Most of the signs can be seen from the ground and by looking at your roof.
One of the causes in the roofing area is looking dark or stained on your roof is the result of fungus or algae growth. It leads to the roof appear black or dirty normal in certain areas. This could be a problem for your roof as algae or mold started to undermine the basis of shingle cause them to loosen and decay.
If you see any dark areas on your roof and alarming climb on your roof to get a better view then contact a trustworthy roofing contractor to inspect your roof and determine whether the stain is the growth of fungus. You can know more about trussed roofing online.
Better to address the potential growth of the fungus before it spreads to other parts of the roof makes the headache and potential hit.
Shingle and causing damage
Damage to the shingles, or even worse the roof sheathing, can be caused by a number of factors. Mold and fungus can undermine the organic basis of shingles causing them to rot. If this relationship is weak then it makes your roof is more susceptible to lose during high winds during a storm potentially could ultimately jeopardize the integrity of your roof. If your roof seems slack in that area could be a sign of a much larger problem called rotten roof that can lead to the possible collapse of your roof. By having a professional inspect your roof so that you can avoid the cost of additional improvements to the interior roof of your house.