Asphalt Roofs

Question 1

What is an asphalt roof flat roof?

Answer 1

• A roof covering consisting of asphaltic cement and aggregates.

Question 2

What defects might occur on a flat asphalt roof?

Answer 2

• Blistering whereby trapped moisture under the asphalt vaporise, forms a blister which can then rupture causing water ingress.
• Surface crazing and deeper cracking caused by asphalt becoming brittle through thermal stress.
• Cracking around junctions with other roof components caused by differential thermal movement.
• Cracking caused by movement within the structural deck.
• Mechanical damage caused by repeated foot traffic.