Underground Storm Shelter, Underground Tornado Shelter

Underground shelter dealers

America's leading Single Family Underground Shelter

With decades of industry leading underground tornado shelter experience and thousands of families that trust the Granger ISS for near absolute storm and tornado protection, shouldn't you too strongly consider the Granger ISS Underground Shelter to provide your family peace of mind during the next severe weather warning?

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Underground Shelter Dealers by state

  • Alaska
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  • Connecticut
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  • District of Columbia
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  • Georgia
  • Hawaii
  • Idaho
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  • Kentucky
  • Louisiana
  • Maine
  • Maryland
  • Massachusetts
  • Michigan
  • Minnesota
  • Mississippi
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  • Montana
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  • Nevada
  • New Hampshire
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  • New Mexico
  • New York
  • North Carolina
  • North Dakota
  • Ohio
  • Oklahoma
  • Oregon
  • Pennsylvania
  • Rhode Island
  • South Carolina
  • South Dakota
  • Tennessee
  • Texas
  • Utah
  • Vermont
  • Virginia
  • Washington
  • West Virginia
  • Wisconsin
  • Wyoming

  • Underground shelters,Underground Tornado Shelters, Underground Storm Shelters, Underground Safety Shelters, Survival Shelter, Certified Shelter

    near absolute protection

    Provide your family with near absolute tornado, storm and inclement weather protection with an underground shelter.

    Meets or Exceeds all applicable FEMA 320 & ICC 500 specifications.

    1,000+ year lifespan

    Scientifically proven 1,000+ year lifespan, the Granger ISS is the ONLY storm shelter that can offer near absolute protection for generations to come! Take your protection investment to the next level with a
    Granger ISS!

    Easy shelter installation

    The patented reverse taper design of the Granger ISS Underground Shelter allows for simple, easy installation virtually anywhere with no anchoring system required. Most installs complete in or around 4 hours or less!
    Easiest Underground Shelter install!