Tools & Wizards About Us

Report Summary

  • 33

    Performance

    Renders faster than
    53% of other websites

  • 96

    Accessibility

    Visual factors better than
    that of 88% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 93

    SEO

    Google-friendlier than
    83% of websites

doubleglazing.com

Double Glazing | Replacement Windows | Find a Local Supplier

Page Load Speed

4 sec in total

First Response

747 ms

Resources Loaded

3 sec

Page Rendered

222 ms

About Website

Welcome to doubleglazing.com homepage info - get ready to check Double Glazing best content right away, or after learning these important things about doubleglazing.com

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Key Findings

We analyzed Doubleglazing.com page load time and found that the first response time was 747 ms and then it took 3.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

doubleglazing.com performance score

33

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.8 s

27/100

10%

LCP (Largest Contentful Paint)

Value4.2 s

43/100

25%

SI (Speed Index)

Value7.0 s

32/100

10%

TBT (Total Blocking Time)

Value2,710 ms

3/100

30%

CLS (Cumulative Layout Shift)

Value0.01

100/100

15%

TTI (Time to Interactive)

Value15.1 s

7/100

10%

Network Requests Diagram

www.doubleglazing.com

747 ms

hb_app.js

1 ms

style.min.css

250 ms

style.css

252 ms

style.min.css

334 ms

Our browser made a total of 144 requests to load all elements on the main page. We found that 86% of them (124 requests) were addressed to the original Doubleglazing.com, 3% (5 requests) were made to Fonts.gstatic.com and 3% (5 requests) were made to Gstatic.com. The less responsive or slowest element that took the longest time to load (747 ms) belongs to the original domain Doubleglazing.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 799.1 kB (50%)

Content Size

1.6 MB

After Optimization

805.9 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Doubleglazing.com main page is 1.6 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 70% of websites need less resources to load. HTML takes 906.3 kB which makes up the majority of the site volume.

HTML Optimization

-88%

Potential reduce by 794.1 kB

  • Original 906.3 kB
  • After minification 904.8 kB
  • After compression 112.2 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 794.1 kB or 88% of the original size.

Image Optimization

-0%

Potential reduce by 145 B

  • Original 100.3 kB
  • After minification 100.1 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Double Glazing images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 3.3 kB

  • Original 542.3 kB
  • After minification 542.3 kB
  • After compression 539.0 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. This website has mostly compressed JavaScripts.

CSS Optimization

-3%

Potential reduce by 1.5 kB

  • Original 56.1 kB
  • After minification 54.7 kB
  • After compression 54.6 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Doubleglazing.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 119 (89%)

Requests Now

133

After Optimization

14

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 133 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Double Glazing. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 116 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

doubleglazing.com accessibility score

96

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

doubleglazing.com best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

doubleglazing.com SEO score

93

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Doubleglazing.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Doubleglazing.com main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

Open Graph data is detected on the main page of Double Glazing. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: