About Iowa Storm Shelters

Granger Plastics Company was founded in 1994 by John Grimes, a 40 year pioneer, integral thru the history of the Rotational Molding. His father, John Grimes Sr., was one of the "founding fathers" of the Rotational Molding Industry in the United States. After starting the company with other partners, John quickly out grew the company’s original Sharonville, location in it’s first 2 years. In 1996, needing to move for required growth; John and his business partner chose another Cincinnati-Dayton area suburb of Middletown, OH. It was at this time, John started branching Granger Plastics into new opportunities that developed into integral, long term relationships for Granger Plastics.

As Granger Industries grew into an eclectic number of industries, OEMS and manufacturing bases, Granger found it necessary to continue to grow into other areas and avenues. Over the last few years, Granger has made a number of large capital improvements leading to added warehousing abilities to help in commodities pricing, added metal working equipment to aide in it's in-house tooling fabrications and repairs. Granger has also made great strides in working with a number of additives and effects leaders in the materials industries to stay on the leading forefront of rotational molding material developments.

Granger continues to stay on the forefront of the plastics industry by providing industry leading innovations such as the Granger ISS Tornado Shelter and the Sandsaver™ Beach Erosion barrier.


Industry leading triple layer protection!

The only Storm Shelter offering a double wall foam filled body with a 5 layer composite door that exceeds FEMA 320 & FEMA 361 standards!

The Granger ISS Storm Shelter is the only shelter in the industry that offers double wall, foam filled construction!

Read More

Granger features nearly 20 years of industry leading shelter research, development and manufacturing experience!

Read More

Manufactured from Polyethylene, the Granger ISS shelter offers the longest useful lifespan of ANY underground shelter!

Read More

Custom Storm Shelter doors that match your landscape, home or even your favorite team! Available in a variety of colors!.

Read More