The only storm shelter with a 1,000+ year life span!
Severe weather is notoriously unpredictable. We have a vast knowledge about the conditions and suroundings that cause it and how often this occurs throughout the country. We have sophisticated warning systems, as well as extensive radio and 24/7 news and television coverage of these storms and Tornadoes as they approach and even destroy. Even with all of this technology and warning systems, still hundreds are killed each year from tornadoes, freak storms and other disasters, with thousands more injured. Property loss is routinely in the billons of dollars.
The only Storm Shelter with a Safe Room/Panic Room quality door!
See the NEW Granger ISS door exceed both FEMA 320 & FEMA 361 testing!
See the new generation of Granger ISS Storm Shelter doors under go FEMA 320 & FEMA 361 testing at Texas Tech University's Wind Science & Engineering Research Center. The Granger ISS is an underground Storm Shelter, so in theory, it only needed to be tested to FEMA 320 standards. Due to the high quality engineering staff at Granger Plastics, the Storm Shelter door not only meets or exceed FEMA 320 standards, it also meets Above Ground Safe Room criteria by exceeding the FEMA 361 standards. The same door passed (2) tests, being impacted (3) times by a 15 pound 2 x 4 at 67 mph, then seeing an additional (3) impacts, by a 15 pound 2 x 4 at 100 mph. Even though the second test was unnecessary due to the Granger ISS Storm Shelter being an underground unit, but went forward with the more grueling test anyway to display Granger's commitment to safety, innovation and quality. This is all just another example of why Granger Plastics produces the best storm shelter available for single family consumers. Granger Plastics has been manufacturing Storm Shelters for over 15 years currently. Even gaining international attention as early as 10 years ago from Internationally recognized publications such as Plastics News, USA Today and a number of news channels and media outlets across the country!
Click any of the links or videos below to watch or read the appropriate story
Granger Plastics has been building Storm Shelters for over 15 years now! Unlike many, who opt to only seasonally get into the business, or only pursue the business when the storm season is convenient for them, Granger Plastics manufactures World Class innovations year round, for over 17 years now. Granger has innovated its own patented Storm Shelter design.
Granger Plastics, a world leading Rotational Molding company, takes great pride in its manufacturing of safety products, such as Storm Shelters. When your Granger ISS Storm Shelter door does its job of saving you and your families lives from an inclement, National Weather Service verified Tornado and your Storm Shelter door sees impact damage from Tornado debris, Granger Plastics and your local dealer will replace your door free of charge. Just pay shipping and handling and you will recieve a brand new door, to ensure your families safety. As simple as that! We are committed to your family's safety!
Storm Shelter gallery
In-Ground Safety Shelter
Click any of the Tornado Shelter images to the right and see them appear in the gallery above. The Granger ISS Tornado Shelter is the only Storm Shelter that comes complete with the package of amenities and features along with a limited lifetime warranty and a material durable enough to have a usable life span exceeding 1,000 years! Browse the website to see why the Granger ISS is the best Tornado Shelter, providing the best customer service and protection in the industry!
Storm Shelter with a Lifetime Warranty!
The Granger ISS Storm Shelter is the leading Storm shelter innovation on the planet! It's the only double wall polyethylene unit manufactured by a world leading Rotational Molding company! The Granger ISS Storm shelter is guaranteed not to crack, rust, rot, leak or float. The Granger ISS is the only Storm Shelter on the market to have a 1,000 plus year life span! The Granger ISS Storm shelter out performs any other inferior shelter materials such as fiberglass, steel and concrete!
Storm Shelter installs flat in backyards, patios or garages!
The Granger ISS installs so the door is flat to the ground, No crazy Hills or Ugly Pitchers Mound Effects!
Specializing in the large and difficult to mold products and components, Granger Plastics keeps itself ahead of the rest, by constantly pursuing better innovations. By continuing to consistently find new developments within the potential of Rotational Molding, Granger Plastics plays an integral role in many companies new products or process developments. Producing parts of extreme strength and durability, Rotational Molding, lends itself to produce some of the wildest conceived products ever! Products such as In Ground Safety Shelter, that have polymer body life spans that will exceed 1,000 years! These kinds of factors show how Granger Plastics continues to innovate amongst other Rotational Molders.
Severe weather is notoriously unpredictable. We have a vast knowledge about the conditions and suroundings that cause it and how often this occurs throughout the country. We have sophisticated warning systems, as well as extensive radio and 24/7 news and television coverage of these storms and Tornadoes as they approach and even destroy. Even with all of this technology and warning systems, still hundreds are killed each year from tornadoes, freak storms and other disasters, with thousands more injured. Property loss is routinely in the billons of dollars. 
