There are missing shingles on the roof our garage. How can I determine whether it is better to replace the missing shingles or replace the entire roof?


It is possible to replace individual shingles when some become missing but there are factors to consider before deciding to replace the whole roof covering.

  1. Percentage of the total number of shingles that are missing.
  2. What is the age of the current roof covering.
  3. Type of shingles be they asphalt, wood, clay tile, metal or other type.
  4. Are shingles a type that are spot glued in place.
  5. Do other shingles overall look to be in good condition.
  6. Are spare replacement shingles of the same style/color available.
  7. Is roofing currently installed over one or more older shingle layers.
  8. Is replacement cost a factor.
  9. Would replacement with another shingle type be desired.
  • Another: the condition of the roof sheathing (evidence of deterioration in attic, or soft areas on roof) – fixer1234 Jul 6 '18 at 10:00
  • re: #3... type is important, as something like slate is notoriously hard to replace without breaking others. (Rule of thumb seems to be that if 20% of slate tiles are a problem, then complete re-roof is appropriate.) Clay, etc would be a little less of an issue; asphalt and most metals are very walkable. – Aloysius Defenestrate Jul 7 '18 at 13:58

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