Find and thoroughly read as many reviews as possible, taking note of both positive and negative feedback. Remember that a roofer with a lot of reviews may seem good until you do a deeper dive to determine if the bulk of the reviews are negative. Projects like repairing damaged gutters will only be around $180 to $560, whereas repairing a sagging roof will be a higher expense at $1,500 to $7,000. Even if you have blue or green algae, lime stains , or fungal stains on your home, if we get to you i...