Draught proofing your home for warmth

Draughts are more than just an annoying chill; they are uncontrolled air leaks that allow cold air into your home and expensive warm air out, leading to significant heat loss and higher energy bills. For homeowners and renters, addressing these hidden gaps is one of the most cost-effective ways to improve home energy efficiency and comfort.

What is a draught and why does it matter?

A draught is simply unwanted airflow into or out of your home through gaps, cracks, and openings in the building's fabric. It is not just about feeling a cold breeze; these invisible leaks force your heating system to work harder, wasting energy and money.

Draught vs draft: understanding the terminology

In the UK, the term for this unwanted airflow is draught. This spelling is standard in British English. In American English, the same phenomenon is referred to as "draft". While both terms describe the same issue, draught is the correct and preferred spelling in a UK context.

The impact of draughts on home comfort and energy bills

Draughts directly undermine your home's warmth, creating cold spots and making rooms feel uncomfortable even when the heating is on. Beyond comfort, the financial impact can be substantial. Uncontrolled air leakage can account for up to 20% of heat loss in older British homes, with heat also escaping through windows, external doors, and floors. This means a considerable amount of the heat you pay for simply escapes.

By effectively draught-proofing, a typical household could save around £60 to £85 per year on energy bills. The Energy Saving Trust estimates that draught-proofing around windows, floors, and doors could save approximately £55 a year in Great Britain, with an additional £45 a year possible by draught-proofing an open chimney when not in use. Considering the average UK home uses around 9,500 kWh of gas per year for heating, reducing this wasted energy through draught-proofing is a key factor in cutting consumption and costs.

Identifying draughts in your home

Finding draughts is the first step to tackling them. While some are obvious, many are hidden and contribute silently to discomfort and energy waste.

Common draught hotspots

Draughts can appear in various places throughout your home. Common culprits include:

• Windows and doors: Gaps around frames, letterboxes, keyholes, and even pet flaps.
• Floorboards and skirting boards: Especially in older properties with suspended timber floors, gaps between boards and where skirting meets the floor or wall.
• Loft hatches: Often poorly sealed, allowing warm air to escape into the unheated loft space.
• Pipework and service penetrations: Gaps where pipes, cables, or extractor fan ducts pass through external walls or floors.
• Unused chimneys: Open flues in disused fireplaces act as direct channels for heat loss.

Simple methods for detecting air leaks

You do not need specialist equipment to find most draughts. Here are a few DIY methods:

• The hand test: On a cold, windy day, simply run your hand around window frames, door edges, skirting boards, and electrical outlets on external walls. You will often feel cold air seeping in.
• The incense stick test: Light an incense stick (or a lit candle, held carefully) and slowly move it around suspected draught areas. If the smoke (or flame) wavers or is drawn inwards, you have found a draught. Ensure windows and external doors are closed, and heating or extractor fans are off for accurate results.
• Visual inspection: Look for visible gaps or cracks around frames, skirting boards, and where different building materials meet. You might even see daylight through some larger gaps.

Effective draught-proofing solutions

Once you have identified the sources, choosing the right solution is crucial. Many fixes are simple and inexpensive.

Windows and doors

These are often the most noticeable sources of draughts.

• Self-adhesive foam or rubber strips: Ideal for sealing gaps around opening windows and doors. They come in various thicknesses to suit different gap sizes.
• Brush strips: Best for the bottom of doors, especially external ones, to prevent air coming in under the door.
• Gap fillers/sealants: Use flexible decorators' caulk for small, static gaps around window frames and skirting boards. For larger gaps, consider expanding foam or specialist fillers.
• Keyhole covers and letterbox brushes: Simple additions that make a big difference to small but significant openings.

Floorboards and skirting boards

Draughts from floors can make a room feel perpetually cold.

• Flexible sealant: For gaps between skirting boards and the wall or floor.
• Wood filler: For small gaps between individual floorboards.
• Draught excluder strips: Can be fitted underneath carpets or along the edges of rooms where floorboards meet walls.

Loft hatches and pipework

Do not overlook these less obvious areas.

• Loft hatch insulation and seals: Apply self-adhesive foam strips around the edge of the loft hatch to create an airtight seal. You can also add a layer of insulation to the top of the hatch itself.
• Expanding foam or sealant: Use around pipes and cables where they pass through external walls or floors to block air leaks.

Letterboxes and keyholes

Small openings can let in a surprising amount of cold air.

• Brush strips for letterboxes: These are easy to fit and significantly reduce airflow.
• Keyhole covers: Simple rotating covers can block the draught coming through keyholes.

Draught-proofing for renters and budget-conscious homes

Draught-proofing does not require major renovations or a large budget. Many effective solutions are temporary, non-damaging, and very affordable.

Non-permanent solutions

Renters can significantly improve comfort without altering the property permanently.

• Fabric draught excluders: Placed at the bottom of doors, these are easily removable and come in various styles.
• Removable window film: A clear plastic film applied to window frames can create a secondary glazing effect, reducing heat loss and draughts. It is easily removed without damage.
• Temporary gap fillers: Use removable putty or specialist temporary sealants for window gaps, which can be peeled off when you move.
• Heavy curtains or thermal blinds: These act as an extra barrier against draughts from windows, especially at night.

Cost-effective DIY fixes

Many draught-proofing materials are inexpensive and can be installed by homeowners or renters with basic DIY skills. Self-adhesive strips, gap fillers, and brush strips can cost as little as £3 to £8, making them an excellent investment with a quick payback. A loft hatch draught strip, for example, can cost around £5 to £10.

The benefits of a draught-free home

Beyond immediate comfort, effective draught-proofing offers a range of long-term advantages for your home and your wallet.

Improved energy efficiency

By preventing uncontrolled heat loss, your heating system will not have to work as hard to maintain a comfortable temperature. This directly translates to lower energy consumption and reduced energy bills. The Fuse app can help you monitor and manage your energy use, making the most of the efficiency gains from draught-proofing, and providing accurate data and control over your energy consumption.

Enhanced comfort and health

A draught-free home feels warmer and more consistent in temperature, eliminating cold spots and the need to constantly adjust the thermostat. This improved thermal comfort can also contribute to a healthier living environment by reducing damp and condensation issues that can arise from fluctuating temperatures and uncontrolled airflow.

Long-term savings and home value

The initial investment in draught-proofing materials is typically low, with quick returns through energy bill savings. Over time, these savings accumulate significantly. Furthermore, a more energy-efficient home is often more attractive to potential buyers, potentially adding to its long-term value. Effective draught-proofing is a tangible step towards taking control of your home's energy consumption and comfort, aligning with a future where energy is used optimally and efficiently.

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