Perfect example of a leaky chimney
Whether it’s due to aging caulk, cracked cement caps or flashing problems, chimneys are one of the biggest problem areas when it comes to leaks. Many (but not all) chimney leaks can be repaired by peeling off old, dried caulking and roof sealant from around the chimney’s base. Inspect each area of flashing for cracks, holes or damage, and replace flashing as needed. To improve the integrity of your flashing, remember to use a high-quality, flashing cement to re-caulk the area (rather than traditional roofing cements and sealants). If you have a more invasive leak caused by cracked mortar joints, stone or brick displacement, consider calling your local roofer who will perform a thorough roof inspection.
Leaks in the Roof Field
For aging homes, it’s common for leaks to occur in the shingle field—whether it’s slate, shake or composite shingles. If your roof is strong enough to walk around on, inspect the shingle field for missing granules, cracks, displaced tiles or unfilled nail holes. Depending upon how severe the roof field leak is, you may be able to replace individual shingles, slates or tiles quickly and easily. If the entire roof is suffering from severe wear and tear, however, it may be safer—and more cost-effective—to replace it completely.
Leaks in Roof Valleys
When two portions of your roof intersect, the resulting line is called a “valley.” Valleys typically contain a type of metal flashing, but in some cases, shingles or tiles may just butt up against one another. Either way, valleys are a common source for roof leaks. If your roof valleys contain metal flashing, it’s possible that the shingles were improperly cut, allowing water to leak behind faulty shingle tips and seep into your attic or down your walls. Valley leaks tend to be more complex to repair than other types of damage, so it’s best to leave them up to the professionals.