Use thermal insulation and reflective materials to achieve thermal insulation and energy saving effect
Roof energy conservation mainly includes thermal insulation roof, flat roof to slope roof, ventilated roof, planting roof (green roof), water storage roof and other new typesroof。
It is mainly to lay or paint various thermal insulation and reflective materials on the roof to achieve the effect of thermal insulation and energy saving.Except adoptingExpanded perlite, glass wool and polystyrene foam, etcThermal insulation materialIt also includes roof reflective cooling and thermal insulation roof (painted with aluminum silver powder or coiled material with aluminum foil on the surface), thermal insulation reflective film roof (paved on the roofAluminium titanium alloyAir cushion film, which can block more than 80% of visible light)Cooling coatingRoof (viaThermoplastic resin/Thermosetting resin+High reflectivity transparencyInorganic materialsmakeHeat reflective coatingTo cool down) and energy-saving roof tile roof (spraying reinforced cement on foamThermal insulation materialAbove).
Roof flat to slope
"Flat to slope" refers to a house that transforms the flat roof of a multi-storey residential building into a pitched roof, and refinishes the external facade, so as to improve the residential performance and the visual effect of the building appearance, under the conditions of building structure permissionrepairBehavior.
Ventilated roof
It refers to that a ventilated air interlayer is set on the roof, and the air flow in the interlayer is used to take away heat and reduce the roof surface temperature.
Water storage roof
The water storage roof isRigid waterproof roofThe purpose of storing a layer of water on the roof is to take away a large amount of heat in the water layer and consume a large amount of solar radiation heat exposed to the roof when the water evaporates, thus effectively weakening the heat transfer of the roof and reducing the roof temperature. It is a good heat insulation measure and an effective way to improve the thermal performance of the roof.
Other new roofs
More often, intelligent technology and ecological technology are used to realize the desire of building energy conservation, such asSolar collectorRoof and controllable ventilation roof, etc.
Roof greening
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Definition: The international popular definition is that all planting technologies are separated from the local atmosphere. It covers not only roof planting, but also the greening of special spaces of various buildings and structures that are not connected with the natural soil on the ground, such as terraces, rooftops, balconies, walls, the top of underground garages, overpasses, etc.It is a form of building green landscape on the top of buildings and all special spaces by selecting plant materials with growth habits according to the structural characteristics, loads and ecological environment conditions on the roof of buildings. It is a new highlight and new stage of the development of contemporary gardens.
Classification: generally divided into three categories, which are only for green vegetation that can solve urban ecological benefits, roof lawns that are both ecological and ornamental, and those that integrate viewing, rest and activitiesRoof greening。From the perspective of building load tolerance and the reality of roof ecological environment and functions, the roof greening, which integrates sightseeing, recreation and activities, can be divided into two forms: one is simple and light greening, mainly lawn, equipped with a variety of ground covers, flowers, shrubs and other plants, and emphasizing landscape color.Use different kinds of plants to configure patterns, and combine with sidewalk bricks to pave patterns.The second is garden type compound greening, which is similar to the ground garden green space.The internationally accepted waterproof barrier root, new technology of water storage and drainage, new equipment, new technology, reasonable combination of trees, shrubs, flowers, rocks, water, pavilions, corridors and pavilions can be used to decorate garden pieces, but the hard pavement should be less, and the principle of building design load and support should be strictly observed.
effect:
(1) From the perspective of urban environment:
(a) Improve the urban environment and climate, alleviate the "heat island effect" of the city, and regulate the temperature and humidity of the city. The green plants on the roof play an obvious role in regulating the temperature. They can not only regulate the temperature of the building itself, but also reduce the temperature of the surrounding environment of the building, and can also greatly reduce the average radiation temperature of the outer surface of the roof, improving the urban thermal environment;
(b) Greening plants can retain the dust in the air, with the functions of dust retention, sterilization, absorption of low concentration pollutants and increase of negative ions in the air, and have strong air purification and freshness capabilities to achieve the effect of purifying the air;
(c) Alleviate the waterlogging, flood and other geological disasters caused by rainstorm and mitigate the harm of acid rain;
(d) Create suitable growth environment for birds, insects, etc., which is conducive to biodiversity protection;
(e) With good ecological benefits, it can improve the ecological environment of the city and increase the overall aesthetic feeling of the city, improve the quality of the living and working environment of citizens, and achieve the goal of coordination, coexistence and development with the environment;At the same time, it can also improve the utilization rate of land resources;
(2) From an architectural perspective:
(a) Improve the appearance of buildings and cover roofs or walls that affect visual effects;
(b) Mitigate damage caused by roof cracks due to thermal expansion and contraction of buildings, and aging and leakage of waterproof layer caused by ultraviolet rays;
(c) Effectively reducing the surface temperature of the roof structure layer can effectively reduce the energy consumption of air conditioning in summer and improve the indoor thermal environment, that is, it is of great significance for building equipment to save energy and improve the indoor thermal comfort environment of roof houses to achieve the purpose of energy conservation;
(d) In case of fire, it can protect buildings and delay combustion;
(e) For commercial buildings, the purpose of improving the environment and attracting passenger flow can be achieved;
(i) For buildings such as office buildings and factory buildings, the building space can be maximized to build a "roof garden" for employees to rest;
(3) From the user's perspective:
(a) Improve the surrounding environment, block vision and protect privacy;
(b) It can reduce noise and prevent wind, and effectively reduce the sunlight reflection of building walls;
(c) Greening environment can alleviate people's mental and physical tension and fatigue;
(d) Provide people with places for cultivation and gardening activities, enrich people's life, and cultivate their feelings;
Light roof greening
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Definition: LightRoof greeningIt is also called lawn roof greening or simple roof greening. Because it can not only meet the requirements of low roof load, simple management, low maintenance costs, but also achieve both ecological and landscape effects, and is suitable for large-scale promotion and application, the government and the market attach importance to the technology as soon as it is proposed.Light roof greening is the roof greening method with the largest area.
Technical indicators:
It is light and simple, and can achieve the effect of rapid construction and immediate effect of building a flat at one time.
Low construction cost, less than 30% of general roof greening;The management is convenient. After construction, only a little watering, fertilization, pruning, pest control and other management measures are needed to maintain the perennial and perennial landscape effect.
No water seepage trouble.The adopted lawn root system is weak and has no penetration, so even if the roof has small cracks, it will not expand and cause water seepage;The lawn plants are short, so it is unnecessary to worry about the damage of roof structure caused by strong wind blowing on tall plants;Moreover, because of the covering of the total planting layer, the original waterproof layer will be protected and the service life will be extended.
effect:
(1) It can control light pollution, and green roofs can block the way of light pollution.
(2) Thermal pollution can be controlled.It can reduce heat island effect and electric energy consumption.
(3) It can reduce the secondary pollution of air dust.large areaRoof greeningIt can make the suspended solids have a foothold and control the secondary floating of suspended solids in the high-rise, so as to reduce the suspended solids in urban space and improve the air quality.
(4) It can buffer the urban surface drainage pressure.
(5) Large area light roof greening can play an ecological role and change the urban bird's-eye landscape.
Heavy roof greening
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(Soil layer: ≥ 25cm)
① Vegetation growth
② Soil layer
③ Fleece backing
④ E-PVC/TPO coiled material E-PVC/TPO root resistance waterproof membrane
⑤ Drainage board and filter cloth
⑥ Insulation board (XPS/EPS/PU/Lock wool)
⑦ Vapor barrier
⑧ Concrete roof
Cold roof
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Definition: "Cold roof", also known as "white reflective roof", refers to the roof with high solar reflectivity. It improves the solar reflectivity of the roof and reduces the absorption of solar heat by painting light colored and high reflective coatings on ordinary roofs, so as to reduce the cooling load of air conditioners and save energy consumption of air conditioners.
Function: reduce the energy consumption of air conditioning;The "heat island" phenomenon can be controlled;To protect the "ozone layer", the roof materials are aging slowly and have a long service life.
