Double Ceiling Heat Insulation 双层隔热天花板

Received few calls and discussed about heat issue, many of us do facing heat problem especially those BHs converted from shop office or light industrial factories, I think we’ve learnt some methods from books or web on how to insulate heat from wall by creating double layer brick wall with insulation or gap, actually most of the heat is conducted from roof to ceiling.

If you are living in the double storey house, we know that the upper floor always warmer than the ground floor, we don’t like to stay at upper floor during afternoon time without air-con. This is the same for BHs, the top floor is where easiest to catch heat if your BH is not made with concrete roof. Many people do add a layer of insulator above the ceiling trying to reduce temperature, but it is not so effective or sufficient to bring down temperature especially those with metal sheet roofing and low roofing.

Heat is transferred in three ways. i.e. Radiation, Convection, Conduction. Insulation material added above ceiling will only reduce heat transfer mainly in Radiation, the hot air trapped between roof and ceiling would actually carry heat travelling everywhere then conduct through ceiling to nesting area.

Double ceiling insulation is one simple, economy and effective way to reduce heat transferred into nesting room. How we do is to install nesting plank 1ft to 1.5ft below existing ceiling, another layer of ceiling plate laying on top of nesting plank, then we should also add insulators above both ceiling layers for better insulation, thus gap in between ceiling layers become another air insulation layer. Again you need double ceiling insulation only on the top floor.


接到有几通电话讨论有关隔热问题，我们许多会面对隔热的问题，特别是那些从店屋或轻工业工厂改建的燕屋，我们可以从一些书籍或网站学到以双层墙绝缘或空隙隔热的方法，不过同常大部分热能是从屋顶传到天花板里面的。

如果你是住两层楼的房子，我们知道，楼上总是比较热，在下午时间又如果没有冷气我们都不喜欢留在楼上。燕屋也一样，如果不是石灰屋顶，顶层是最容易热的地方。很多人都会增添层绝缘层降低温度，但它是不是那么有效的，尤其是那些金属板屋顶和较低的屋顶。

热量传递有三种方式，即辐射，对流，传导。天花板上添加隔热绝缘料只会主要减少辐射传热，但在屋顶和天花板之间热空气会通过对流和传导透过天花板传入造窝区。

双层隔热天花板是一个简单，经济又有效的方法减少热量传入造窝区。做法就是，把燕板安装在天花板以下1英尺至1.5英尺的高度，然后铺设另一层天花板在燕板上，之后我们也应该在两层天花板上加入绝缘层以达到更好的效果，然而两层天花板之间成空气隙隔层。我在重提，你只需要在顶层使用双层隔热天花板。