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Double Glazing and Window Company Analytics: How UK Window Businesses Use Data to Convert More Sales

10 May 2026·Updated Jun 2026·10 min read·GuideIntermediate
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In this article
  1. The Window and Door Business Model
  2. Core Metrics for Window and Door Companies
  3. Installation Scheduling and Efficiency
  4. After-Sales Service and Referrals
  5. Showroom Performance
Key Takeaways

Double glazing and window companies that track survey conversion, sales team performance and installation margins consistently outperform those relying on high-pressure tactics alone. Here is the data guide for UK window businesses.

  • The Window and Door Business Model
  • Core Metrics for Window and Door Companies
  • Installation Scheduling and Efficiency
  • After-Sales Service and Referrals
  • Showroom Performance

The Window and Door Business Model#

Core Metrics for Window and Door Companies#

Survey-to-Sale Conversion Rate#

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Average Contract Value#

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Lead Cost by Source#

Installation Gross Margin#

Cancellation Rate#

Installation Scheduling and Efficiency#

After-Sales Service and Referrals#

Showroom Performance#

People also ask

How much does double glazing cost in the UK?

UK double glazing installation costs range from approximately £300-£700 per standard casement window to £1,000-£2,000 for larger bay windows. A typical 3-bedroom semi-detached with 8-10 windows might cost £4,000-£8,000 for a standard PVC-U installation. Triple glazing, premium frames and complex configurations command higher prices.

What margin do double glazing companies make?

Well-run UK window companies achieve gross margins of 40-60% on installation contracts. The wide range reflects product mix (PVC-U versus aluminium versus timber), sale size, and whether customers are buying direct or through showrooms or leads. Net margins after sales, marketing and overhead costs typically run 8-15% for efficient operations.

How do window companies get leads?

Google Ads targeting 'double glazing near me' and product-specific searches drive high-intent leads. Meta Ads targeted to homeowners in specific postcodes work for volume campaigns. Canvassing and leaflet drops are traditional channels still used by many companies. Comparison websites and Which? Trusted Traders generate pre-screened leads. Customer referral programmes are the highest-converting and lowest-cost channel.

What regulations apply to double glazing installation in the UK?

Window and door installations must comply with Building Regulations requirements for energy performance (U-values) and safety glazing. Part L compliance documentation is required. FENSA or CERTASS registration allows window companies to self-certify compliance with Building Regulations without a separate Building Control application — a significant commercial benefit and requirement for most sales.

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