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Wi-Fi site survey: measure before investing in business wireless

A site survey measures the real Wi-Fi coverage of a space and tells you how many access points you need and where. It is the difference between buying hardware and buying coverage.

Updated 15 October 20262 min read

More than 10 workstations · support contract · remote, on-site and phone support

At a glance

For decision-makers short on time.

  • 01A Wi-Fi site survey measures real wireless coverage and shows where signal is strong, weak or absent.
  • 02A predictive survey plans access points from the floor plan; an on-site survey diagnoses a live network.
  • 03You receive a heat map, interference analysis and a recommended access point plan.
In this article

A Wi-Fi site survey is the technical measurement of wireless coverage in a space, carried out before installation or to correct an enterprise wireless network. It shows where the signal is strong, weak or non-existent, what is causing interference and how many access points are needed, and in what position.

What a site survey measures in a business wireless network

Using dedicated tools, the technician walks the space and records the strength and quality of the signal in each zone. The result is a heat map: a floor plan in colours showing the real coverage, without interpretation.

The survey also reveals congested channels and sources of interference.

Predictive survey or on-site survey?

  • Predictive: carried out on the floor plan, before any installation exists. It is used to plan the number and location of access points.
  • On site: real measurements in the field. It is the most rigorous method and the right one for diagnosing an existing network.

The right moments to ask for one

  • New premises Before installing Wi-Fi, to avoid dead zones and surplus equipment.
  • Recurring complaints When coverage or speed always fail in the same places.
  • Move or refurbishment New walls change the way the signal propagates.
  • Growth More people and more devices call for a different density of access points.

What you receive at the end

  • Heat map The real coverage of the whole area.
  • Dead zones Identified, along with areas of weak performance.
  • Interference Analysis of channels and sources of noise.
  • Access point plan Recommended number, model and position.
  • Report Clear conclusions and next steps to support the decision.

Frequently asked questions

Does a small office justify a site survey?

Yes. It avoids buying too much or too little equipment, and correcting a poorly sized installation costs more than the diagnosis.

Can the survey be used to plan before building work?

Yes. A predictive survey, carried out on the floor plan, shows how many access points are needed and where they go, before any cable or equipment is installed.

What document do I receive?

A report with the heat map, conclusions and practical recommendations, which serves as the basis for the decision and for installing the wireless network.

Next step: measure your Wi-Fi network

DataRoad - IT Services and Consulting carries out coverage surveys and optimisation for managed enterprise networks: Wi-Fi site survey and optimisation. No-obligation proposal for companies with more than 10 workstations · support contract · remote, on-site and telephone support.

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