Roof ventilation upgrades, such as ridge vents and attic followers, reducing heat buildup, moisture issues
https://www.scribd.com/document/1047291619/Roofer-in-Vancouver-Reveals-the-5-Hidden-Signs-Your-Roof-Needs-Help-147947
Roof air flow upgrades, along with ridge vents and attic lovers, decreasing heat buildup, moisture issues, and electricity rates for the time of the 12 months.