In tropical country like Malaysia, it is important to have a proper heat insulation against harmful UV and its hotness. Of course, there are more reasons why roof insulation is a must for many building. It makes cost effectiveness to the building by conserving coolness in the rooms. Unofficial statistics proves more than 40% energy saving can be achieved in term of electricity bill. When building has higher insulation value against heat or building receives decreased amount of heat energy, the less likely the air-conditioner is required. On the other hand, we can also view insulation in respective of preventing cool air temperature leak out from the house.
Improving roof insulation besides save utility bill, it helps our earth by decreasing the greenhouse gas emissions through lower energy consumption. Some household who cannot afford frequent air-conditioner usage can use roof insulation as a natural way to cool down the room temperature without utilizing energy which then cause costly electricity bill, enable comfortable life at home at minimal cost is important because you spend most of the time there beside workplace.
In addition to heat insulation, some heat insulation material also offers sound insulation feature. Soundproof is also important in Malaysia’s building, especially high-rise building in city center and low-rise building near main road. These places are example where sound insulation material is required to ensure comfy life.
Heat insulation can be measured by both R-value and U-value, the first one is heat transmission or heat transfer resistance level while the latter is heat transfer rate. They have reciprocal relationship where the higher the R-value, the material performs better in resistance to heat transfer; but then, U-value should have kept at lower point because it means a weaker heat conductivity.
Thermal need is first criteria when it comes to picking up the suitable roof insulation material, it can be over cost when apply insulation material that has over specification than it is necessary. In addition, maintenance work effort, time, cost factor should also be considered. Roof insulation material shall have convenience in installation (fast and effortless), not complicated when it need to repair, replace and easy to maintain. The spare parts should also easy to be found, costless to be purchased, long lasting and less likely to be obsolete.
Rigid roof insulation in Malaysia inclusive of perlite, wood fiber, expanded polystyrene (EPS), extruded polystyrene, polyisocynaturate, gypsum board (more to ceiling underneath the roof), cellular glass, other natural and non-natural materials.
Perlite insulation material (also known as perlite insulation board) comprises of organic fiber, organic binder, expanded silicaceous volcanic glass, inorganic, perlite. Asphalt coating or other type of coating are applied to minimize the adhesiveness.
Wood fiber comprises of cane, vegetable fiber, wood in mixture with binder and filler, it also being infused by asphalt or coated by asphalt in order to boost resistance against moisture.
This material is actually a foam plastic which closed-cell insulating through sandwich format, in between glass-fiber-reinforced aluminium foil facer, organic or inorganic felt facer, glass-fiber mat facer. Chlorine-free propelling agent makes foam expandable, decreasing the interlinked space in between cell, which is then converting higher resistance level against heat. Diffusion of air along the closed-cell struc