---
title: "Fire Door Gap Gauge — £52K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/business-industry-science/fire-door-gap-gauge"
last_updated: "2026-07-31T13:46:42.562Z"
locale: en
meta:
description: "Niche score 52/100 · £52K/yr market · 35K searches/yr · £9.96 avg price. A small market ($52K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 52/100 · £52K/yr market · 35K searches/yr · £9.96 avg price. A small market ($52K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Fire Door Gap Gauge — £52K/yr Amazon UK Niche (2026) - Flapen"
---
# **fire door gap gauge**
**Worth a look**
Shows low returns (0.3%), but a small market ($52K/yr) keeps it on the watch list.
Market size 13Growth 15Conversion 97Competition 37Returns 99Price range 47Avg price 33Brand share 64Review moat 96Quality gap 72
**Returns**
**Incredible****0.3%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****14.9%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Incredible****83.35**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Good****66%**
top-5 brand share — brands hold most of the demand
**Price range**
**Okay****£3.76–£25.06**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Okay****63%**
top-5 click share — leaders hold, buyers still browse
**Avg price**
**Okay****£9.96**
avg listing price — sweet spot $15–$100
**Growth**
**Bad****-19.6%**
90-day search growth — must beat 0% to launch
**Market size**
**Bad****£52K**
£52K/yr · 35K searches
According to Flapen's Amazon United Kingdom niche tracking, fire door gap gauge is a £52K/yr Amazon United Kingdom market (35K searches/yr). The top 5 brands hold 66% of demand. Verdict: Worth a look — 52/100.
Data updated Jul 21, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **fire door gap gauge market data**
- **Units sold / yr**
- **6K–8K**
- avg 250–500/product
- **Revenue / yr**
- **£60K–£80K**
- units × avg price
- **Conversion rate**
- **14.9%**
- **Avg BSR**
- **#209**
- **Page quality**
- **0%**
- **Prime**
- **82%**
- **Sponsored**
- **59%**
- **Out of stock**
- **4.8%**
- **Avg brand age**
- **25 months**
- **Avg seller age**
- **211 days**
## **Competition & brand share**
The top 5 products take 63% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**15 **▲rising
**Sellers**
**20**
**Top-5 brand share**
**66%**
Top 20: 100%
**Top-5 click share**
**63%**
Top 20: 100%
**Open market**
**28%**
- Safelincs36% - Generic9% - AOROPS9% - Doormate - Quaytech UK7% - Blunesta6% - Kaelix5%
## **Demand**
Weekly Amazon search volume, last 17 weeks — -19.6% search growth over the last 90 days.
800600Spike '26Mar '26Apr '26Apr '26May '26May '26Jun '26Jun '26Jul '26Jul '26
[**Open Trend **](https://flapen.com/research/uk/business-industry-science/fire-door-gap-gauge/trend)
## **Top fire door gap gauge search terms**
- **fire door gap gauge**25K/yr-18.3%11.4% conv. - **door gap measuring tool**7K/yr-21.9%14.6% conv. - **fire door gap gauge checker tool**3K/yr-24.4%11.1% conv. [**All search terms **](https://flapen.com/research/uk/business-industry-science/fire-door-gap-gauge/search-terms)
## **Top fire door gap gauge products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%10%£5K20%£10K30%£16K40%£21K1101001K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)3 products missing review or click data not plotted
All 17 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Fire Door Gap Gauge Checker Tool Small and Light Pocket Fit**Safelincs**£3.76**4.5★891 rev](https://www.amazon.co.uk/dp/B07D8SRV1C) [2**Door Gap Measuring Tool 1-15mm Fire Door Gap Gauge Checker Tool Engineering Ruler Feeler Gauges for House Engineering Inspection Flatness Measuring Tool Ruler(0.5mm/0.2mm) (0.5mm)**AOROPS**£6.35**4.4★201 rev](https://www.amazon.co.uk/dp/B0BKFYG83B) [3**DoorMate Fire Door Gauge**Doormate - Quaytech UK**£25.06**4.0★1 rev](https://www.amazon.co.uk/dp/B0GLJ3RT9N) [4**Door Gap Measuring Tool 1-15mm Fire Door Gap Gauge Accurate Door Clearance Measurement Durable and Easy to Use**Blunesta**£4.72**3.3★5 rev](https://www.amazon.co.uk/dp/B0F8HBTXGV) [5**Door Gap Measuring Tool 115mm Fire Door Gap Gauge for Accurate Clearance Checks Durable Stainless Steel Measurement Tool**Kaelix**£4.40**4.5★5 rev](https://www.amazon.co.uk/dp/B0FDQBR684)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Fire Door Gap Gauge Calibrated Gap Measuring Tool for Fire Door Inspection & Compliance 210mm Precision Gauge for Inspectors Installers & Maintenance**Generic**£12.89**0 rev3mo ago](https://www.amazon.co.uk/dp/B0GWF736S2) [**DoorMate Fire Door Gauge**Doormate - Quaytech UK**£25.06**1 rev5mo ago](https://www.amazon.co.uk/dp/B0GLJ3RT9N) [**SPIDER FIRE DOOR GAP GAUGE (BLACK)**Generic**£24.93**6 rev5mo ago](https://www.amazon.co.uk/dp/B0FJC65H2B) [**Metal Door Gap Measuring Tool 2 Pcs Fire Door Gap Gauge Accurate 0.5mm for Gaps Flexible Feeler Gauge Welding Wedge Tool**Ulmervion**£8.10**0 rev7mo ago](https://www.amazon.co.uk/dp/B0G71BMNT4) [**2PCS Fire Door Gap Gauge Metal Door Gap Measuring Tool Door Gap Measuring Tool Accuracy 0.5mm Measuring Tool for Gate Gaps Feeler Survey Gate Gap Measure Welding Wedge Feeler Survey**Othrion**£8.04**2 rev8mo ago](https://www.amazon.co.uk/dp/B0FYXD4H9D)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Fire Door Gap Gauge Calibrated Gap Measuring Tool for Fire Door Inspection & Compliance 210mm Precision Gauge for Inspectors Installers & Maintenance**Generic**£12.89**0.0★**▲ 222%**](https://www.amazon.co.uk/dp/B0GWF736S2) [**Metal Door Gap Measuring Tool 2 Pcs Fire Door Gap Gauge Accurate 0.5mm for Gaps Flexible Feeler Gauge Welding Wedge Tool**Ulmervion**£8.10**0.0★**▲ 218%**](https://www.amazon.co.uk/dp/B0G71BMNT4) [**Spider Fire Door Gap Gauge Professional Aluminum Measuring Device with Anti-Scratch Coating for Fire Door gap Inspection**Generic**£24.79**0.0★**▲ 172%**](https://www.amazon.co.uk/dp/B0FXMM3ZW9) [**DoorMate Fire Door Gauge**Doormate - Quaytech UK**£25.06**4.0★**▲ 108%**](https://www.amazon.co.uk/dp/B0GLJ3RT9N) [**2PCS Fire Door Gap Gauge Metal Door Gap Measuring Tool Door Gap Measuring Tool Accuracy 0.5mm Measuring Tool for Gate Gaps Feeler Survey Gate Gap Measure Welding Wedge Feeler Survey**Othrion**£8.04**5.0★**▲ 106%**](https://www.amazon.co.uk/dp/B0FYXD4H9D)
**~~View all trending →~~**
## **What buyers say about fire door gap gauge**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Ease Of Use**37%
*“Easy to use and accurate”*
**Advertised Vs Actual Product**17%
*“As described”*
**Value For Money**17%
*“Cheap enough to hand out to staff and contractors”*
**Size-Overall**7%
*“Yes it fits in the pocket”*
**Measurement/Reading Accuracy**7%
*“Useful for measuring”*
**Strength**7%
*“Strong and sturdy, like the wife”*
**Instructions/User Manual/Troubleshooting**3%
*“Very easy to use and read”*
**Material Quality**3%
*“solid”*
**Quality-Overall**3%
*“Good quality”*
### **What buyers complain about **
**Strength**50%
*“Not too robust”*
**Value For Money**50%
*“total waste of money”*
### **Top return reasons **
**Material Quality**25%
**Defective Material/Parts**13%
**Functionality-Overall**13%
**Quality-Overall**13%
**Advertised Vs Actual Product**13%
**Measurement/Reading Accuracy**13%
**Strength**13%
## **Common questions**
- **Is fire door gap gauge profitable to sell on Amazon United Kingdom?**
- The niche generates £52K/yr across 17 tracked products. 1 of 6 products launched in the last 360 days are still selling. 90-day search growth is -19.6%. Flapen's verdict: Worth a look (52/100).
- **How competitive is the fire door gap gauge niche?**
- 15 brands and 20 sellers compete. The top 5 products take 63% of clicks and top 5 brands hold 66% of demand.
- **What do buyers complain about in fire door gap gauge?**
- Top complaints mined from reviews: Strength, Value For Money. The return rate is 0.3%.
- **What does it cost to enter the fire door gap gauge niche?**
- Listings span £3.76–£25.06; the average listing price is £9.96 (sweet spot $15–$100). The average incumbent carries 83 reviews — the moat a new listing must climb.
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