Tools & Wizards About Us
duro-last.com screenshot

Report Summary

  • 55

    Performance

    Renders faster than
    72% of other websites

  • 82

    Accessibility

    Visual factors better than
    that of 52% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 79

    SEO

    Google-friendlier than
    40% of websites

duro-last.com

Commercial Roofing System - Single Ply PVC Roofing Company | Duro-Last, Inc.

Page Load Speed

930 ms in total

First Response

15 ms

Resources Loaded

657 ms

Page Rendered

258 ms

duro-last.com screenshot

About Website

Welcome to duro-last.com homepage info - get ready to check Duro Last best content for United States right away, or after learning these important things about duro-last.com

Duro-Last Roofing manufactures the world's best commercial roofs & commercial roofing systems! Contact us today to learn about single-ply roofing systems!

Visit duro-last.com

Key Findings

We analyzed Duro-last.com page load time and found that the first response time was 15 ms and then it took 915 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.

Performance Metrics

duro-last.com performance score

55

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.1 s

80/100

10%

LCP (Largest Contentful Paint)

Value3.7 s

57/100

25%

SI (Speed Index)

Value3.3 s

91/100

10%

TBT (Total Blocking Time)

Value420 ms

66/100

30%

CLS (Cumulative Layout Shift)

Value0.585

11/100

15%

TTI (Time to Interactive)

Value11.1 s

20/100

10%

Network Requests Diagram

duro-last.com

15 ms

duro-last.com

78 ms

css2

60 ms

bootstrap.min.css

61 ms

all.min.css

111 ms

Our browser made a total of 34 requests to load all elements on the main page. We found that 47% of them (16 requests) were addressed to the original Duro-last.com, 9% (3 requests) were made to Cdnjs.cloudflare.com and 9% (3 requests) were made to Cdn.sitesearch360.com. The less responsive or slowest element that took the longest time to load (205 ms) relates to the external source Google-analytics.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 146.1 kB (9%)

Content Size

1.7 MB

After Optimization

1.5 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Duro-last.com main page is 1.7 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. 40% of websites need less resources to load. Images take 1.5 MB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 49.3 kB

  • Original 63.9 kB
  • After minification 62.7 kB
  • After compression 14.6 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 49.3 kB or 77% of the original size.

Image Optimization

-7%

Potential reduce by 96.6 kB

  • Original 1.5 MB
  • After minification 1.4 MB

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. Duro Last images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 146 B

  • Original 113.2 kB
  • After minification 113.2 kB
  • After compression 113.0 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

-2%

Potential reduce by 15 B

  • Original 838 B
  • After minification 838 B
  • After compression 823 B

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. Duro-last.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 15 (52%)

Requests Now

29

After Optimization

14

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 29 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Duro Last. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

duro-last.com

duro-last.com

15 ms

duro-last.com

duro-last.com

78 ms

css2

css2

60 ms

bootstrap.min.css

bootstrap.min.css

61 ms

all.min.css

all.min.css

111 ms

custom.min.css

custom.min.css

22 ms

api.js

api.js

67 ms

google_tag_manager.js

google_tag_manager.js

39 ms

bootstrap.bundle.min.js

bootstrap.bundle.min.js

79 ms

jquery-3.7.1.min.js

jquery-3.7.1.min.js

46 ms

custom.min.js

custom.min.js

38 ms

site_search_360.js

site_search_360.js

38 ms

sitesearch360-v13.min.js

sitesearch360-v13.min.js

71 ms

swap.js

swap.js

54 ms

gtm.js

gtm.js

128 ms

logo.png

logo.png

48 ms

Website-Banner-Images_20249_uid_66216aebab6d1.png

Website-Banner-Images_20249_uid_66216aebab6d1.png

105 ms

building_owner_uid_62d17293e568c.png

building_owner_uid_62d17293e568c.png

34 ms

architect_uid_62d17293d4274.png

architect_uid_62d17293d4274.png

33 ms

contractor_uid_62d17293c2097.png

contractor_uid_62d17293c2097.png

43 ms

facebook.png

facebook.png

33 ms

twitter.png

twitter.png

42 ms

youtube.png

youtube.png

43 ms

flickr.png

flickr.png

43 ms

linkedin.png

linkedin.png

43 ms

ss360-unibox-v13.chunk.27665f6cc18723c8c279.js

ss360-unibox-v13.chunk.27665f6cc18723c8c279.js

31 ms

ss360-styles-v13.chunk.6ae25745a22b6f76ba5b.js

ss360-styles-v13.chunk.6ae25745a22b6f76ba5b.js

67 ms

KFOmCnqEu92Fr1Me5g.woff

KFOmCnqEu92Fr1Me5g.woff

69 ms

fa-solid-900.ttf

fa-solid-900.ttf

52 ms

fa-regular-400.ttf

fa-regular-400.ttf

63 ms

js

js

55 ms

analytics.js

analytics.js

25 ms

collect

collect

205 ms

collect

collect

33 ms

Accessibility Review

duro-last.com accessibility score

82

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

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

duro-last.com best practices score

92

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

Page has valid source maps

SEO Factors

duro-last.com SEO score

79

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

High

robots.txt is not valid

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

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 Duro-last.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 Duro-last.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

duro-last.com

Open Graph description is not detected on the main page of Duro Last. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: