How to reduce U-Value of PTFE roof system

How to reduce U-Value of PTFE roof system

Now more and more owners and architectures pay attention environmental protection and energy conservation, some countries also made a building code to meet the low U-Value, all design and roof system have to be done according too the code.

One single layer PTFE membrane must not be met the requirement, what should it do? Any way double layer PTFE membrane also can not be met the U-Value 1.1w/m2k!

In Macau project, Aerogel blanket combined with double PTFE membrane were success to meet U-Value 1.1w/m2k!