---
title: "Reviews — window insulation - Flapen"
canonical_url: "https://flapen.com/research/uk/diy-tools/window-insulation/reviews"
last_updated: "2026-07-31T10:54:52.052Z"
locale: en
meta:
  description: "Niche score 42/100 · £33K/yr market · 263K searches/yr · £10.74 avg price. Doesn't clear our bar today. Data updated Jul 2026."
  "og:description": "Niche score 42/100 · £33K/yr market · 263K searches/yr · £10.74 avg price. Doesn't clear our bar today. Data updated Jul 2026."
  "og:title": "Reviews — window insulation - Flapen"
---

# **window insulation**

**Skip it**

A small market ($33K/yr) — this niche doesn't clear our bar today.

Market size 8Growth 24Conversion 14Competition 50Returns 83Price range 32Avg price 40Brand share 57Review moat 23Quality gap 97

**Quality gap**

**Incredible****3.8★**

avg incumbent rating — lower means beatable quality

**Returns**

**Great****1.6%**

return rate — above 5% kills the launch gate

**Brand share**

**Good****71%**

top-5 brand share — brands hold most of the demand

**Competition**

**Okay****55%**

top-5 click share — leaders hold, buyers still browse

**Avg price**

**Okay****£10.74**

avg listing price — sweet spot $15–$100

**Price range**

**Okay****£4.65–£19.95**

cheapest to priciest tracked listing — scored on the share inside $15–$100

**Growth**

**Bad****-2.2%**

90-day search growth — must beat 0% to launch

**Review moat**

**Bad****8,583.5**

avg incumbent reviews — the moat a new listing must climb

**Conversion**

**Bad****1.2%**

search→purchase rate — share of searches ending in a sale

**Market size**

**Bad****£33K**

£33K/yr · 263K searches

**Signals**[** Quality Gap**](https://flapen.com/research/niches?market=uk&signal=quality_gap "Avg rating < 4.0")