With the growing awareness of Passive House principles, we can now illustrate the wider benefits of warm roof design.

We recently conducted a simple experiment comparing the temperature of different coloured membranes in the Auckland sun. 

Recently, flat roof systems and product technology have grown more complex, with options such as reinforced modified bitumen and TPO membranes providing different performance benefits. 

Planning ahead and installing an accessible flat roof can keep options open for creating additional living spaces in years to come. 

Designing ventilated cold roofs or airtight warm roofs without careful attention to risks of condensation can compromise the whole building fabric and integrity.