Photovoltaic power generation into ordinary people's homes, people become electric boss, investment in power stations have income, power generation state subsidies, lying at home the sun for you to make money! Early attention, early benefit!
At present, in the national and local government policy support, distributed photovoltaic power generation system has become more and more widely used, becoming an important future development direction.
However, due to distributed photovoltaic power generation in the market introduction period, design, construction quality varies, photovoltaic roofing waterproofing problems are easily ignored, once the installation of waterproofing layer damage or even no waterproofing layer is easy to occur the leakage, not only affect the PV system more affect the normal use of the user's house.
So today we want to discuss the waterproofing of photovoltaic roofs.
How to set the waterproof roof
Roof waterproofing treatment follows the general principle of appropriate guide should not be blocked, that is, to ensure that the node processing in the stormwater can be smoothly let the water cascade off and protect the roof does not leak.
For the case of the original roof must be perforated to destroy, it is necessary to do according to local conditions, according to different situations to do different treatment, we look at the following categories.
Concrete flat roof waterproofing
For new construction of the concrete flat roof, usually in the design should be pre-buried bolts, in accordance with the conventional practice of waterproofing the roof. For existing buildings, when setting the base of photovoltaic components, a waterproof layer should be laid to the base and the upper part of the metal embedment, and do sealing around the foot bolt, wear waterproof layer with waterproof sealant fill, in addition to additional waterproof layer can be installed under the base, even if the top of the base leakage, rainwater will not reach the structural layer.
How to use chemical anchor bolts
For existing buildings with flat concrete roofs, if you use chemical anchor bolts to fix brackets, you should first confirm the thickness of the protective layer or the surface layer to be used. For prefabricated slab roofs with the large load-bearing unit areas, a concrete layer of a certain thickness can be poured on the roof, and chemical anchor bolts can be used to fix the brackets after curing.
For the sloping roof covered with tiles, the drilling depth should be confirmed, and after fixing the chemical anchor bolts, the position of the bolts through the tiles should be well treated with waterproof sealant. Chemical anchor bolts have the advantages of large load-bearing capacity, fatigue resistance, aging resistance, no expansion force on the substrate, no extrusion stress, therefore, will not cause adverse effects on the roof waterproofing.
Metal roofing waterproofing
For metal roofing, the steel structure of the photovoltaic system needs to penetrate the original waterproofing layer and pressure-type steel plate, fixed on the main steel structure of the building; then refer to the metal roofing waterproofing practices, vapor barrier, insulation, and waterproofing treatment. The focus of construction is to remove rust and corrosion, sealing, the grass-roots level, and the periphery of the waterproof coating.
For the local leakage point of metal roofing, the high-quality neutral weatherproof sealant should be used to apply and seal; for the color steel plate with serious local rusting, it needs to be replaced before the installation of PV modules.
Therefore, the installation design of photovoltaic modules should not only consider sunlight and shadow, but also load-bearing, drainage, and waterproofing issues are equally important.
