How to repair a roof where it meets a dormer

Written by cameron easey
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Roof lines that meet a dormer may need to be repaired or replaced if there is a leak or the singles have become bad or worn. If a leak occurs where the roof meets a dormer, you will need to see if the shingles are bad and then check to see if the flashing needs to be replaced. The flashing is installed to prevent water from seeping into the roof joints. You can repair a roof where it meets a dormer by first determining what needs to be repaired.

Skill level:
Moderate

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Things you need

  • Replacement shingles
  • Metal or plastic flashing
  • Roofing nails
  • Hammer
  • Galvanised nails
  • Utility knife
  • Nail remover
  • Pry bar

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Instructions

  1. 1

    Remove the shingles around the edges of the dormer by pulling up on them with a pry bar where they are nailed to the roof. You can also cut off layers of shingles using a utility knife.

  2. 2

    Remove the bottom two layers of siding from around the dormer. The flashing under the shingles is also laying under the siding on the dormer under a weather barrier.

  3. 3

    Pull up the weather barrier that was laid down over the flashing.

  4. 4

    Examine the flashing around the dormer to see if one section needs to be replaced or if it all needs to be replaced. If you are unsure of the condition of the flashing, you should replace it all to be on the safe side.

  5. 5

    Insert the pry bar under the flashing where it has been nailed and pry it up to pull up the nails. Use the nail remover to pull out the nails that were securing the flashing to the roof and the side of the dormer.

  6. 6

    Place new metal or plastic step flashing around the edges of the dormer and secure it to the roof and the dormer with a hammer and galvanised nails.

  7. 7

    Lay the weather barrier back down so that is covers the newly installed flashing.

  8. 8

    Place new shingles around the edges of the dormer and secure them using nails.

  9. 9

    Reattach the siding to the dormer to cover the edges of the shingles.

Tips and warnings

  • Galvanised nails are typically used for outside projects because they do not easily rust.
  • Ripping out the shingles without first seeing where they are nailed may result in additional damage that will need to be repaired.

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