First of all, top advantages
1, wide field of vision
The floor is high, the view is wide, and the scenery is good where the line of sight can reach.
2. Good lighting and ventilation
Less front and rear barriers, transparent rooms and good ventilation and lighting effects.
3, no noise interference
Relatively speaking, the living environment is relatively quiet, and there is no noise interference caused by upstairs residents' activities.
4. Good air environment
Generally, there are fewer particles in the top air, the environment is relatively clean and the air pollution index is low.
5. Good confidentiality
Good privacy, more personal space.
6, the price is cheap
Usually the house on the top floor is relatively cheaper.
Second, the top shortcomings
1, easy to leak and leak
The top floor is more prone to waterproof problems. If the roof is not well waterproof, it is easy to have water seepage and leakage problems.
2. Poor thermal insulation
There are no residents upstairs, and the house on the top floor will have poor thermal insulation performance. Leng Xia fever in winter is an obvious disadvantage.
3. Insufficient water pressure and electricity.
In summer, when the water consumption is large, it is easy to stop water supply when the water pressure is low, and the water and electricity consumption will be more.
4. High cost
One of the most easily overlooked shortcomings of the top floor is the high property fee, and high-rise residential buildings need more expenses in terms of pool and elevator operation fee.
5. It is inconvenient to go upstairs and downstairs
If there is a power outage in the community, it is extremely inconvenient to go upstairs and downstairs, which is not suitable for the elderly and children to live in.
Third, the analysis of the most important water seepage pain point at the top floor
When it comes to the top floor, the most common concern should be waterproof and thermal insulation. Because these are the two major pain points at the top, and they are basically inevitable.
Why is it inevitable that the top floor leaks water?
A professional engaged in construction management said that the roof consists of many floors, but the most important one is three floors. The bottom floor is called the structural floor, which is the cast-in-place concrete floor. The middle layer is insulation layer, and the mainstream uses polystyrene foam, commonly known as extruded board. The top floor is generally painted or asphalt coiled material, and asphalt coiled material is the majority.
In fact, water leakage is related to the process of these three layers, or it has a lot to do with the details.
The asphalt coiled material above is actually very waterproof, and there is no problem after 20 years. However, the coil has a standard size, so it must be spliced in the actual laying process, which is prone to cracks, and most construction teams can't handle it well in this link. Rain easily leaks through these gaps.
Once the insulation layer is eroded by rain, the insulation effect will be greatly reduced, because the thermal conductivity of water is much higher than that of insulation materials. Moreover, the rainwater is covered with asphalt layer and is not easy to evaporate. After a long time, the life of the insulation layer will also decay rapidly, and the insulation effect will naturally be poor.
The most critical thing is the structural layer, that is, the cast-in-place floor. As far as roof waterproofing is concerned, the waterproof material on the surface can only play an auxiliary role, and the self-waterproof function of the floor is the most critical. The common indoor floor thickness is generally 100mm, while the roof thickness is generally120 mm. Conscious developers can increase the roof thickness to 140mm at most. In order to achieve self-waterproofing, the concrete thickness must be above 250 mm. Therefore, the roof of ordinary houses cannot be self-waterproof. So the roof is bound to leak.
Houses and roofs in China have a five-year warranty period, and developers generally design top waterproof technology according to this standard. It is not easy to have problems in five years, and it is hard to say after five years.
It is very difficult to deal with roof leakage.
The roof has been leaking for a long time, so it is very troublesome to repair it. According to the truth, the roof belongs to the public part of the building, and the maintenance fund of the public facade can be used, but as we all know, it is too much trouble to spend this money.
Roof leaks, in addition to maintenance from the front, the back, that is, the indoor roof, also needs maintenance. At present, the treatment technology is generally to punch holes around the water leakage point, then fill all the gaps with high-pressure grouting, and realize waterproofing after expansion and solidification. But the problem is coming again. Once indoor repair is needed, it means that the waterproof layer of the roof has completely failed and the roof has been completely soaked in water.
So can I buy the top floor?
The two major pain points at the top make many people flinch from the top. But in fact, the top floor can still be bought.
For example, the following situations:
1, flat top to slope
The flat top floor actually has the effect of "secondary top floor" in living. Not only is the waterproof effect better, but also the cost of air conditioning is relatively less in summer because of the existence of the top of the slope. The waterproof and thermal insulation effect is better.
2. Send attic or other things
In order to sell the top floor more conveniently, some developers will build a small attic, or send balconies and sun rooms. Then these top floors can also be bought. The reason is simple and cost-effective. Waterproofing and heat preservation are not the most important issues.
3. Buy if it is cheap enough
Some top-level developers have great profits and are much cheaper, which can cover many later costs. The house is very expensive now. If the top floor is 5%- 10% cheaper than other floors, or more than 10%, you can certainly buy it.
In a word, the top floor is a floor with obvious advantages and disadvantages, and we can choose it according to our actual situation in the process of building selection.