Best Draught Excluders UK (2026): Top 5 We'd Buy
Door, window, letterbox & chimney picks to stop draughts and cut your heating bills
TopMagpie Editorial
Independent product research · Not sponsored · Updated 21 September 2026
Editorial research, not lab testing
With UK energy bills still elevated and autumn chills arriving, blocking draughts is one of the quickest wins for a warmer home. According to the Energy Saving Trust, draught-proofing your home could save around £55 per year on heating bills.
We've rounded up five top-rated draught excluders available on Amazon UK, plus specialist picks for letterboxes and chimneys. From simple under-door cushions to professional-grade brush strips, there's an option for every gap type and budget.
Editor's Choice
CUQOO Under Door Draught Excluder
The easiest win for cold rooms. Zero faff, works immediately, and the machine-washable cover is a nice touch.
Quick Picks
The best draught excluder for every situation
Diagnose Your Problem
Where's Your Draught Coming From?
Different gaps need different solutions. Find your problem below and we'll point you to the right fix.
Under the door
Cold air creeping in beneath internal or exterior doors
The Fix
Under-door cushion for renters, adhesive strip for homeowners, brush strip for exterior doors
Door & window frames
Gaps around the edges where frames meet walls
The Fix
D-profile foam tape for budget sealing, acoustic seal for noise issues too
Letterbox
That rectangular hole in your front door – often overlooked
The Fix
Internal letterbox cover with brush seal and spring flap
Unused chimney
Cold air pouring down the flue into your living room
The Fix
Chimney balloon – measure your flue first, remove before lighting fires
Loft hatch & floorboards
Air escaping through ceiling and floor gaps
The Fix
Use foam strip around loft hatch. Floorboards may need professional filler.
Our Top 5 Picks
Compare all
CUQOO
CUQOO Under Door Draught Excluder
“The easiest win for cold rooms. Zero faff, works immediately, and the machine-washable cover is a nice touch.”
Best for
Renters or anyone wanting a quick, tool-free solution for internal doors
Pros
- +No installation – just slide under the door
- +Works on both sides of the door
- +Machine-washable cover
- +Adjustable width via hook-and-loop
Cons
- −May shift on high-pile carpet
- −Not suitable for exterior doors with large gaps
All specifications
| Type | Under-door cushion |
| Gap coverage | Up to 3.8cm |
| Door width | 76–91cm (adjustable) |
| Material | Foam with fabric cover |
| Installation | None – slides under door |
Hojoy
Hojoy Self-Adhesive Silicone Door Seal (2-Pack)
“Amazon's bestseller for good reason. Two strips for the price of one, and the 3M adhesive actually holds.”
Best for
Semi-permanent sealing of internal or sheltered external doors
Pros
- +2 strips in one pack – great value
- +Strong adhesive for long-lasting seal
- +Silicone resists temperature extremes
- +Can cut to exact length needed
Cons
- −Requires clean, smooth surface for adhesive
- −Not reusable once stuck
- −May need hairdryer to activate adhesive in cold weather
All specifications
| Type | Self-adhesive silicone strip |
| Gap coverage | Up to 2.5cm |
| Length | 2 × 100cm strips |
| Material | Silicone with 3M adhesive |
| Installation | Peel-and-stick (warm surface recommended) |
Stormguard
Stormguard Acoustic Silent Seal (6m)
“The trade-grade option. If you want quieter rooms AND warmer ones, this is the upgrade worth making.”
Best for
Door and window frames where noise and draughts are both problems
Pros
- +Excellent noise reduction as well as draught-proofing
- +6 metres covers multiple doors/windows
- +Self-adhesive for easy fitting
- +Quality UK brand trusted by tradespeople
Cons
- −For frame gaps, not under-door gaps
- −Requires measuring and cutting
- −May be overkill for minor draughts
All specifications
| Type | Frame seal (EPDM rubber) |
| Gap coverage | 3–5mm |
| Length | 6m |
| Material | EPDM rubber |
| Installation | Self-adhesive to frame |
Stormguard
Stormguard Aluminium Brush Bottom Door Seal
“The proper fix for front doors. Yes, you need a drill – but this actually handles UK weather and big gaps.”
Best for
Front doors, exterior doors, garage doors, or anywhere needing heavy-duty sealing
Pros
- +Professional, durable solution
- +Handles large gaps up to 25mm
- +Adjustable via slotted screw holes
- +Suits exterior, garage, and sliding doors
Cons
- −Requires drilling and screwing
- −May need trimming to fit door width
- −More involved installation
All specifications
| Type | Screw-fix brush strip |
| Gap coverage | Up to 25mm |
| Length | 914mm (can be cut) |
| Material | Aluminium carrier, polypropylene brush |
| Installation | Screw-fixed to door bottom |
Generic
D-Profile Foam Weather Strip (10m)
“Best bang for buck. Ten metres is enough to seal every door and window in a small flat for under a tenner.”
Best for
Budget-conscious buyers sealing multiple doors and windows
Pros
- +10 metres for multiple doors/windows
- +Very affordable
- +Easy peel-and-stick installation
- +D-profile compresses well for good seal
Cons
- −Adhesive may weaken over time
- −Not for large gaps
- −May need replacing every 1–2 years
All specifications
| Type | D-profile foam tape |
| Gap coverage | 4–6mm |
| Length | 10m (2 × 5m strips) |
| Material | EPDM foam rubber |
| Installation | Self-adhesive |
Letterbox & Chimney Solutions
Two of the biggest (and most overlooked) draught sources in UK homes.
Exitex
Exitex Internal Letterbox Draught Excluder with Flap
“Letterboxes are stealth draught sources. This solid aluminium fix pays for itself fast if yours lets in Arctic air.”
Best for
Draughty front door letterboxes
Pros
- +Durable aluminium construction
- +Spring flap closes firmly after post delivery
- +Bristles block draughts, dust, and insects
- +Fits most standard UK letterboxes
Cons
- −Requires screw fixing (drilling)
- −Only for internal fitting
- −Check letterbox size before buying
All specifications
| Type | Internal letterbox cover |
| Aperture size | 255mm × 40mm |
| Material | Aluminium with polypropylene bristles |
| Installation | Screw-fixed inside door |
| Colours | Black, Gold, White |
The Chimney Balloon
Chimney Balloon Draught Excluder (Medium)
“Unused fireplaces are heat vampires. This UK-made blocker transforms cold living rooms – just measure your flue first.”
Best for
Unused fireplaces that let cold air pour into the room
Pros
- +Dramatically reduces chimney draughts
- +Made in UK – not cheap PVC
- +Reusable for years
- +Easy to install and remove
Cons
- −Must measure chimney correctly for right size
- −Must remove before lighting fire
- −Not for chimneys with active fires
All specifications
| Type | Inflatable chimney blocker |
| Size | 14" × 24" (35cm × 60cm) |
| Material | Trilaminate plastic (PVC-free) |
| Installation | Inflate and push into flue |
| Includes | Mouth inflation tube |
Compare All Products
Side-by-side specs for quick decision-making
| Product | Type | Gap | Price | Best For | Action |
|---|---|---|---|---|---|
 CUQOO Under Door Draught ExcluderBest Overall | Under-door cushion | Up to 3.8cm | £7–£10 | Renters or anyone wanting a quick, tool-free solution for internal doors | View |
 Hojoy Self-Adhesive Silicone Door Seal (2-Pack)Amazon Bestseller | Self-adhesive silicone strip | Up to 2.5cm | £7–£10 | Semi-permanent sealing of internal or sheltered external doors | View |
 Stormguard Acoustic Silent Seal (6m)Best for Noise | Frame seal (EPDM rubber) | 3–5mm | £8–£12 | Door and window frames where noise and draughts are both problems | View |
 Stormguard Aluminium Brush Bottom Door SealBest for Front Door | Screw-fix brush strip | Up to 25mm | £6–£10 | Front doors, exterior doors, garage doors, or anywhere needing heavy-duty sealing | View |
 D-Profile Foam Weather Strip (10m)Best Budget | D-profile foam tape | 4–6mm | £5–£8 | Budget-conscious buyers sealing multiple doors and windows | View |
 Exitex Internal Letterbox Draught Excluder with FlapBest for Letterbox | Internal letterbox cover | £14–£18 | Draughty front door letterboxes | View | |
 Chimney Balloon Draught Excluder (Medium)Best for Chimney | Inflatable chimney blocker | £15–£20 | Unused fireplaces that let cold air pour into the room | View |
Ventilation Safety – Don't Block These
Never block intentional ventilation. Air vents, airbricks, trickle vents, and extractor fans provide essential ventilation for gas appliances and prevent damp/mould. Only seal unintentional gaps (under doors, window frames, letterboxes). If you have gas appliances, ensure adequate ventilation remains at all times.
Research Methodology
How We Chose These Products
This is editorial research, not laboratory testing. We do not physically test products in controlled conditions or measure thermal performance with instruments.
Our selection process involves reviewing Amazon UK product listings, analysing customer reviews (prioritising verified UK purchases), comparing manufacturer specifications, and evaluating real-world feedback patterns. We weight criteria to prioritise practical value for typical UK homes.
Selection Criteria
Customer Satisfaction
30% weightVerified UK buyer reviews, focusing on real-world performance feedback and common issues reported
Value for Money
25% weightPrice relative to coverage area, durability indicators, and feature set compared to alternatives
Ease of Installation
20% weightSuitability for DIY fitting, tools required, and whether renters can use without causing damage
Gap Coverage
15% weightMaximum gap size sealed and suitability for different door/window types common in UK homes
Availability & Reliability
10% weightConsistent stock on Amazon UK, seller reputation, and return policy clarity
Important Limitations
- •We have not measured thermal efficiency or air leakage reduction in laboratory conditions
- •Star ratings and review counts are snapshots that may change over time
- •Prices shown are approximate and fluctuate; always verify current Amazon prices
- •Performance depends on correct installation and your specific gap dimensions
Research last conducted: 21 September 2026
Frequently Asked Questions
Everything you need to know about draught-proofing your home
For front doors with large gaps (over 10mm), a screw-fix brush strip like the Stormguard Aluminium Brush is best – it handles gaps up to 25mm and withstands weather. For smaller gaps, a self-adhesive silicone strip works well. Don't forget to add a letterbox excluder if your letterbox lets in cold air.
Yes, when fitted correctly to the right gap type. The Energy Saving Trust estimates draught-proofing can save around £55 per year on heating bills for a typical UK home. You'll also notice rooms feel warmer and less "breezy" immediately after fitting.
According to the Energy Saving Trust, draught-proofing windows and doors can save you around £55 per year. The actual savings depend on how draughty your home is, your heating habits, and energy prices. Most draught excluders cost £5–£20, so they typically pay for themselves within the first winter.
Brush strips are best for large, uneven gaps (up to 25mm) and exterior doors – they're durable and allow doors to open/close smoothly. Foam strips suit smaller frame gaps (3–6mm) and are very affordable. Snake/cushion excluders are ideal for renters as they need no installation – just slide under the door.
Absolutely. Under-door snake excluders (like the CUQOO) require no installation at all – just slide them into place. Self-adhesive strips can usually be removed without damage when you move out. Always photograph before/after and check your tenancy agreement if unsure.
In British English, "draught" is the correct spelling for a current of air. "Draft" is the American English spelling. Both refer to the same thing. UK product packaging typically uses "draught", though you'll see "draft" on some Amazon listings from international sellers.
Fit an internal letterbox cover with a brush seal and flap, like the Exitex model. These mount inside your door with screws, have bristles that block draughts while still allowing post through, and a spring-loaded flap that closes after each delivery.
For unused fireplaces, a Chimney Balloon is the most effective solution. It's an inflatable blocker you push into the flue – dramatically reducing draughts, noise, and debris. Measure your chimney first and get the right size. Remember: always remove it before lighting a fire.
The biggest culprits are: gaps under and around doors (especially front doors), window frames, letterboxes, unused chimneys, loft hatches, and gaps around pipes/cables where they enter walls. Start with your front door and any rooms that feel noticeably cold.
No – and this is important for safety. Never block air vents, airbricks, trickle vents, or extractor fans. These provide essential ventilation for gas appliances and preventing damp/mould. Focus on unintentional gaps (under doors, window frames, letterboxes) rather than intentional ventilation.
Ready to stop those draughts?
Our top pick – the CUQOO Under Door Excluder – is affordable, effective, and needs zero installation. Just slide it under your door.
View #1 Pick on Amazon UKDisclosure & Editorial Policy
Amazon Affiliate: TopMagpie is a participant in the Amazon Services LLC Associates Programme. We earn from qualifying purchases. This doesn't affect our editorial choices or the prices you pay.
No Lab Testing: We have not laboratory-tested these products. Recommendations are based on spec analysis, reviews, and editorial judgement.
Prices: Approximate, checked September 2026. Amazon prices change frequently – always verify the current price before purchasing.
Data Source: The £55 figure is from the Energy Saving Trust. Actual results vary based on your specific situation.
