, these small steps often deliver the most noticeable comfort for the least disruption. You can always add more later, but you may find you do not need to.