How to Get Rainwater Off a Flat Roof

Written by owen e. richason iv
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Flat roofs on residential homes are not as common as pitched roofs, because pitched roofs use a combination of tiles or shingles, along with a little help from gravity, to keep rainwater from pooling on the roof's surface. This prevents roof leaks. Flat roofs are most often found in warm climates where a build-up of snow and ice is not an issue. In addition, flat roofs give ample use of interior space that pitched roofs do not. To remove rainwater from a flat roof, you have a couple of options.

Skill level:
Moderate

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Things you need

  • Ladder
  • Indoor/outdoor push broom
  • Floor squeegee
  • Tar
  • Rubber roofing
  • Roof siphon
  • PVC piping
  • Flat roof drain

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Instructions

  1. 1

    Place a ladder under the flat roof in an area that is accessible to climb and walk onto the roof. Bring a indoor/outdoor push broom and a floor squeegee with you onto the roof.

  2. 2

    Push the rainwater off the flat roof, using the push broom, and then remove any remaining rainwater with the squeegee. You may also try to use a shop vacuum to remove excess rainwater from a flat roof.

  3. 3

    Place a roof siphon designed to run on a timer on the roof. Run PVC piping from the siphon over the roof's edge. You can also install a flat roof drain.

  4. 4

    Keep rainwater from accumulating and causing leaks by tarring the roof or laying down rubber roofing on the flat roof.

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