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What should be noted when installing solar mounting system on a flat roof?

April 21 , 2026

The application field of flat roof photovoltaic support system is wide, covering multiple fields such as residential buildings, commercial buildings, industrial plants, etc. Among them, residential buildings have become the main source of demand for flat roof photovoltaic support systems due to their huge market demand and vast market space, accounting for about 40% of the market share.

pre-assembled flat roof solar bracket kits for fast installation

Faced with numerous photovoltaic bracket solutions, the following are three aspects that need to be paid attention:

1. Avoid flat placement of solar panels: Installing modules in a flat manner can easily accumulate dust, resulting in loss of power generation, inconvenient cleaning, and difficulty in removing accumulated water. It is also difficult to remove dust through natural rainfall. It is recommended to make a certain inclination angle when laying flat, usually 5-10 degrees, while facing towards the optimal orientation.

IEC 61215 certified flat roof solar mounting structures for high wind zones

2. Consider the issue of obstruction: The power generation efficiency of solar panels is highly dependent on direct sunlight, and if they are obstructed by trees, buildings, etc., it will seriously affect the power generation efficiency. Before installation, shadow obstructions should be eliminated. If the obstruction source cannot be removed, consideration should be given to changing the installation site.

flat roof solar panel stands with integrated waterproof seals

3. Pay attention to roof structure and waterproofing issues: The weight of photovoltaic panels and solar mounting structures may put pressure on old or structurally weak roofs. The long-term load caused by installing PV brackets may lead to fatigue and potential damage to the roof structure. Some solar roof brackets require drilling holes on the roof during installation, which can damage the original waterproof layer and increase the possibility of water leakage. So before installation, it is necessary to evaluate and repair the roof structure and waterproof layer.

For the installation of flat roof solar brackets, commonly used are ballast type and concrete foundation mounting brackets type. CORIGY has more than 15 years of experience in photovoltaic bracket design and production, and can provide various professional design solutions based on the load-bearing capacity of the roof to ensure that the bracket installation is simple, firm, and efficient in generating electricity within safe wind speeds.

Product Categories
Ground Mounting System

Corigy Solar Ground Mounting Racking System Structure is widely applied for landfll, open space or sloping terrain, etc, Diferent kinds of material can be offered for any needs, such as galvanized steel, anodized aluminum and ZAM materials.

Flat Roof Mounting System

Flat roof solar mounting systems offer robust support and easy installation for solar panels on flat roofs. These systems ensure maximum energy capture, durability, and cost-efficiency, making them ideal for residential and commercial properties. Corigy flat roof solar panel mounting system, such as ballast mount, east-west ballast mount, etc. Contact us to learn more!

Metal Roof Mounting System

Install solar panel on the metal roof by standing seam, klip-lok, L foot or other clamps.

Tile Roof Mounting System

Install solar panels on tile roof by hooks and L foot etc.

Carport Mounting System

Carbon Steel Solar Carport Mounting Structure

Grounding Screw / Pile

Grounding screw for ground mounting structure

RV Mounting System

Portable easy install solar panel mounting bracket for RV or yacht

Solar Mounting Accessories

Solar mounting accessories such as end/mid clamp, cable clip, grounding items, etc.

Balcony Mounting System

Install solar panel on balcony fence by Corigy balcony hooks

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