Tools & Wizards About Us
isover.nl screenshot

Report Summary

  • 38

    Performance

    Renders faster than
    57% of other websites

  • 89

    Accessibility

    Visual factors better than
    that of 71% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

isover.nl

Isover Nederland | De duurzame keuze voor isolatiematerialen in Nederland

Page Load Speed

4.4 sec in total

First Response

638 ms

Resources Loaded

3.2 sec

Page Rendered

491 ms

isover.nl screenshot

About Website

Visit isover.nl now to see the best up-to-date Isover content for Netherlands and also check out these interesting facts you probably never knew about isover.nl

Isoleren met ISOVER glaswol is duurzaam, eenvoudig en brandveilig. Haal de beste isolatieprestaties met ISOVER. Hoe u het beste isoleeert? U vindt het op ISOVER.nl. Isolatiematerialen

Visit isover.nl

Key Findings

We analyzed Isover.nl page load time and found that the first response time was 638 ms and then it took 3.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

isover.nl performance score

38

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.1 s

46/100

10%

LCP (Largest Contentful Paint)

Value3.7 s

58/100

25%

SI (Speed Index)

Value9.1 s

14/100

10%

TBT (Total Blocking Time)

Value890 ms

32/100

30%

CLS (Cumulative Layout Shift)

Value0.286

42/100

15%

TTI (Time to Interactive)

Value11.6 s

18/100

10%

Network Requests Diagram

www.isover.nl

638 ms

google_tag.script.js

45 ms

google_tag.script.js

25 ms

google_tag.script.js

388 ms

input-reset.css

387 ms

Our browser made a total of 208 requests to load all elements on the main page. We found that 96% of them (200 requests) were addressed to the original Isover.nl, 2% (5 requests) were made to Googletagmanager.com and 1% (3 requests) were made to Static.addtoany.com. The less responsive or slowest element that took the longest time to load (777 ms) belongs to the original domain Isover.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 125.3 kB (28%)

Content Size

453.9 kB

After Optimization

328.6 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Isover.nl main page is 453.9 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 45% of websites need less resources to load. Javascripts take 258.1 kB which makes up the majority of the site volume.

HTML Optimization

-87%

Potential reduce by 109.1 kB

  • Original 125.8 kB
  • After minification 112.8 kB
  • After compression 16.7 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 109.1 kB or 87% of the original size.

Image Optimization

-12%

Potential reduce by 1.9 kB

  • Original 16.1 kB
  • After minification 14.2 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. Obviously, Isover needs image optimization as it can save up to 1.9 kB or 12% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-2%

Potential reduce by 6.2 kB

  • Original 258.1 kB
  • After minification 257.9 kB
  • After compression 251.9 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

-15%

Potential reduce by 8.1 kB

  • Original 53.9 kB
  • After minification 52.4 kB
  • After compression 45.8 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. Isover.nl needs all CSS files to be minified and compressed as it can save up to 8.1 kB or 15% of the original size.

Requests Breakdown

Number of requests can be reduced by 190 (94%)

Requests Now

203

After Optimization

13

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 203 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Isover. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 107 to 1 for JavaScripts and from 73 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

www.isover.nl

www.isover.nl

638 ms

google_tag.script.js

google_tag.script.js

45 ms

google_tag.script.js

google_tag.script.js

25 ms

google_tag.script.js

google_tag.script.js

388 ms

input-reset.css

input-reset.css

387 ms

core.css

core.css

30 ms

controlgroup.css

controlgroup.css

37 ms

checkboxradio.css

checkboxradio.css

29 ms

resizable.css

resizable.css

39 ms

button.css

button.css

31 ms

dialog.css

dialog.css

37 ms

blazy.css

blazy.css

402 ms

blazy.loading.css

blazy.loading.css

43 ms

views.module.css

views.module.css

43 ms

blazy.ratio.css

blazy.ratio.css

53 ms

eu_cookie_compliance.bare.css

eu_cookie_compliance.bare.css

44 ms

theme.css

theme.css

412 ms

addtoany.css

addtoany.css

49 ms

onecol.css

onecol.css

52 ms

threecol_section.css

threecol_section.css

56 ms

paragraphs.unpublished.css

paragraphs.unpublished.css

59 ms

better_exposed_filters.css

better_exposed_filters.css

58 ms

normalize.css

normalize.css

421 ms

normalize-fixes.css

normalize-fixes.css

86 ms

fonts.css

fonts.css

96 ms

table.css

table.css

101 ms

top-slider-layout.css

top-slider-layout.css

107 ms

top-slider-layout.css

top-slider-layout.css

111 ms

menu-settings.css

menu-settings.css

115 ms

progress.css

progress.css

484 ms

dialog.css

dialog.css

482 ms

collapse-processed.css

collapse-processed.css

477 ms

field.css

field.css

405 ms

tableselect.css

tableselect.css

408 ms

tabs.css

tabs.css

545 ms

ui-dialog.css

ui-dialog.css

413 ms

page.js

page.js

34 ms

messages.css

messages.css

409 ms

node.css

node.css

406 ms

global.css

global.css

398 ms

cls_fix.css

cls_fix.css

399 ms

global.css

global.css

492 ms

theme.css

theme.css

394 ms

01-typography.css

01-typography.css

668 ms

button.css

button.css

540 ms

footer-layout--basic.css

footer-layout--basic.css

460 ms

grid.css

grid.css

452 ms

icons.css

icons.css

548 ms

forms.css

forms.css

462 ms

cookie-banner.css

cookie-banner.css

460 ms

paragraph.css

paragraph.css

462 ms

field-title.css

field-title.css

559 ms

partners.css

partners.css

470 ms

partners.css

partners.css

566 ms

horizontal-anchor-links.css

horizontal-anchor-links.css

777 ms

sticky-block.css

sticky-block.css

497 ms

media-card.css

media-card.css

491 ms

related-conten-item.css

related-conten-item.css

494 ms

related-content-item.css

related-content-item.css

591 ms

arrows.css

arrows.css

491 ms

cta-grid-item.css

cta-grid-item.css

580 ms

basic-slider.css

basic-slider.css

327 ms

arrows.css

arrows.css

339 ms

basic-slider.css

basic-slider.css

304 ms

two-column-cta.css

two-column-cta.css

309 ms

facet-filter.css

facet-filter.css

385 ms

light-cta-carousel.css

light-cta-carousel.css

385 ms

account-navigation.css

account-navigation.css

296 ms

input-reset.css

input-reset.css

295 ms

main-navigation.css

main-navigation.css

303 ms

dropdown-menu.css

dropdown-menu.css

295 ms

header-layout.css

header-layout.css

299 ms

header-search.css

header-search.css

308 ms

color.css

color.css

403 ms

swiper-bundle.min.css

swiper-bundle.min.css

264 ms

block-solr-search.css

block-solr-search.css

348 ms

block-solr-search.css

block-solr-search.css

269 ms

menu-mouse-actions.css

menu-mouse-actions.css

303 ms

blazy.polyfill.min.js

blazy.polyfill.min.js

456 ms

jquery.min.js

jquery.min.js

669 ms

blazy.classlist.min.js

blazy.classlist.min.js

448 ms

blazy.promise.min.js

blazy.promise.min.js

428 ms

blazy.raf.min.js

blazy.raf.min.js

420 ms

once.min.js

once.min.js

417 ms

nl_FRgAUTKTGZCKwb8ph07fLSIlSyZtyMO301LCClHfBdk.js

nl_FRgAUTKTGZCKwb8ph07fLSIlSyZtyMO301LCClHfBdk.js

397 ms

drupalSettingsLoader.js

drupalSettingsLoader.js

368 ms

drupal.js

drupal.js

362 ms

drupal.init.js

drupal.init.js

361 ms

debounce.js

debounce.js

356 ms

version-min.js

version-min.js

353 ms

data-min.js

data-min.js

345 ms

disable-selection-min.js

disable-selection-min.js

339 ms

form-min.js

form-min.js

326 ms

jquery-patch-min.js

jquery-patch-min.js

255 ms

scroll-parent-min.js

scroll-parent-min.js

252 ms

unique-id-min.js

unique-id-min.js

270 ms

focusable-min.js

focusable-min.js

249 ms

ie-min.js

ie-min.js

243 ms

keycode-min.js

keycode-min.js

243 ms

plugin-min.js

plugin-min.js

417 ms

safe-active-element-min.js

safe-active-element-min.js

238 ms

safe-blur-min.js

safe-blur-min.js

259 ms

widget-min.js

widget-min.js

235 ms

labels-min.js

labels-min.js

233 ms

controlgroup-min.js

controlgroup-min.js

233 ms

form-reset-mixin-min.js

form-reset-mixin-min.js

224 ms

mouse-min.js

mouse-min.js

216 ms

checkboxradio-min.js

checkboxradio-min.js

205 ms

draggable-min.js

draggable-min.js

166 ms

resizable-min.js

resizable-min.js

166 ms

button-min.js

button-min.js

166 ms

dialog-min.js

dialog-min.js

176 ms

dblazy.min.js

dblazy.min.js

131 ms

blazy.dataset.min.js

blazy.dataset.min.js

98 ms

blazy.viewport.min.js

blazy.viewport.min.js

56 ms

blazy.dom.min.js

blazy.dom.min.js

42 ms

blazy.xlazy.min.js

blazy.xlazy.min.js

47 ms

blazy.observer.min.js

blazy.observer.min.js

55 ms

blazy.loading.min.js

blazy.loading.min.js

165 ms

blazy.webp.min.js

blazy.webp.min.js

58 ms

blazy.base.min.js

blazy.base.min.js

329 ms

blazy.min.js

blazy.min.js

67 ms

bio.min.js

bio.min.js

170 ms

bio.media.min.js

bio.media.min.js

184 ms

blazy.drupal.min.js

blazy.drupal.min.js

176 ms

blazy.load.min.js

blazy.load.min.js

271 ms

blazy.compat.min.js

blazy.compat.min.js

181 ms

index.umd.min.js

index.umd.min.js

194 ms

addtoany.js

addtoany.js

183 ms

ckeditor_exclude_tags.js

ckeditor_exclude_tags.js

183 ms

datalayer.js

datalayer.js

184 ms

ga4-init.js

ga4-init.js

184 ms

ga4-main.js

ga4-main.js

193 ms

js.cookie.min.js

js.cookie.min.js

279 ms

login-reload-back.js

login-reload-back.js

193 ms

user-cookie.js

user-cookie.js

194 ms

progress.js

progress.js

197 ms

loadjs.min.js

loadjs.min.js

199 ms

announce.js

announce.js

198 ms

message.js

message.js

209 ms

ajax.js

ajax.js

203 ms

ajax.js

ajax.js

207 ms

displace.js

displace.js

210 ms

jquery.tabbable.shim.js

jquery.tabbable.shim.js

235 ms

position.js

position.js

223 ms

dialog.js

dialog.js

218 ms

dialog.position.js

dialog.position.js

287 ms

dialog.jquery-ui.js

dialog.jquery-ui.js

205 ms

dialog.ajax.js

dialog.ajax.js

200 ms

ajax-links.js

ajax-links.js

301 ms

check-dom-loaded.js

check-dom-loaded.js

454 ms

css-vars-ponyfill.min.js

css-vars-ponyfill.min.js

218 ms

css-vars.js

css-vars.js

223 ms

01-typography.js

01-typography.js

297 ms

eu_cookie_compliance.min.js

eu_cookie_compliance.min.js

132 ms

menu-tracking.js

menu-tracking.js

219 ms

active-menu-link.js

active-menu-link.js

157 ms

jquery.ba-throttle-debounce.min.js

jquery.ba-throttle-debounce.min.js

265 ms

horizontal-anchor-links.js

horizontal-anchor-links.js

153 ms

horizontal-sticky.js

horizontal-sticky.js

158 ms

swiper-bundle.min.js

swiper-bundle.min.js

159 ms

related-content-carousel.js

related-content-carousel.js

166 ms

table.js

table.js

166 ms

light-cta-carousel.js

light-cta-carousel.js

172 ms

two-columns-cta.js

two-columns-cta.js

274 ms

better_exposed_filters.js

better_exposed_filters.js

164 ms

input-reset.js

input-reset.js

167 ms

main-navigation.js

main-navigation.js

171 ms

search-header.js

search-header.js

171 ms

navigation-functions.js

navigation-functions.js

171 ms

main-navigation.js

main-navigation.js

179 ms

dropdown-menu.js

dropdown-menu.js

269 ms

menu-mouse-actions.js

menu-mouse-actions.js

174 ms

header.js

header.js

170 ms

_Incapsula_Resource

_Incapsula_Resource

175 ms

Roboto-Regular.woff

Roboto-Regular.woff

156 ms

Roboto-Medium.woff

Roboto-Medium.woff

167 ms

Roboto-Light.woff

Roboto-Light.woff

167 ms

Roboto-Bold.woff

Roboto-Bold.woff

318 ms

Isover_Logo_small.png

Isover_Logo_small.png

197 ms

search.svg

search.svg

486 ms

close.svg

close.svg

432 ms

project.svg

project.svg

313 ms

right.svg

right.svg

468 ms

left.svg

left.svg

515 ms

shock_resistance.svg

shock_resistance.svg

512 ms

fire-protection.svg

fire-protection.svg

359 ms

sm.25.html

sm.25.html

16 ms

eso.BRQnzO8v.js

eso.BRQnzO8v.js

21 ms

protected-planet.svg

protected-planet.svg

447 ms

info.svg

info.svg

467 ms

doors-and-windows.svg

doors-and-windows.svg

499 ms

other-material.svg

other-material.svg

504 ms

education.svg

education.svg

537 ms

press.svg

press.svg

535 ms

time.svg

time.svg

535 ms

fb.svg

fb.svg

531 ms

linkedin.svg

linkedin.svg

561 ms

youtube.svg

youtube.svg

574 ms

instagram.svg

instagram.svg

644 ms

twitter.svg

twitter.svg

602 ms

Logo_Saint-Gobain.png

Logo_Saint-Gobain.png

512 ms

gtm.js

gtm.js

88 ms

gtm.js

gtm.js

139 ms

gtm.js

gtm.js

188 ms

_Incapsula_Resource

_Incapsula_Resource

324 ms

gtm.js

gtm.js

33 ms

gtm.js

gtm.js

39 ms

Accessibility Review

isover.nl accessibility score

89

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.

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

ARIA IDs are not unique

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

isover.nl 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

isover.nl SEO score

83

Search Engine Optimization Advices

Content Best Practices

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

Impact

Issue

High

Links do not have descriptive text

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

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    NL

  • Language Claimed

    NL

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Isover.nl can be misinterpreted by Google and other search engines. Our service has detected that Dutch is used on the page, and it matches the claimed language. Our system also found out that Isover.nl 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

isover.nl

Open Graph description is not detected on the main page of Isover. 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: