Designing Wi‑Fi without a site survey is like building a house without geotechnical investigation. Plans alone do not reveal groundwater, soil conditions, or slope stability. Likewise, intuitively placing access points leaves coverage to chance.
A professional survey helps control costs, avoid coverage gaps, and deliver a network suited to the site.
What a Wi‑Fi site survey reveals beyond visual estimates
A Wi‑Fi site survey assesses a site with specialized equipment and software. Engineers investigate coverage and interference using RF measurements rather than visual assumptions.
An engineer uses professional measurement tools and software such as Ekahau or TamoSoft to map the RF environment.
On-site work includes:
- Visual inspection: search for non-obvious obstacles – metal structures, mirror surfaces, thick load-bearing walls, which look like ordinary partitions on the plan;
- Instrumental measurements: the spectrum analyzer shows the real noise level, frequency channel congestion, interference from neighboring networks and industrial equipment;
- Clarification of the business task: it is often found that different areas of the site have fundamentally different requirements for the network.
Without field assessment, design decisions rely on assumptions. Metal reinforcement or foil-backed insulation can heavily attenuate 5 GHz signals even when a wall looks ordinary. Measurements reveal the effect.
Five conditions that drawings may not reveal
Drawings show geometry, but actual radio propagation depends on materials and site conditions. Engineers may encounter:
Hidden metal structures in warehouses and production buildings that block or reflect signals;
The mirrors and the windows. Large mirrors and display windows in hotels and shopping centers often have metallic coatings. For radio waves, these become reflective barriers that create complex interference patterns.
Interference from microwave ovens, wireless cameras, Bluetooth devices, motors, welding equipment, and variable-frequency drives;
Neighboring networks competing for the same channels in apartment buildings and business centers;
Dense crowds in waiting areas and conference rooms, where people’s bodies absorb and alter radio signals.
Three Types of Wi‑Fi Site Survey: What to Choose for Your Facility
Three main approaches are used:
1. Passive site survey
An engineer walks around the site with a measurement device that monitors the RF environment, recording signal levels from existing access points where present, noise levels, channel utilisation and the number of neighboring networks.
Useful for modernization, troubleshooting, and checking requirements.
2. Active site survey
The engineer connects a test client to an access point and measures latency, upload and download rates, packet loss, and roaming along a route.
Useful for latency-sensitive applications, including IP telephony and video conferencing, and for roaming verification.
3. Predictive site survey
The engineer models coverage remotely using plans and virtual access points in RF planning software.
Useful for preliminary budgets, inaccessible sites, and large areas.
We use predictive modeling as a starting point. The final design should also draw on an active or passive on-site survey to account for conditions absent from drawings.
The financial value of measured design inputs
A survey helps customers make informed infrastructure investments.
- Lower capital expenditure. Without field data, a design may include 20–30% more access points as a precaution. An accurate coverage assessment helps determine the required equipment count.
- Lower operating expenditure. A well-designed network means fewer complaints, maintenance visits, and support tasks.
- Less post-installation rework. Networks built without a survey may later need extra access points and reconfiguration, adding cost and delay.
How Connectum conducts a Wi‑Fi site survey
Connectum conducts surveys before project work and also offers them separately for diagnostics or site assessment.
Our process is:
- Primary planning and computer modeling. Using floor plans or site maps, your technical specification and the traffic type (internet only, voice or video), we run a predictive model. We produce an expected coverage map, select access point and antenna models, and estimate the initial budget.
- Site visit. Engineers bring a spectrum analyzer, test access point, and tablet for recording data.
- Visual inspection: document non-obvious obstacles that are not visible on the plans.
- Field measurements. We refine the model by temporarily placing access points and measuring throughput, noise, and interference.
- Placement testing. We move the test access point to identify suitable locations.
- Report and budget estimate preparation. As a result, you get a document with a “heat map”, a list and layout of equipment, a specification, as well as a final estimate.
- (Optional) Audit the network after installation. After installation, we check whether the actual indicators correspond to the design.
Conclusion
Site conditions need to be measured and incorporated into the design.
A site survey helps you:
- Justify investment and understand what you are paying for;
- Avoid unexpected problems (“there is no signal here, although the design said there should be”);
- Reduce the budget without loss of quality.
Connectum surveys sites ranging from mines to hotels. Surveys are included in our projects; an independent audit can be commissioned separately.
Leave a request to discuss a measured assessment of your site. Our engineers will visit, take measurements, and explain the RF conditions.