A draught excluder stops cold air sneaking under or around a door so your heating stays in the room you are paying for.
Prices checked on Amazon UK, 26 September 2026.
A draught excluder stops cold air sneaking under or around a door so your heating stays in the room you are paying for. In UK homes that usually means the gap at the bottom of an external door, a letterbox, or a door onto a cold hallway — not a full insulation job.
This guide compares fabric cushions, double-sided under-door foam, screw-on brush strips and automatic drop-down seals available on Amazon UK. We list products with live Amazon UK buy-box prices in GBP when checked on 26 September 2026 with UK delivery. We have not lab-tested them; sizes, gap claims and prices come from the listings.
Measure the gap and door width before buying. A seal too thin leaves a draught; one too thick may stop the door closing. Do not block essential vents or airflow for fuel-burning appliances.
How we pick
We shortlist products sold on Amazon UK using capacity, features, customer ratings and price band. We do not lab-test every model unless a page says so. The Amazon page is the live price. How we recommend.
Compare at a glance
The products
Buying advice
What to look for in a draught excluder
Match the product to the door and the gap, not the loudest energy-saving claim on the listing. Check four things on Amazon before you buy: the length versus your door width, the maximum gap height the listing states, whether it is temporary (slide-on fabric) or fixed (screw-on brush or drop-down), and that there is a live buy-box price in GBP with UK delivery.
Energy Saving Trust estimates draught proofing around windows, floors and doors could save around 55 a year in Great Britain (80 in Northern Ireland). Those figures are for whole-home draught proofing, not a promise for one under-door cushion — still a useful benchmark when you are deciding whether a £10–£35 seal is worth trying.
Our picks
- Best overall: Stormguard Automatic Drop Down Draught Excluder (838mm). A screw-fixed seal that drops when the door closes — suited to wooden and fire doors that need a neater permanent fix. Live Amazon UK price £34.69.
- Best budget: CUQOO Oxford Double Draft Excluder (light grey, adjustable about 70–90 cm). Slide-under, no tools, lowest price on this page at £9.51 a renter-friendly stopgap for a cold under-door gap.
- Best for busy family doors: STORMGUARD 838mm bottom-of-door brush strip (black). Screw-on brush that seals gaps up to 15mm, includes fixings, and can be cut to width — durable for high-traffic external or porch doors at 9.59.
Comparison table
| Model | Type | Fit notes (listing) | Amazon UK price (as checked) | Best for | | --- | --- | --- | --- | --- | | Stormguard Automatic Drop Down 838mm | Automatic drop-down seal | Wooden & fire doors; trimmable 838mm; fixings included | 34.69 | Best overall permanent seal | | CUQOO Oxford Double Draft Excluder | Double-sided under-door | Adjustable ~70–90 cm; slide under; no adhesives | 9.51 | Best budget / renters | | STORMGUARD 838mm Brush Strip | Screw-on brush | Gaps up to 15mm; cut to size; fixings included | £9.59 | Busy family / external doors |
Prices are the Amazon UK buy-box figures we recorded on 26 September 2026 with delivery set to the UK. Always confirm the live price, length and gap rating on Amazon before buying.
How to choose a draught excluder for UK doors
1. Measure the gap Slip a coin or ruler under the closed door. Note height in millimetres and door width in centimetres. Buy a product rated for that gap, not a random “one size”. 2. External vs internal — External and high-traffic doors suit durable brush strips or automatic drop-down seals. Removable fabric sausages and soft under-door wraps suit internal doors and renters who cannot screw into the door. 3. Permanent vs temporary — Screw-on seals stay put when the door opens. Slide-on foam moves with you or hangs on a handle when not needed. 4. Noise and light Dense under-door foam can cut some light and rattle; it is not full soundproofing. 5. Safety and ventilation — Do not block air bricks, trickle vents, or airflow needed for boilers and open fires. Energy Saving Trust advises leaving airflow under internal doors where you need cross-ventilation for moisture control. 6. Chimneys are different An unused open chimney needs a chimney-specific draught excluder or cap, not an under-door seal. EST estimates chimney draught proofing could save around £45 a year in GB when the fireplace is not in use.
Other options on this page
With only three live buy-box listings on the day we checked, every product on this page is one of the picks above. If the CUQOO under-door wrap is out of stock, the Stormguard brush strip at a similar price is the next no-frills option that still screws on for high traffic. If you want the door to look clean when open, favour the drop-down seal over a fabric sausage that sits on the floor.
Honest trade-offs
A draught excluder only seals the gap it fills. It will not fix poorly fitting frames, single glazing, or missing loft insulation. Slide-under foam is quick but can shift on thick carpet; screw-on brush strips need a drill and the right door material; drop-down seals cost more and need careful fitting on the door bottom. We have not fitted these products for this page — lengths, gap claims and prices come from Amazon UK titles and bullets at the time of checking.
Frequently asked questions
Do draught excluders work?
Yes — a draught excluder works by physically blocking the gap under or around a door so cold air cannot push into a warm room. Energy Saving Trust describes draught proofing as sealing unwanted gaps that let too much air in. It is not the same as wall insulation: it stops air movement through gaps, which often makes a room feel warmer even before the thermostat reading changes.
Are draught excluders worth it?
For many UK homes with a visible gap under an external door, yes — they are a low-cost DIY fix. Energy Saving Trust estimates draught proofing around windows, floors and doors could save around £55 a year in Great Britain (£80 in Northern Ireland), with figures published on their draught-proofing advice page. Actual savings depend on your home and how well the seal fits the gap you measured.
How much does draught proofing save?
Energy Saving Trust says draught proofing around windows, floors and doors could save around £55 a year in Great Britain and about 80 in Northern Ireland. Draught proofing an unused open chimney could save around 45 a year in GB (60 in NI). Turning the thermostat down by 1C (for example 22°C to 21°C) can save around £120 a year in GB according to the same EST page — only do that if the home stays comfortable.
Do draught excluders stop noise?
A dense under-door seal can reduce some airborne noise and door slam impact by filling the gap, and many Amazon listings mention noise reduction. They are not soundproofing panels — expect a quieter draught and less rattle, not studio-level silence. If noise is the main problem, look at how thick and how well the product fills your measured gap.
How do draught excluders work?
They fill the gap where air moves — usually under a door — with foam, brush fibres, a weighted fabric sausage, or an automatic drop-down seal that lowers when the door closes. Measure the gap height and door width first, then choose a product rated for that gap so the door still closes properly.
What is the best draught excluder for doors?
There is no single best type: pick by door and gap. External or high-traffic doors often suit a screw-on brush strip or automatic drop-down seal. Internal doors (and renters) often suit a removable fabric sausage or double-sided under-door foam that slides on without tools. Always match length to your door width and check the maximum gap the listing states.
Does draught excluder tape work?
Self-adhesive foam or brush tape can work well around door and window frames when the gap is small and the surface is clean and dry. Energy Saving Trust and Centre for Sustainable Energy both recommend foam, brush or plastic strips for frames. If the tape is thinner than the gap it will not seal; if it is too thick the door may not close. Measure first.
