Oversized building quality issues are often heard, people creepy. The leakage, leakage, wall fall though small faults, but also enough to make people worry. Buyers do not necessarily know how to identify the quality of the building, then how to avoid the construction quality doubt? Going to see more useful, but buyers are not experts, and sometimes there is really no other way to keep in mind is to choose promising development companies.
How to distinguish the promise of developing a good company? In general, aluminum alloy box can be used to inquire about the sales of houses in the company over the years, promises from the banks, qualification level of the selected units, qualification level of the selected construction units and so on. The general sale of large banks promise good, the selection of the construction unit qualification level is preferred. Of course, the small amount of complaints received is also an important signal.
Home buyers in the collection of housing information, real estate developers or intermediaries where there will always be on the detailed information of the residence, chiefly we know about this district or this place who is the planning unit, with what kind of plan Qualification level; there is the total contractor of the construction unit which one, what are the engineering achievements; the project has won the Han award. Every year, Shanghai Municipality must carry out annual inspection and engineering excellence awards for the plans and construction units in Shanghai and other provinces and cities in Shanghai, so you can know this information through relevant newspapers and news at the time of your purchase.
In addition to the developer's promise, buyers prefer the more comfortable home from the Anji Aluminum box construction time to start inquiries. Often go to the site to see if its construction process is not standardized. Although buyers can not make all the difference between the control, but glimpse the whole panther, from a number of details can be roughly judged.
First, some foundation
On the hidden works, especially the foundation of our building ---- foundation, foundation approach is varied, for example, we see the most pile foundation, box foundation for high-rise residence, while the low-rise villas and more Layers of apartments generally use a strip foundation on it, of course, according to the local geological conditions to decide what method to choose Sha foundation. The basement or underground parking garage in the upper level is usually constructed using a box-shaped deep foundation. The foundation withstands all the loads in the upper part of the building, such as its own weight, furniture, people, etc., and transmits all its forces to the foundation reliably. It will resist the uneven settlement of the building. As we can see from time to time House wall cracking, floor deformation, water seepage roof and other quality problems may be due to the uneven foundation settlement, destroyed the stiffness of the house caused. The foundation and some other reinforced concrete members can not be seen after the house is built. However, these concealed works have the corresponding quality supervision at the time of construction and completion. Chen Chen and the completion inspection Chen said that after these statements, we You can verify the main body of the house quality and its safety features. On the contrary, assuming that developers or intermediaries can not supply us with this material, then we have reason to doubt the reliability of the dwelling. `
Second, the wall
The most intuitive thing we see first is the exterior wall of the house. The visual methods of distinguishing the quality of exterior wall construction can be divided into several situations. Suppose the exterior wall is decorated with veneer. The primary query is whether there is a fall or bump The appearance of the tile facing the seam is not steep vertical water, the color of the tile, the texture is not reconcile. Suppose the outer wall is coated with cement mortar and then waterproof coating, we have to check whether the cement mortar falls or cracks; water brick wall was used in more low-rise villa, this wall has a classical and severe meaning , We should pay attention to is clear water brick pointing is not full, brick is not dense. When inquiring the outer wall, there is a very important point to remind us that, if we find the cracks in the outer wall are penetrating, then the house must be in some aspects of planning or construction in doubt, please judge the quality of the house for some Always judge.
Multi-storey residential area in Shanghai is multifaceted, with masonry masonry as the main plan. External wall seepage is a quality common problem in multi-storey residences. Generally, there are several situations as follows: water seepage outside the wall, the site is generally at the top of the floor, That ring beam and prefabricated hollow slab lap area, due to the southeast of Shanghai to more winds, so the water seepage Dongshan wall more serious; seepage water outside the window frame, which is mainly the connection between the window frame and the wall is not dense , Waterproof function is not good and constitute; wall hole seepage, which is mainly left in the construction of the scaffolding hole is not tight and constitute the composition; balcony water seepage, balcony slab beam tilting down pan-water. So when we look at the room about to choose to go in the rain, check the outer wall of the seams, the wall has no obvious watermarks and moldy. In the water on the question we suggest that as far as possible not to choose decorative brick or mosaic as the decoration of the external walls, as the surface crevices of the simple crevice water seepage caused wall. On the wall in addition to check the availability of cracks, but also check the wall of the convexity and concavity, may not have a larger area of hollowing, cracking, and other water is not a straight line vertical steep wall is also an important symbol of the quality of the wall. On the kitchen and bathroom interior wall surface we generally use beautiful veneer to decorate the tile, check the tile is good or bad tips is to use a key to tap the tile, the tile is assumed to be more dense paste smaller and smaller movement, assuming Tiles paste density to teach the difference between the larger the more air. Use the key in a row or a row of stickers on the tiles, you can tell the difference between the quality of these ceramic tiles.
At that time, Shanghai encouraged the construction industry to use new type of wall materials, such as various lightweight concrete blocks, aerated concrete blocks, porous modulus bricks, etc., have greatly improved the quality of the internal and external walls for our supply Excellent live all the guarantees.
Third, the floor on the ground
The ground floor contains two meanings: one is the ground floor and the floor of the floor. On the first floor of the floor we have to determine whether this floor is precast plate is still cast. Low-rise and multi-storey house floor is mainly prefabricated components, we need to check the floor plank is not smooth, with or without cracks, it cracks for two reasons: First, the house ring beam is not steep layout uneven slurry ; Second, the quality of prefabricated panels, however, around too much.
High-rise, high-rise house floor is mainly cast-in-place board, cast-in-board integrity and waterproof are good, our first query is not a tendon or honeycomb surface appearance, the concrete strength level with the naked eye is the query Come out, we can see the quality inspection Chen said that if the quality of the concrete is too poor, the hand can pull out the local convex, for example, at the corner of the column is a good place to check.
It should be particularly emphasized here is the kitchen and bathroom floor it is necessary to cast the overall board, can not use the precast board, which is based on their extra waterproof needs to do, on the kitchen and bathroom floor we can close the water Test: irrigation depth of 20 to 30mm, insisted for 24 hours, assuming no seepage on the ground surface that is qualified. We also want to test the slope of this floor is not slope to the floor drain, there is no down slope and the appearance of water on the ground.
Ground floor we call the ground, the ground floor of the ground floor is generally higher than the outdoor floor 45 cm, which is three steps, there are 60 cm high to 90 cm, and in any case we must carefully check the moisture plan and Method. In the humid and rainy area to the south of Shanghai, the underlying moisture-proofing measures do not pass, but when the rain falls or the rainy season arrives, the ground and walls will "sweat". Long-term living in such an environment is not conducive to the health of the body.
Fourth, the roof
Roofing in our residential areas in the majority of the way is the flat roof and slope roof. The most important function of the roof is waterproof, thermal insulation. For households choosing the top floor, the roof is an important quality indicator. Chiefly we have to overcome one's own fear of heights, personally go to the roof to check, check the roof drainage slope, outlet, gutter arrangement is not reasonable, down the water pipe should be robust, smooth interface, no leakage. Roofing is nothing more than the entire cast-in-place and prefabricated two kinds of cast-in-place waterproofing board is much better than the precast board. Flexible waterproof in the waterproofing methods, that is, linoleum or waterproof coating; there are rigid waterproof, such as fine stone reinforced concrete pouring waterproof layer. The two waterproof methods have their own interests and disadvantages, even if the roof is made of flexible waterproof, but also use rigid waterproof, it can not guarantee 100% reliable. Roof leaks are mostly planned changes in the area today, such as the roof and wall joints, expansion joints, settlement joints and other parts. Roofing waterproofing has always been a big doubts about the stormy plan, construction units and users, many modern roofing waterproofing materials are endless, but I think roofing waterproofing quality depends mainly on the quality of construction, so we can ask the relevant technical staff Its plans, construction details to find out, so you can check the accuracy of inquiries. In addition to waterproofing, we must also pay attention to the insulation and insulation of the roof, usually in the roof to be provided overhead ventilation layer, which is conducive to air activities and cooling.
Fifth, the stairs
Stairs in residential buildings are mostly in-situ reinforced concrete plan, which is more messy in the house plan, but also reflects the level of planning and construction unit as a symbol. First of all, we should check step height is not together, how smooth step, there is no uneven or falling feeling, the foot is not in the above feel too narrow, each step is not feel too much step, the import height of the stairs is Not too low, the staircase handrail is not robust.
In middle and high-rise residences, the lifts are the prime examples of vertical transport. For general apartments, a set of passenger elevators (two) is provided for every 10,000 square meters, whereas for premium condos, a set of passenger elevators is required for every 7,500 square meters , The ratio of passenger elevators to freight elevators is 3: 1 or 4: 1, that is, 3 passenger elevators or 4 passenger elevators correspond to 1 freight elevator, and the utility elevator can double as a fire escape. The ease and convenience of taking the elevator is a difference norms, the elevator should be able to accurately start the work, the election layer, stop layer, traction machine noise and sensation shall not exceed the prescribed value, brakes, speed limiter, alarm and other safety equipment Should be actionable and reliable, in addition there should be emergency lights, help button, the elevator should have a closed-circuit monitor. The staircase at this time is the first major escape route in case of emergency. The stairway should not be too small in width. The stairway should have obvious signs, fire doors and fire fighting equipment such as fire extinguishers, fire head and water gun.
Six, windows and doors
Doors and windows are two enclosures in the house. The primary function is to provide the revenue and expenditure of transportation, to separate the contact building space, and to provide ventilation and lighting. The overall need of checking the doors and windows is that the equipment is stable, free of warp and deformation, Active, close tight, functional and reasonable, easy to repair, spare parts and equipment complete, accurate orientation.
Door and window materials commonly used in wood, steel, aluminum, plastic, glass and so on. Simple production of wooden doors and windows, suitable for processing, is a traditional method has always been widely used. Steel doors and windows high strength, small cross-section, less light, fire prevention, the use of steel windows and doors profiles continue to improve, constitute a variety of standardized products. General steel doors and windows easy to rust, weight, high thermal conductivity. Today, the newly developed aluminized fasting steel windows and doors, plastic-coated steel windows and doors, color steel doors and windows, hollow steel windows have greatly improved the anti-corrosion of steel doors and windows and energy-saving features, has been widely used in residential promotion.
Lightweight aluminum doors and windows, beautiful towering, airtight function is good, in the need of a higher house has been widely used. However, thermal conductivity of aluminum alloy, insulation is poor and high cost. At that time, better insulation materials, such as plastic made of plastic-made aluminum window can greatly advance the thermal function of aluminum alloy doors and windows. Plastic doors and windows good thermal function, fine processing, corrosion-resistant, is a promising type of doors and windows. At that time, the plastic windows and doors produced in our country were costly, the strength, rigidity and anti-aging function had yet to be improved. However, with the development of the plastics industry, the use of plastic doors and windows with high strength and aging resistance has reached more than 30 years and the plastic doors and windows will surely obtain More and more use.
Here we also stressed that the door should not be used plywood production, the door should be robust equipment, the bottom of the window, the floor of the public walkway windows, into the door of the bright should be installed iron fence; windows and doors should be flat surface, full of putty , Paste robust.
Seven, to the drainage equipment
The average supply of water pipes to every household is 15 millimeters. We first need to find out what the water supply method is for the residence, whether the roof is provided with a high level water tank or whether the water pump is to be used. If we have already made a decision on the levels, especially the top tenants, we must personally check the water pressure in the faucet at the far end of this home to see if it meets the initiating water pressure of the domestic water heater. Can not be, maybe you think you can equipment home pressurized pipe pump to deal with the lack of pressure doubt, but then the quality of all pressurized pipe pumps on the market can not be very good guarantee, frequent use of the process of initiation And stop, its life is short contrast, and very simple pipe rust out, affecting the quality of our water. In the renovation process, the water pipes are generally made of underground pipe, so in the equipment, we must make the pipe straight, minimize the interface, the pipeline to choose the recent journey. In the sealed tube, be sure to test the water test, check all the interfaces shall not leak.
Today, Shanghai residential drainage channels are no longer using the old cast iron pipe, and use the white new PVC pipe, which is light and solid material in the tube. The general indoor drainage riser should be set by the corner, the clear distance from the wall should not be greater than 50 mm. Restrooms, kitchen sewage pipes should be divided, out of the tube length should not exceed 8 meters, should not use ceramic tubes, plastic tubes. Floor drain, blowdown pipe interface, check the mouth shall not leak, pipe drainage necessary circulation. The choice of the bottom of the household, we must look at the drainage pipes, the system is not treated exceptionally, the underlying drainage system is not independent. Assuming that the sewer pipes on the ground floor do not accept drainage from all the above floors, there will be no blockage of the first floor due to improper use of the above households. Assuming the bottom of the pipeline and the above layers are connected, then we need to see its diameter is not larger in the first floor. After reading the interior, do not forget to look outside, the slope of scattered water, undercrowd is not smooth, septic tank is not too close from home and so on. Eight, electrical As our standard of living continues to evolve, the wide variety of home electrical appliances places a higher need on the power and equipment of the electrical wiring in their homes. The main household into the line of household power load to meet the needs of the planning norms, electrical wiring equipment should be smooth, robust, straight, the wall should be catheter. In the decoration process, all the lines are buried with insulated pipe threading. A number of sockets and switches should have a reliable ground wire. Phone lines, CCTV antennas are not registered on schedule. Equipped with air conditioners, washing machines, refrigerators, electronic water heaters, electronic gas stoves, electronic monitoring alarm system of senior residence should be checked with the distribution of electrical equipment is not working properly, all types of pipelines is not safe and reliable.