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Date:2012-01-06 22:56:04
The results of the survey surprising. On the property without the use of a exterior insulation material facts, the developers responsible person to be recognized, but stressed that no execution is the cause of" the market to find suitable for class-A fireproof material, and even found, because the relevant departments did not publish such material construction technology and inspection standards, also dare not to use." Experts say even more surprising, exterior insulation class a material new provisions not implemented phenomena occur not only in the market, Beijing and even throughout the country, as long as it is in 2009, 2010 the two started housing project will be a similar problem.
We to the Zhejiang Hangzhou, Jiaxing, Ningbo, Huangshan City, Anhui, Harbin, Mohe County, Heilongjiang city of Hefei and the 65 article implementation issues investigation shows, at present is in build a project especially 2009, 2010 started in March this year after the completion of the residential project after almost always occur external insulation materials do not conform to the provisions of the 65 problem. Open the search such as Baidu website, input" exterior insulation materials" key words, there will be many to seek 65 article how to execute the problem.
In 65 files before September 25, 2009, the building housing the Ministry and the Ministry of public security has issued 46 documents" issued on the civil construction of external thermal insulation system and external decoration fire temporary regulations", the document second defined" civil construction insulation materials combustion performance suitable for class A, and should not be lower than B2." Currently on the market a exterior wall thermal insulation material for curtain wall structure wall construction, not suitable for ordinary residential exterior wall, therefore, in almost 46 was introduced later, throughout the country common residential use of B2 external wall insulation materials fire, and the final sale contract agreed to by the molded polystyrene foam board belong to this type of material.
Point of view
Qualified insulation material" scarce " widespread presence
The market is really not suitable for ordinary residential building external wall exterior insulation materials using a? We interviewed with the Beijing Building Energy Conservation Council Chairman Wang Qingsheng, China Academy of Building Research Institute of fire engineering professor Ji Guang, the original to live the total group technology center chief engineer, professor level high wages to choose green construction industry experts. Three experts to answer the same, developers said true, not only that, they said, Beijing and all over the country in 2010 2009, the two started housing projects are facing similar problems.
Wang Qingsheng tells us," currently on the market a exterior wall thermal insulation material for rock materials, suitable for curtain wall structure of public building exterior insulation construction, because the stone and aluminum curtain wall are connected through the keel and the wall, rockwool A-level external wall thermal insulation material is filled into the wall and stone or an aluminum plate and a space between. But the ordinary residential exterior wall is generally not a keel, paint or wall tiles can be affixed directly in the plastering mortar for exterior wall thermal insulation material, which requires insulation materials have a certain degree of hardness, rock wool, certainly not, like moulded polystyrene foam board such line. " Therefore, since March 15th 65, promulgated and implemented since, Wang Qingsheng has received the " Mayday " phone, many Beijing, Tianjin, residential project responsible person to call him" not to find a material, no relevant construction standard" how to do.
Experts say, there are group started to invest for residential use of the A-class exterior insulation fireproof material but overall costs from the original 100 yuan per square metre rise to around 300 yuan per square metre, and A-level external wall thermal insulation fireproof material of inorganic mineral, the production process of high energy consumption and pollution, does not fit me study on the industrial structure adjustment needs.
" Exterior insulation material is not only required to achieve a" fire" this one target, but also energy saving". The expert thinks, exterior insulation fireproof materials fireproof, and not the required material itself" combustible", and should be able to" flame", namely material in case of fire, to give the scene personnel escape, to provide a certain amount of time to rescue. In addition, any new exterior wall thermal insulation material experimentation and use, need overall balance insulation, fire safety, waterproof permeability, durable use, energy saving, cost and other factors, at present, 65 article about the civil housing class a fire prevention materials using rules, although the original intention was to strengthen the ability of civilian residential fire, but because of the material itself is still in the experimental stage, has not been widely used, but also the lack of practice.
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