1 – Hiring the wrong roofing company

 

2 – Slope

 

3 – Ventilation

 

4 - Nails

 

5 – Time

 

6 – Old Components

 

7 – Freeze thaw cycles

 

8 – Ice & water shield

 

9 – Wind and hail damage

 

10 – Vent collars

 

11 – Blistering summer heat

 

12 – Crickets & water diverters

 

13 – Roof decking

 

14 – Missing shingles

 

15 – Flashing

 

16 – Shingle spacing

 

17 – Cleaning