The best way to draught proof a UK front door is to combine a brush strip for the bottom gap with self-adhesive foam strips for the sides and top, which the Energy Saving Trust says can save around £30-£40 a year on energy bills (Energy Saving Trust, 2026). This simple DIY fix stops cold air entering and warm air escaping, making your home noticeably more comfortable.
The exact method depends on your door type. A wooden door with a visible gap at the bottom needs a rigid brush strip (screw-fixed or slide-on), while a uPVC door may use a rubber sweep. For side and top gaps up to 5mm, self-adhesive foam strips work well. For gaps over 5mm, a metal or plastic strip with a rubber seal is more durable. The key is measuring gaps accurately before buying, too thick and the door won’t close; too thin and it won’t seal.
Measure the gaps first for a precise fit
Before buying anything, measure the gap between the door and the frame at the top, both sides, and the bottom. Use a ruler or tape measure, if the gap is less than 5mm, self-adhesive foam strips from a DIY store costing around £5-£10 are sufficient. For bottom gaps, measure the width of the door and the height of the gap. A standard brush strip with a 10mm brush pile costs roughly £10-£15 from major retailers. The Energy Saving Trust advises that a poor fit wastes the effort, so measure twice (Energy Saving Trust, 2026).
Choose the right seal for your door type
Wooden front doors benefit from rigid brush strips screwed to the bottom edge, they are durable and withstand foot traffic. For uPVC or composite doors, a rubber or silicone sweep that attaches to the door face is common. Side and top gaps on any door type can be sealed with self-adhesive foam strips, but for frequently used doors, a metal or plastic carrier strip with a rubber bulb seal lasts longer. The Gas Safe Register notes that draught proofing never covers gas appliances or flues (Gas Safe Register, 2026).
Install carefully and check the door closes smoothly
Clean the door and frame surface with a degreaser before applying adhesive seals. For brush strips, mark the position, drill pilot holes for screws, and fix firmly. After installation, close the door and check it latches without excessive force, if it sticks, trim the brush pile or adjust the strip. A well-sealed door should have no visible light gaps. The TrustMark website recommends using a registered installer for complex jobs, but most householders can DIY this in under an hour (TrustMark, 2026).
A worked example
For a typical 1930s semi-detached house in Manchester with a draughty wooden front door, the total cost for a complete door draught proofing uk kit, including a screw-fixed brush strip for the bottom and self-adhesive foam strips for the sides and top, comes to roughly £25. After fitting, the Energy Saving Trust estimates annual savings of around £35 on heating bills, meaning the materials pay for themselves in less than one year. Over a 25-year period, assuming energy prices rise by 3% annually, the total savings reach approximately £1,275. This simple upgrade also reduces heat loss by up to 15% for that single door, making the hallway noticeably warmer. Glazing is standard-rated for VAT at 20%. The zero rate for energy-saving materials covers insulation, heat pumps and solar panels; HMRC names secondary and double glazing as excluded (VAT Notice 708/6). No grants are needed for such a low-cost measure, but if you are on certain benefits, your local authority may offer free draught proofing through the ECO4 scheme.
| Item | Figure |
|---|---|
| Upfront cost after grants | £25 |
| Yearly savings | £35 |
| Payback period | Less than 1 year |
| 25-year lifetime savings | £1,275 |
What homeowners often get wrong
The most common mistake in door draught proofing uk is buying a seal that is too thick for the gap, which stops the door from closing properly. Here are three frequent errors to avoid.
- Buying foam strips that are too thick Homeowners often choose a 10mm foam strip for a 3mm gap, which bulges and prevents the door latch from engaging. The right approach is to measure the gap precisely with a ruler and select a strip that matches that measurement, otherwise you will have to remove it and start again.
- Fitting a brush strip that is too short for the door width Many people buy a standard 838mm brush strip for a 900mm wide door, leaving a 62mm gap at one end. The correct method is to measure the exact door width and buy a strip that can be cut to size with a hacksaw or tin snips, or the cold air will pour in through that uncovered section.
- Ignoring the letterbox draught Homeowners seal the door edges but forget the letterbox, which can let in as much cold air as a 5mm gap under the door. The fix is a simple letterbox brush or flap costing around £8, which can save an extra £10 a year and prevent whistling noises in windy weather.
Quick reference
- Measure all door gaps with a ruler before buying any door draught proofing uk materials to ensure a proper fit.
- Self-adhesive foam strips cost £5-£10 and work best for gaps under 5mm around the door sides and top.
- A screw-fixed brush strip for the bottom gap costs £10-£15 and is suitable for gaps up to 15mm.
- The Energy Saving Trust says proper door draught proofing saves £30-£40 per year on energy bills.
- Failing to seal the letterbox can waste up to £10 of those potential savings each year.
Frequently Asked Questions
Self-adhesive foam strips cost around £5-£10 from DIY stores. The Energy Saving Trust confirms this is a low-cost fix that stops drafts effectively.
A full DIY draught proofing kit costs roughly £15-£25. Ofgem notes this is a one-off expense that pays back in under a year through energy savings.
No, most front door draught proofing is a simple DIY job. The Energy Saving Trust says anyone can fit foam strips and brush seals with basic tools.
