Flashing, vents, valleys, decking: a problem often starts at one part. These pages explain each part, what goes wrong with it, and what to ask a roofer.
A drip edge is a piece of sheet metal flashing along the roof edge. Its lower lip sticks outward to control the direction of dripping water.
Rake snow off the eave from the ground, never from a ladder, since using a rake or shovel on a ladder greatly increases the risk of falling.
Yes, flashing can be repaired, and repairs belong to a professional roofing contractor.
Soft or peeling fascia may be repairable, or the board may need replacing. How far the damage goes decides it.
Algae and fungus stains on asphalt shingles don't mar the roof's strength or service life. Moss is different: it can lift shingles and let water in.
A sagging roof is a reason to have the structure checked by a qualified person, not a dip to judge by eye. Check from the ground, never from the roof.
An ice dam forms when snow sits on a roof whose deck is above freezing. The heat usually comes from your house, and the melt refreezes at the cooler eave.
Sealant is enough only if the flashing is still in good condition. If it has deteriorated, the fix is to reflash it, not to caulk over it.
From the wood up: decking, underlayment, flashing and drip edge, then shingles. A roof is a stack, and each word on a quote names one part of it.
Look from the ground and from the attic, and stay off the roof and ladders.
Yes, a missing ridge cap piece can let water in. A professional roofer, not you, should do the repair.
Roof rot is wood that stayed wet long enough to decay, and rotted boards get replaced.