Leaking roofs can be frustrating, but DIY roof leak repair is manageable with some basic knowledge. Begin by inspecting the roof for cracked or missing shingles, and check the flashing around vents and chimneys. If you find damaged shingles, carefully remove them and replace them with new ones. Apply roofing caulk to seal any gaps or cracks, particularly around flashings. Ensure gutters are clear of debris to avoid water buildup, which can exacerbate the issue. Check the attic for moisture and make sure there are no hidden leaks. Always take safety precautions when working on the roof. If the issue persists, consider contacting a professional.