Ceiling leaks When it Rains, Roof Looks Good
Since the general vicinity of the leak is at the peak of the roof it definitely decreases the amount of time pinpointing the exact location. Depending on your roof pitch it is quite possible for rain to be blown under the roof shingles. The easiest why to repair the opening is with roof cement. Any brand that is petroleum based will work. And because you know the general location start by checking each shingle to see if it can be lifted from the one below it. Shingles have a adhesive strip that bonds it to the one below. If you locate one gently lift it enough to smear a tablespoonful of roof cement and press back into place. Also be on the look-out for roofing nails that have worked their way through the shingles. Although rare nail 'pops' do occur on roofs. It maybe easier to remove the nail than risk damaging the shingles by hammering it back. Apply cement if you do. Check the cap shingles on the ridge line. U.V rays will desiccate the asphalt to the point it becomes crumbly. Look for any splits on the shingles and 'thread-bare' ones that have lost their asphalt particles from erosion. Trowel cement just enough to do the job (too much may soften or melt the shingles in heat prone climates.