Heavy Rain Storm

Heavy seasonal rains will drive water inside the structure where defects exist. Algae and mildew will thrive if conditions are right. It is wise to check the exterior of your house to make sure it is in tip-top shape.


Whether a house is on a slab, a crawl space, or basement (rarely used in central or southern Florida), ground grading should direct rain water away from the house.

Exterior wood on a house should be high enough from ground that it won't get wet during a downpour. A wide over-hang over exterior walls are less likely to get wet.

Landscaping around the foundation of a house should be placed far enough away from the house (two feet or more) to permit air to flow freely and prevent high humidity areas that allow algae and mildew to grow.
The crawl space, if there is one, should not have standing water after heavy rains and should be well ventilated.
  • Roof and Gutters

Neglect and damage can result in leaks, seepage and decay problems.

Check for damaged, curled, loose or missing shingles.

Check flashing around chimneys and vents for damage.
Remove leaves and debris from gutters and downspouts. Check for damage. Observe after heavy rain to see if water is flowing freely in them.
  • Remove accumulations of debris from roof.

Exterior Walls

  • Exterior walls should be free of leaks.
      Check masonry walls for cracks or loose mortar.
    • Painted walls should not have mildew, cracks or blisters.

    Windows and Doors

Look for gaps between windows or doors and walls. Use caulking to fill in.
  • Replace broken or cracked putty as well as weatherstripping that is loose or damaged.

Swimming Pools

Untreated or under-treated swimming pools will result in algae growth.
  • Do not drain pool. The sun can dry it out and cause it to crack, or considerable rain pressure can build up outside and cause it to crack.

Trimming and Mowing

• Regular trimming and mowing must be arranged to keep plants from taking over.

For more information go to:
How to Close Your Home. Virginia Peart. Department of Family, Youth and Community Sciences, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Publication date: January 2003. First published: January 1990. Reviewed: January 2003.