General

Question 1

What are the 3 types of flat roof

Answer 1

Warm
Cold
Inverted

Question 2

What is a warm roof?

Answer 2

Insulation is located above the roof deck

Pros
Little to no thermal bridging.
Breathable
Energy efficient

Cons
Reduced height
Final finish is soft

Question 3

What is a cold roof

Answer 3

Insulation is placed between the rafters or floor joists

Pros
Saves space
Easy to install during building phase

Cons
Requires ventilation to dispel moisture

Prone to cold bridging

Question 4

What is an inverted roof

Answer 4

flat roof where the waterproofing layer is beneath the thermal insulation.

Pros
Membrane is protected

Cons
Required ballast which add additional weight