Core Web Vitals optimisation cost for a manufacturer website in Dublin

The verdict in three sentences

A slow industrial website loses rankings, but above all it loses quote requests from engineers who compare three suppliers in ten minutes. For a sensor manufacturer in Dublin showing an LCP of 5.2 s and an INP of 480 ms, the full project costs EUR 4,700 to 9,000 excl. VAT (audit plus optimisation) and takes 4 to 6 weeks. The expected outcome: LCP under 2.5 s, INP under 200 ms, and recovery of a large share of the 30 % of organic traffic lost.

Diagnosis: where the 5.2 seconds come from

On manufacturer websites the causes repeat themselves: uncompressed 4,000-pixel product images, a hero carousel, fonts loaded from three sources, blocking chat and ad-tracking scripts, and a heavy JavaScript product configurator. The 8 MB technical PDF datasheets linked from every product page add a separate problem: an engineer on a phone on the shop floor waits 15 to 20 seconds, then gives up.

Detailed cost of the engagement

The audit is billed separately because everything else depends on it: field measurements (CrUX data), analysis of page templates, prioritisation by expected gain. Optimisation then covers code, hosting and heavy content.

Rebuilding the datasheets is often the most profitable item: an HTML datasheet (specifications, measuring ranges, compatibility table) ranks for very precise searches such as 'pressure sensor 0-10 bar 4-20 mA output', whereas an 8 MB PDF is almost never indexed well. The PDF stays available, slimmed down to under 1 MB.

What to require so the gain lasts

An optimisation that degrades within three months is wasted money. Require a performance budget written into the contract (maximum page weight, number of third-party scripts), monthly monitoring of field data, and a simple rule for the marketing team: every new image goes through the compression pipeline. Budget EUR 150 to 300 a month for this follow-up.

Beware of unrealistic promises: Core Web Vitals are one ranking factor among many. Traffic recovery also depends on content quality. In most cases observed, a manufacturer site that turns green recovers 50 to 80 % of its loss within 2 to 4 months.

Mini case study

Ciarán, sales director of an 85-employee sensor manufacturer in Dublin, received 60 quote requests a month through the site before the drop, against 42 today. His conversion rate is 18 % and the average order is EUR 6,500 with a 35 % gross margin. The 18 lost requests represent about 3.2 orders and EUR 7,300 of margin a month. He commits EUR 1,600 for the audit and EUR 5,200 for optimisation, i.e. EUR 6,800 excl. VAT. If he recovers 70 % of the lost requests (12.6 requests, 2.3 orders, about EUR 5,200 of monthly margin), the investment pays back in under two months after stabilisation.

FAQ

Do we need to rebuild the whole site to pass Core Web Vitals?

Rarely. In 7 cases out of 10, targeted optimisation at EUR 3,500 to 7,000 is enough. A full rebuild (EUR 15,000 and up) is justified only if the CMS is obsolete or the theme cannot be slimmed down.

How long before Google reflects the change?

Google's field data is computed over a rolling 28 days. Allow 4 weeks after release for the metrics to turn green, then 2 to 4 months for the effect on traffic.

Should our technical PDFs disappear?

No, engineers still download them. We create one HTML page per product and keep a slimmed PDF under 1 MB, cutting download time by 90 %.

Is a CDN essential for a B2B site in Ireland?

For a European and UK audience, a CDN at EUR 40 to 90 a month often brings TTFB from 1.4 s down to under 0.5 s. It is one of the best cost-to-gain items of the project.

Who monitors the metrics afterwards?

Monthly monitoring at EUR 150 to 300 flags any page exceeding its performance budget before Google notices it.

Let's scope your project. Send us your site address and recent traffic figures, and we will price the audit and optimisation with a target of LCP under 2.5 s within 4 to 6 weeks. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.