What Is a Cold Roof?

Roof energy conservation mainly includes thermal insulation roofs, roof leveling slopes, ventilation roofs, planting roofs (green roofs), water storage roofs, and other new roofs.

Roof energy saving

Definition: The popular definition in the world is that all the planting techniques are separated from the earth s atmosphere. It covers not only roof planting, but also terraces, rooftops, balconies, walls, the top of underground garages, overpasses, and so on. Greening of special spaces connecting various buildings and structures. It is a form of constructing a green landscape on the top of a building and all special spaces through certain skills, according to the characteristics of the roof structure of the building, the load and the ecological environmental conditions on the roof. New highlights and new stages of garden development.

Classification: Generally divided into 3 categories, green vegetation only for solving urban ecological benefits, roof lawns that are both ecological and ornamental, and roof greening for viewing, rest, and activities. Among them, the roof greening of viewing, rest, and activity is based on the actual load tolerance and the roof ecological environment and functions. The greening of the roof is divided into two forms: first, simple and light greening, mainly lawns, and more configurations. Plants such as ground covers and flowering shrubs emphasize the color of the landscape. Patterns are configured with different varieties of plants, and paving patterns are combined with the walkway tiles. The second is garden-type compound greening, which is similar to ground garden green space. Adopting internationally accepted waterproof barrier roots, new water storage and drainage technologies, new equipment and new technologies, a reasonable combination of flowers, flowers, landscapes, and pavilions can be used to decorate gardening sketches, but the hard paving is less and the building must be strictly observed Design load and support allowable principle.

effect:

(1) From the perspective of urban environment:

a) Improve the urban environment and climate, alleviate the "heat island effect" of the city, adjust the temperature and humidity of the city, and the green plants on the roof can play a significant role in regulating the temperature. It can both regulate the temperature of the building itself and reduce the surrounding environment of the building. Temperature can also greatly reduce the average radiant temperature on the outer surface of the roof and improve the thermal environment of the city;

b) Greening plants can retain dust in the air, have the functions of dust retention, sterilization and absorption of low-concentration pollutants and increase negative ions in the air, have strong air purification ability and fresh ability, to achieve the effect of air purification;

c) Alleviate the stagnant water, floods and other various geological disasters caused by heavy rain, and mitigate the harm of acid rain;

d) Create a suitable growth environment for birds, insects, etc., which is conducive to the protection of biodiversity;

e) With good ecological benefits, it can improve the ecological environment of the city and increase the overall aesthetic sense of the city, improve the quality of the living and working environment of the citizens, and achieve the purpose of coordination, coexistence and development with the environment; meanwhile, it can also improve the use of land and resources rate;

(2) From an architectural perspective:

a) Improve the appearance of the building and cover the roof or wall that affects the visual effect;

b) Alleviate the damage caused by roof cracks caused by the thermal expansion and contraction of buildings, and the aging and leakage of waterproof layers caused by ultraviolet rays;

c) Effectively reducing the temperature on the surface of the roof structure layer can effectively reduce the energy consumption of air conditioning in summer and improve the indoor thermal environment, which is of great significance for energy saving of building equipment and improving the indoor thermal comfort environment of roof houses to achieve the purpose of energy conservation;

d) in the event of a fire, it plays a role in protecting buildings and delaying combustion;

e) For commercial buildings, the purpose of improving the environment and attracting passenger flow can be achieved;

f) For buildings such as office buildings and factory buildings, the building space can be used to the maximum, and a "roof garden" for employees to take a nap;

(3) From the perspective of the user:

a) Improve the surrounding environment, block the line of sight, and protect privacy;

b) can reduce noise and wind, and can effectively reduce sunlight reflection on the wall of the building;

c) Greening the environment can relieve people's mental and physical tension and fatigue;

d) provide a place for people to carry out cultivation and horticultural activities, enrich people's lives, and cultivate their love;

Definition: Light roof greening, also known as lawn-type roof greening or simple roof greening, because it can achieve low roof load requirements, simple management, low maintenance costs, and simultaneously achieve both ecological and landscape effects, suitable for large areas Popularization and application, so the government and the market attach great importance to technology as soon as it is proposed. Light roof greening is currently the largest roof greening method.

Technical indicators:

Lightweight and simple, it can achieve rapid construction and immediate results.

The construction cost is low, less than 30% of the general roof greening; the management is convenient. After construction, only a few watering, fertilization, pruning, prevention and control of diseases, insects and weeds and other management measures can maintain the effect of perennial and long-term landscape.

No trouble seeping. The lawn root system is weak and non-penetrating, even if there are small cracks on the roof, it will not cause it to expand and cause water seepage; the lawn plants are short, and there is no need to worry about the strong wind blowing on the tall plants, which will cause damage to the roof structure; The covering of the layer will protect the original waterproof layer and prolong the service life.

effect:

(1) Light pollution can be controlled, and green roofs can block light pollution pathways.

(2) Thermal pollution can be controlled. Can reduce heat island effect and power consumption.

(3) Secondary pollution of air and dust can be reduced. Large area roof greening can make the suspended matter have a foothold, control the suspended matter to cause secondary floating in the high-rise, so as to achieve the purpose of reducing urban space suspended matter and improving air quality.

(4) It can buffer urban ground drainage pressure.

(5) Large-scale light roof greening can play an ecological role and change the bird's-eye view of the city.

(Soil layer: 25 cm)

Vegetation grow

Soil layer Nutirtion

Fleece backing

E-PVC / TPO coil E-PVC / TPO root-resistance waterproof membrane

Drainage board and Filtercloth

Insulation board (XPS / EPS / PU / Rock wool)

Ap Vapor barrier

Concrete roof

Definition: "Cold roof" also known as "white reflective roof" refers to the roof with high solar reflectance. It applies light-colored, high-reflective paint to ordinary roofs to increase the solar reflectance of the roof and reduce solar heat Absorption, so as to reduce the cooling load of the air conditioner and save the energy consumption of the air conditioner.

Role: It can reduce the energy consumption of air conditioners; it can control the "heat island" phenomenon; protect the "ozone layer", the roof material ages slowly, and the use time is longer.