Locating Leaks: Ten Common Trouble Spots

Roof leaks can be a significant problem for homeowners, causing water damage and structural issues. Advantage Remodeling and Roofing in Allen, TX, identifies common leak locations and offers tips on locating and repairing them.

1. The Field of Shingles

  • Description: The expansive area of shingles on a roof.
  • Inspection: Look for missing granules, cracks, or nails that have backed out.

2. Valleys

  • Description: Lines where two roof planes intersect.
  • Inspection: Ensure shingles are properly trimmed and overlapping, and check for underlayment integrity.

3. Head Wall Flashings

  • Description: Metal flashings where the roof stops at a horizontal wall.
  • Inspection: Check for proper extension over shingles and look for tar or caulk repairs indicating previous leaks.

4. Wall Step Flashing

  • Description: Flashings at points where the roof meets a vertical wall.
  • Inspection: Look for holes, rust, or improper installation.

5. Chimneys

  • Description: Chimneys have multiple types of flashings, making them common leak sources.
  • Inspection: Check for cracks, broken soldered corners, or holes in the flashing.

6. Plumbing Vent Flashings

  • Description: Flashings around plumbing pipes.
  • Inspection: Look for cracked rubber seals and ensure proper placement under shingles.

7. Furnace or B-Vent Flashing

  • Description: Similar to plumbing vent flashings, often with a metal storm collar.
  • Inspection: Ensure the storm collar is tight and the flashing is in good condition.

8. Wind-Blown Rain Leaks

  • Description: Rain driven by wind can penetrate even well-installed roofs.
  • Prevention: Hem the edges of metal valleys and use roofing cement on windy sides of the house.

9. Non-Roof Leaks

  • Description: Leaks that appear to be from the roof but originate elsewhere, such as attic condensation or plumbing issues.
  • Inspection: Check for high humidity in the attic and inspect plumbing lines for leaks.

10. Flat Roofs, Low-Slope Roofs, and Steep Roofs

  • Inspection Tips:
    • Flat/Low-Slope Roofs: Check drains, seams, and for any mechanical damage.
    • Steep Roofs: Look for exposed nails, damaged mortar, and improperly installed gutter details.


Identifying and addressing common leak locations early can prevent significant damage to your home. Regular inspections and maintenance are crucial for maintaining roof integrity.

For insights on metal roofing, click here. 

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