Not enough ventilation. Moisture from inside the house is condensing on the underneath side of the roof.
Every roof requires regular inspections so repairs can be made before leaks set in. You can inspect your roof without every setting foot on your shingles by using a pair of binoculars. Staying on the ground and using your binoculars, you can inspect the shingles all around your roof. Look for any that are curled, broken or missing completely. The attic should be inspected for leaks. The binoculars and a good flashlight will allow you to see throughout the attic. Watch closely for rust stains on the nails and condensation. Finally, step back and look at the overall roof. Dark stains running down the shingles indicate a loss of the protective granules and could indicate that it's time for a new roof.
Common signs of an attic leak include water stains on the ceiling, damp insulation, mold growth, and musty odors. Solutions for an attic leak may include repairing damaged roof shingles, sealing gaps or cracks in the roof, improving attic ventilation, and ensuring proper insulation. It is important to address attic leaks promptly to prevent further damage to the home.
attic
The term you might be looking for is Ridge.
The room under the roof is called an "Attic".
That depends on what you are trying to say. Nails are in the roof to hold the shingles in place, but he stands on the roof while nailing those nails.
To effectively insulate your attic roof and improve energy efficiency in your home, you can start by sealing any air leaks and then adding insulation material such as fiberglass or cellulose. Make sure to follow recommended R-values for your region and consider hiring a professional for proper installation.
sometimes, this answer is obvious: a hole in your roof, missing shingles, leaks, or animal living in your attic. Other times, the signs you need a new roof are little more subtle. if your roof is more than 12-15 years old, it may be time to get a replacement and get ahead of any problems that result from a damaged roof.
To effectively locate and repair roof leaks in your home, start by inspecting the roof for any visible damage or missing shingles. Use a flashlight to check for water stains on the ceiling or attic. If you find a leak, mark the area and repair it using roofing cement or a patch kit. Consider hiring a professional roofer for more complex repairs. Regular maintenance and inspections can help prevent future leaks.
attic
More insulation in the attic, better air flow through the attic, direction the roof is pointing, less sun, the pitch of the roof, Any or all of these.
attic