Short Answer
Because the visible symptom may be repaired without addressing the underlying cause. Examples include replacing shingles without correcting flashing, sealing a penetration without correcting drainage, and repairing a gutter without correcting fascia deterioration.
Detailed Explanation
When a repair fails repeatedly, it usually means the repair is treating the symptom — the visible water, the damaged shingle, the leaking joint — without fixing the cause — the failed flashing, the inadequate drainage, the rotted substrate. For example, if a roof leaks at a chimney and the repair is to add more sealant around the flashing, the leak will return because the underlying problem (deteriorated or improperly installed flashing) hasn't been corrected. Similarly, if a gutter is leaking at a seam and the repair is to seal the seam, but the gutter is sagging because the fascia is rotted, the seam will reopen because the gutter is still moving. Effective repairs require diagnosing the root cause and addressing it, not just treating the visible symptom.
Why It Matters
Repeated repairs on the same problem indicate the root cause isn't being addressed. Each repeated repair wastes money without solving the problem.
Common Mistakes
- ✕Treating symptoms instead of causes
- ✕Not investigating why the previous repair failed
- ✕Accepting temporary fixes as permanent solutions
Questions to Ask Your Contractor
- ?What's the underlying cause of this problem?
- ?Why did the previous repair fail?
- ?Is this repair addressing the root cause or just the symptom?
- ?Is there a more permanent solution?