Many factors can damage your roof and shorten its life. Here are nine of the most common roofing risks.
(1) |
(2) |
(3) |
Ceiling Spots |
Damaged Flashing |
Missing Shingles |
- Caused by leaks in roof
- Check attic or crawlspace for leaks in deck
- Check chimney and vents for cracks in flashing
- Check rafters for leaks that travel away from original source
- Check roof for damaged shingles
|
- Caused by improper installation
- Caused by drying and cracking
- Usually can be repaired without replacing roof
|
- Caused by improper fastening
- Caused by exposure to high winds
- Usually can be replaced individually
|
(4) & (5) |
(6) |
(7) |
Buckling & Curling Spots |
Blistering |
Algae Growth |
- Caused by improperly applied felt (buckling)
- Caused by movement in deck (buckling)
- Caused by undersaturation of felt in organic-based shingles (curling)
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- Caused by moisture in shingles
- Caused by excessive use of asphalt plastic cement
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- Caused by growth of airborne algae deposited on roof
- Unsightly appearance does not affect the service life of the material
- Common problem in warm, humid climates
- Algae-resistant shingles available regionally
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(8) |
(9) |
|
Missing Granules |
Rotting |
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- On newly applied shingles, a certain number of loose granules is normal
- On aging shingles, missing granules indicate need for replacement
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- Caused by absorption of moisture by mat at the core of the shingle
- Common problem with organic-based shingles
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