Have one person climb on the roof and spray water above the suspected leak location.
How repair a roof leak.
Run water on the outside with a hose.
For example soak the downhill side of a chimney first then each side then the top on both sides.
Eventually after some time of your roof building it will leak because of the exposure of the elements.
If a leak is difficult to find enlist a helper and go up on the roof with a garden hose.
You have to identify the signs and repair them in time.
You can hire a professional company for the repair of the roof.
Start low soaking the area just above where the leak appears in the house.
It will give you many signs in your ceiling and the walls that the roof is leaking.
It may not be a direct line but it will always be above the ceiling leak location.
Patch the nail or screw holes by slipping a piece of roof flashing underneath the shingle.
Look above the ceiling leak point and scan the sheathing leading towards the peak of the roof.
Quickly fix a roof leak by slipping a sheet metal flashing up under the course above the hole.
For loose or damaged shingles remove them by pulling the nail out and scraping glue from underneath the shingles before replacing with new ones.
Repair leak in roof tips.
To repair a leaking roof with curled shingles straighten the shingles with a heat source like a hair dryer and reattach them with asphalt roof cement or compound.