AN UNBIASED VIEW OF OTTAWA ROOFING

The roofer also said there was some fungus/mildew developing inside the attic (white places on many of the roof joists), which was an indication of poor ventilation while in the attic. After i re-roof, should really I am going With all the plywood as opposed to OSB? Really should I have the number of attic vents improved?There are actually countles