Roof Structural Survey: Ensuring the Safety and Longevity of Your Solar Power Plant
Installing a solar power plant (SPP) is a strategic decision that allows you to significantly reduce electricity costs and increase energy independence. However, before ordering equipment and hiring an installation crew, it is necessary to conduct a survey of the roof’s structural elements. This is not just a formality, but a critically important stage that guarantees the safety, reliability, and longevity of the entire system. A technical survey of roof structures for solar panel installation allows for assessing the condition of the roof, its ability to withstand the additional load from the panels, and determining the necessary measures for safe installation.
Why a Roof Structural Survey is Mandatory
Many homeowners and businesses mistakenly believe that if there is enough free space on the roof, solar panels can be installed without any additional checks. In reality, the load-bearing capacity of a roof depends on many factors: building type, year of construction, roofing material, condition of metal or reinforced concrete structures, presence of corrosion, cracks, deflections, and other defects. A single solar panel may weigh 20–30 kg, but the final conclusion is made not based on the weight of a single module, but on the total load per square meter of the roof and the structures’ ability to bear it. For business, a technical roof survey is mandatory in several cases:
- When changing the load on structures — installing an SPP creates additional permanent and wind loads on the roof, so a survey is mandatory to confirm reliability.
- For objects with a service life of over 20–30 years — old buildings may have worn-out load-bearing elements, corrosion of metal structures, cracks, or deformations.
- For commercial and industrial objects — legal entities installing an SPP for selling electricity or ensuring production are required to comply with increased safety requirements. Without a survey, it is impossible to pass expertise or obtain permits.
What is Included in a Roof Structural Survey
A comprehensive technical roof survey for an SPP includes several key stages:
- Assessing roof load-bearing capacity — engineers check the strength and stability of roof structures to ensure they can withstand the weight of solar panels and mounts.
- Roof material analysis — the material (metal, tile, slate, etc.) and its condition are assessed to select optimal mounts.
- Studying roof slope and orientation — this affects solar system efficiency. The ideal position for panels is with maximum orientation to the south.
- Checking waterproofing — assessing whether the panel installation will damage the roof’s water resistance.
- Assessing wind loads — since solar panels can create additional wind resistance, it is necessary to calculate whether the roof can withstand increased loads.
Main risks when installing an SPP without a roof survey. Ignoring roofing condition before mounting photovoltaic modules is the most expensive mistake homeowners make. Common risks include:
- overloading floor slabs or the rafter system, which can lead to deformation and destruction of structures;
- deformation of metal trusses and other load-bearing roof elements;
- damage to the waterproofing layer, leading to leaks and additional repair costs;
- insufficient strength of mounts, which can cause panels to break off during strong wind gusts;
- inability to obtain a technical report for SPP registration and electricity sales.
Technical roof survey for SPP from GlobalBud Ukraine is a guarantee of your solar power plant’s safety.
When a Technical Roof Survey is Mandatory
According to Ukrainian legislation, in particular the Law “On Regulation of Urban Planning Activity” and industry-specific DBN, surveying structures is mandatory in a number of cases:
- When changing the load on structures — installing an SPP creates additional permanent and wind loads on the roof.
- For objects with a service life of over 20–30 years — old buildings may have worn-out load-bearing elements, corrosion of metal structures, cracks, or deformations.
- For commercial and industrial objects — legal entities installing an SPP for electricity sales or production assurance are required to comply with increased safety requirements.
- By requirement of the designer or control bodies — even if the object is new, confirmation of the actual condition of the structures may be required.
Comprehensive engineering survey allows for obtaining a complete picture of the object’s technical condition and avoiding unpleasant surprises in the future.
Frequently Asked Questions
Is it mandatory to conduct a structural survey of a private house roof?
For private, garden, and country houses, a survey is not mandatory by law. However, specialists recommend conducting it to ensure structural safety and avoid possible future problems.
How long does a roof structural survey take?
The duration depends on the roof area, structural complexity, and the volume of necessary research. On average, a visual and instrumental inspection takes from 2 to 4 hours, and preparing the technical report — up to 3 working days.
What documents confirm the results of a roof survey?
The results of the survey are compiled into a technical report — an official document that contains an assessment of the building’s technical condition, an analysis of the SPP’s potential impact on structural strength, stability, and rigidity, and recommendations on the possibility of equipment installation.
